Abstract

Spatial division multiplexing in multi-mode fibers allows to largely enhance transmission capacity compared to single-mode links. Photonic integrated circuits can provide solutions for mode multiplexing at the transmitter and demultiplexing at the receiver but have to generally face high losses and inter-modal cross-talk issues. Here a photonic circuit for efficient mode multiplexing and demultiplexing in few-mode fibers is presented and demonstrated. Two 10 Gbit/s channels at the same wavelength and polarization are simultaneously transmitted over modes LP01 and LP11a of a few-mode fiber relying only on integrated mode MUX and DEMUX. The proposed Indium-Phosphide-based circuits have a good coupling efficiency with fiber modes and mode-dependant loss smaller than 1 dB. Measured mode excitation cross-talk is as low as −20 dB and a channel cross-talk after propagation and demultiplexing of −15 dB is achieved. An operational bandwidth of the full transmission system of at least 10 nm is demonstrated. Both mode MUX and DEMUX are fully reconfigurable and allow a dynamic switch of channel routing in the transmission system. These results enable fully-integrated fiber mode handling for high-bandwidth flexible optical networks.

© 2016 Optical Society of America

1. Introduction

Constant progress of optical technologies allowed to increase the data-transport capacity of each single optical fiber through the exploitation of multiplexing in phase, time, wavelength and polarization. Nonetheless, fiber capacity limit is expected to be around the corner [1, 2]. Research has hence focused on the exploration of ’space’ as the fifth physical dimension for signals multiplexing which could avoid capacity crunch [3]. Spatial, or mode, multiplexing allows to conveniently increase the transmission capacity of optical transport systems, being largely more energy-efficient if compared to single-fiber systems at high capacity [4].

Although few-mode optical fibers (FMFs) were proposed more than thirty years ago, they have recently drawn the attention as a viable solution for the implementation of Spatial Division Multiplexing (SDM) [1]. Compared to single-mode fibers (SMFs), FMFs increase the fiber spectral efficiency exploiting orthogonal propagating transverse modes to simultaneously convey multiple data streams, which are recovered through a receiver equipped with mode diversity capabilities [5]. Mode multiplexing over FMFs allowed to reach transmission rates of several Terabit per second over distances up to hundreds of kilometres [5, 6]. Few-mode compatible network components such as (de)multiplexers, erbium-doped fiber amplifiers [7] and optical add/drop multiplexers [8] have been proposed as well.

Many of the reported systems rely on free-space optical elements (e.g. lenses, beam splitters and phase plates) [6, 9] and/or photonic lanterns [10] to prepare optical modes, (de)multiplex and (de)couple them with FMF modes. Although effective, these solutions can be hardly scaled-up and included in densely-packed commercial modules. Photonics integration is hence a mandatory technology for future few-mode compatible optical networks, enabling low-loss mode couplers [1,11], reducing costs, further improving power efficiency [3] and making mode-based SDM solutions competitive against single-mode networks. Alongside with pure on-chip design for data interconnect [12, 13], photonic integrated circuits (PICs) have been proposed also as mode (de)multiplexers for SDM transmission applications. Typically, PICs rely on either vertical spot couplers [5,14] or butt coupled mode converters [15].

Even if the use of PICs as mode (de)multiplexer [16–18, 21] has already been proposed, up to our knowledge a clear demonstration of a transmission system relying exclusively on reconfigurable photonic circuits to simultaneously transmit and receive multiple fiber modes has not yet been reported. In this work, a PIC providing both two-mode multiplexing at the transmitter and demultiplexing at the receiver is proposed and demonstrated. Circuit performances are evaluated with both simulations and experimental characterizations at 10 Gbit/s. The integrated transmitter is used to selectively excite modes LP01 and LP11a of a FMF which are demultiplexed by the receiver after propagation. A few-meter-long fiber is used in this work in order to demonstrate mode (de)multipexing functionality of the proposed PIC. A coupling efficiency of about −6 dB is achieved with mode-dependant loss smaller than 1 dB. On-chip mode crosstalk as low as −20 dB is measured while a channel cross-talk of about −15 dB is achieved after fiber propagation and demultiplexing. Reconfiguration capabilities of the mode (de)multiplexer allow to dynamically change signal routing at both transmitter and receiver and an operational bandwidth of at least 10 nm is demonstrated as well, making the design compatible with flexible networks and WDM transmission. PICs are realized in Indium-Phosphide-based technology integrating PIN photodiodes at the receiver and are suitable for laser sources and SOAs integration for a fully integrated SDM transceiver. The performances of the realized circuits shows a negligible polarization sensitivity and hence polarization control elements are not used in the demonstrated transmission systems. Lastly, two-mode SDM 10Gbit/s transmission over few meters of a FMF is demonstrated exploiting the proposed PIC as mode multiplexer and demultiplexer.

The paper is organized as follows. Section 2 presents the design of the circuit, the reconfiguration principle based on amplitude and phase controllers and coupling efficiency issues with fiber modes LP01 and LP11a. Section 3 reports the experimental characterization of both PIC operation and SDM transmission system exploiting the integrated mode (DE)MUX and a few-mode fiber. Circuit reconfiguration and bandwidth measurement are reported as well. In Section 4 the integrated mode MUX and DEMUX are exploited for the transmission of two 10 Gbit/s channels over a few-mode fiber.

2. Concept and circuit design

The schematic of the proposed mode DE(MUX) is shown in Fig. 1(a). When used as multiplexer, the circuit provides two single-mode input waveguides (S1 and S2, to be coupled to single-mode fibers) and one two-mode output waveguide (T, to be coupled to a few-mode fiber). The circuit implements a reconfigurable linear network [19] converting the fundamental modes of the two separated single-mode waveguides into the fundamental and first higher order mode of a two-mode waveguide. In the most general form it can be implemented by cascading a tunable amplitude controller and a tunable phase controller. The amplitude controller allows to adjust the splitting ratio of the input signals in the two branches of the relative phase controller. In this work, the amplitude controller is realized by means of a tunable coupler based on a balanced Mach-Zehnder interferometer with two 2×2 MMIs and a phase shifter ϕA. A second phase shifter is used to control the relative phase between the two branches after the tuneable coupler (ϕP) and to excite the desired mode. A symmetric Y-branch [20] with a two-mode common waveguide finally combines the two branches, as demonstrated also in [21] for a non-reconfigurable circuit.

 figure: Fig. 1

Fig. 1 (a) Schematic of the integrated mode (de)multiplexer. Two single mode waveguides are coupled to the fundamental and first higher order mode of a two-mode waveguide through a tuneable, linear, and fully reconfigurable circuit. (b) Cross-section of the InP-based waveguides exploited in this work.

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Since the circuit is completely reconfigurable, the two single-mode inputs can be mapped into any combination of the two modes of the output waveguide. We consider here only the simplest case where one input is coupled into either the fundamental or the first-higher-order output mode. The other input is consequently mapped on the other mode. This can be achieved by operating the amplitude controller as a 3-dB coupler (ϕA = π/2). In this case, when exciting input S2 the two outputs of the amplitude controller have the same power level and the same phase; exploiting S1 the two signals at the output of the amplitude controller have again the same power but a π phase difference. If now ϕP = 0 then input S2 is mapped on the fundamental mode while S1 on the first order mode; if ϕP = π the opposite mapping is obtained. Fundamental and first order mode are hence used to excite modes LP01 and LP11a of a FMF. An opposite behaviour can be obtained with ϕA = 3π/2. With this condition, the amplitude controller still operates as a 3-dB coupler but the phase relations at its output ports are inverted. Exciting S2 causes a phase difference of π while exploiting S1 the output of the amplitude controller have the same phase. Consequently also the final mapping on the modes at port T is the opposite with respect to that described above. Any other combination of ϕA and ϕP allows to generate at the output any field distribution as a linear combination of the two guided modes. Demultiplexing operation is obtained by reversing inputs and outputs, that is coupling light in the two-mode waveguide T through the FMF and collecting the output signals at the two single mode waveguides S1 and S2 with two SMFs or photodiodes. The described concept could be extended to more than two modes by implementing a larger reconfigurable linear network [22] and relying either on butt-coupling [15] or vertical coupling [5] for FMF interfacing.

Beam Propagation Method was used to verify the circuit behaviour and assess coupling efficiency between the output waveguide and a FMF. As shown in Fig. 1(b), the considered waveguide structure is rib-shaped with 1 μm-thick InGaAsP core on top of the InP substrate, etch depth of 1.7 μm and no top cladding [23]. Single-mode waveguides have a width of 2 μm while output waveguide is 4-μm-wide and allows the propagation of two guided modes. In order to provide low coupling losses, an adiabatic taper widen the waveguide width to 13 μm before chip output facet. After the taper, fundamental output mode excites LP01 mode of the FMF while first-order mode couples on mode LP11a. The final part of the phase controller and the two mode taper were simulated at an operational wavelength of λ = 1550 nm. Figures 2(a,b) refer to the MUX operation. At the input, the fundamental mode is excited in the two single-mode waveguides with the same amplitude since the tuneable coupler is considered to be set at 3-dB state with ϕA = π/2 (bottom of the figures). In Fig. 2(a) the two inputs have the same phase and the fundamental mode is excited at the end of the taper. Simulated coupling efficiency with LP01 mode of the FMF is about −6 dB. As mentioned before, this case corresponds to use input S2 with ϕP = 0 or S1 with ϕP = π. In Fig. 2(b) the two inputs have a π phase difference (input S1 with ϕP = 0 or S2 with ϕP = π) and the first-higher-order mode at the output is excited. Coupling efficiency with LP11a mode of the FMF is about −7 dB, confirming small mode-dependent losses. In both cases the insertion loss and mode conversion in the adiabatic taper are negligible. In Figs. 2(c,d) the DEMUX operation is considered. Input is provided by either mode LP01, Fig. 2(c), or LP11a, Fig. 2(d). In both cases at the two single-mode outputs the amplitude is the same while phase difference is 0 and π radians, respectively. Simulated coupling efficiencies are the same as in the MUX operation.

 figure: Fig. 2

Fig. 2 Propagation simulation through the last part of the integrated mode (DE)MUX, from the phase controller to port T. The simulation is based on the Beam Propagation Method and color scale is normalized. Z-axis refers the direction of propagation while X-axis refers the cross-section view. (a) and (b) show the propagation in the integrated mode MUX with fundamental mode inputs with 0 and π phase difference, respectively. (c) and (d) refer to the DEMUX case, considering as input LP01 and LP11a mode, respectively.

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3. Realization and experimental results

As mentioned in the previous section, the device was designed and fabricated on an InP-based generic technological platform through a Multi-Project Wafer run [23, 24]. A photograph of the realized device is shown in Fig. 3 where the tunable coupler and the phase shifter are highlighted. Input waveguides have a pitch of 250 μm to allow coupling with a commercial 2-fiber array. Spot-size converters (not visible in the photograph) ensure an efficient light coupling between standard SMFs and the single-mode waveguides (width 2 μm), with insertion loss lower than 2 dB and PDL smaller than 0.5 dB [23, 25]. The 13-μm taper can be clearly seen at chip edge on the right. Input and output facets are covered with anti-reflective coating to avoid spurious reflections. Phase shifters are realized with 200-μm-long thermo-optic heaters with a nominal Vπ of about 4.8 V. Integrated PIN photodiodes for direct electrical access to demultiplexed signals have been added to the devices used as DEMUX. The photodiodes have a responsivity of about 0.8 A/W and a 3-dB bandwidth up to 20 GHz.

 figure: Fig. 3

Fig. 3 Photograph of the realized integrated mode (de)multiplexer.

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As a first analysis, we experimentally characterised the functionality of the MUX operation. A single-mode fiber was used to couple light through either S1 or S2 and the output field distribution was measured with an objective aligned with a CCD camera. No polarization controller was used in the setup. Results are shown in Fig. 4(a) for a wavelength λ = 1550 nm. The tunable coupler was set at 3-dB state (ϕA = π/2) applying a voltage VA = 3.1V. As can be clearly seen, when VP = 0 (ϕP = 0) and light is coupled to input port S2, the fundamental mode is excited at the output T while input S1 is mapped on the first-order mode. Mode cross-talk in a SMF was measured as low as −20 dB. With a π shift of the phase controller (ϕP = π, VP = 4.8 V) the configuration is switched: S2 is mapped on the first-order output mode and S1 on the fundamental mode. Since the circuit is completely balanced the operational bandwidth of the MUX is extremely wide. This is demonstrated in Fig. 4(b) where wavelength of the input light was changed to 1480 nm while keeping circuit settings unchanged. As in the previous case, VP = 0 maps input S2 on the fundamental mode and S1 on the first-order mode while VP = 4.8 V switches the MUX configuration.

 figure: Fig. 4

Fig. 4 Mode field distribution at the output of the MUX circuit for different inputs and different voltages applied at the phase controller. VP = 4.8 V allows to obtain a phase shift of ϕP = π. Tunable coupler is set at 3-dB state with VA = 3.1 V (ϕA = π/2). Wavelength of the input light is either (a) 1550 nm or (b) 1480 nm.

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Integrated MUX and DEMUX circuits were hence exploited to realize a full SDM transmission system. The sketch of the experimental setup is shown in Fig. 5. A 2-meter-long graded-index FMF with mode field diameter of 11 μm (differential group delay about 0.08 ps/m, dispersion 20 ps/nm·km, LP01 attenuation 0.198 dB/km and LP11 attenuation 0.191 dB/km, respectively) [26] was coupled to the output Ttx of the MUX and the input Trx of the DEMUX. Angular alignment of the fiber to DEMUX input was carefully controlled in order to ensure good coupling between mode LP11a and first-order input mode of the DEMUX. The estimated coupling efficiency between ports Ttx and Ttx and the FMF is in the order of 6–7 dB for both propagating modes, in a good agreement with BPM simulations. As in the previous case, no polarization controller was used in the setup. Signal at wavelength of 1540 nm was generated and coupled to either MUX’s input S1tx or S2tx through a standard SMF. The MUX configuration was fixed at VA,tx = 3.1 V and VP,tx = 0, mapping input S1tx on the first-order mode and S2tx on the fundamental mode at the MUX’s output Ttx (see Figs. 4(a) and (b)). Acting on the DEMUX it is possible to recover the two input signals as well as perform system reconfiguration. Output signals were measured at the DEMUX’s outputs S1rx and S2rx terminated with integrated PIN photodiodes. All input/output port combinations were investigated while changing the DEMUX setting through the integrated thermo-optic heaters. In particular, the voltage for both the tuneable coupler (VA,rx) and phase controller (VP,rx) of the DEMUX was swept between 2.2 V and 6.2 V while measuring input/output system transmission.

 figure: Fig. 5

Fig. 5 SDM transmission test setup with integrated mode MUX and DEMUX. The demultiplexer output waveguides S1rx and S2rx are equipped with integrated PIN photodiodes.

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Figures 6(a–d) show the measured transmission from inputs S1tx and S2tx to outputs S1rx and S2rx. Colour scale represents the normalized power received at the output photodiodes. In all the considered cases total power loss from MUX inputs to DEMUX outputs is about 30 dB. As can be seen, inputs S1tx and S2tx can be demultiplexed to either S1rx or S2rx exploiting several DEMUX configurations. Considering the case VA,RX = 3.1 V (ϕA,RX = π/2) and VP,RX = 4.5 V (ϕP,RX = π), channel injected at S1tx is demultiplexed at S2rx with an extinction ratio ER,12 = 16.3 dB; in this configuration channel at S2tx is demultiplexed at S1rx with ER,21 = 13.5 dB. A channel cross-talk of −15.4 dB and −14.5 dB is achieved at S1rx and S2rx, respectively. A differential attenuation of less than 1 dB is achieved between the two channels. The demultiplexing of the input channels can be reversed exploiting DEMUX thermo-optic heaters. Keeping for example the phase controller fixed at VP,RX = 4.5 V (ϕP,RX = π) while changing the controller of the tunable coupler at voltage VA,RX = 5.2 V (ϕA,RX = 3π/2), channel at S1tx is routed to S1rx with extinction ratio ER,11 = 16.3 dB while S2tx is demultiplexed at S2rx with ER,22 = 14.5 dB. The measured channel cross-talk is −15.2 dB and −15.6 dB at S1rx and S2rx, respectively. Also in this case differential attenuation between the two channel is smaller than 1 dB. The same demultiplexing can be obtained also configuring the DEMUX with VA,RX = 3.1 V (ϕA,RX = π/2) and VP,RX = 0 (not shown). Table 1 summarises the performance of the integrated (DE)MUX circuits for two demultiplexing configurations. Demultiplexing reconfiguration can be obtained also exploiting the controllers on the MUX circuit instead of changing the DEMUX settings.

 figure: Fig. 6

Fig. 6 (a–d) Normalized transmission from S1tx and S2tx to S1rx and S2rx as function of the voltage applied to DEMUX thermo-optic heaters (VA,rx and VP,rx). The MUX is set at VA,tx = 3.1 V, VP,tx = 0 V for all the reported results.

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Tables Icon

Table 1. Normalized transmission from S1tx and S2rx to S1rx and S2rx for two different DEMUX configurations. Channels cross-talk at the two output photodiodes is reported.

In order to verify the operational bandwidth of the system, the frequency domain response of the SDM transmission was measured at output S2rx. Figure 7 shows the normalized transmission for both inputs when S1tx and S2tx are demultiplexed at S1rx and S2rx, respectively (as in the second column of Table 1). On the measured bandwidth from 1535 nm to 1545 nm the channel attenuation for S2tx is relatively flat with fluctuations smaller than 2.5 dB (shaded area). Cross-talk (S1tx transmission) is lower than −10 dB on the entire bandwidth. A cross-talk of less than −20 dB is achieved on a bandwidth of about 100 GHz with central frequency 1538 nm, where it is as low as −23 dB.

 figure: Fig. 7

Fig. 7 Frequency response at S2rx for both input S1tx and S2tx. Mode MUX and DEMUX are configured in order to demultiplex S2tx at S2rx. The channel cross-talk is lower than −10 dB on the entire 10-nm bandwidth. Channel attenuation fluctuates less than 2.5 dB (shaded area).

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4. SDM transmission results

Figure 8 shows the experimental setup used for SDM trasmission exploiting the integrated mode MUX and DEMUX circuits. Two 10 Gbit/s OOK NRZ channels were generated by splitting data stream from a 10G Cisco SFP+ module (carrier wavelength 1558 nm) and decorrelated by a 10-km-long fiber coil. EDFAs and variable optical attenuators were used to ensure the same power level of 0 dBm on both channels at the chip input. Channels 1 and 2 were injected at ports S1tx and S2tx of the integrated MUX by means of a fiber array equipped with two standard SMFs without a polarization controller. The few-mode fiber was aligned to MUX and DEMUX chips as described in section 3. As in the previous section, mode MUX was set in order to map channel 1 to mode LP11a of the fiber and channel 2 to mode LP01 (VA,tx = 3.1V, VP,tx = 0V). At the receiver, mode LP11a was demultiplexed at S2rx and LP01 at S1rx (VA,rx = 3.1V, VP,rx = 4.5V). This system configuration is the same of the first column of Table 1 and allows to route channel 1 from input S1tx to output S2rx and channel 2 from S2tx to S1rx. At the output of the integrated mode DEMUX, channel 1 was sent into an optical oscilloscope after amplification and filtering (filter bandwidth 0.25 nm). A chip without photodiodes was used for the demultiplexing.

 figure: Fig. 8

Fig. 8 Experimental setup for SDM transmission. Two 10Gbit/s OOK NRZ channels are multiplexed on modes LP01 and LP11a of the few-mode fiber by means of the integrated mode MUX. Integrated mode DEMUX is used at the receiver.

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The eye diagram of channel 1 extracted at the output port S2rx of the mode DEMUX is shown in figure 9 when channel 2 is switched off (a) and when channel 2 is switched on (b). As can be seen, a good eye-opening is preserved with only a small signal degradation on the eye diagram (b) when compared to single channel transmission. The measured eye Q-factor reduces from 5.7 (single channel transmission) to 3.8 (double channel transmission). Similar results were obtained switching channel mapping, that is coupling channel 1 to mode LP01 of the FMF and the interfering channel 2 to mode LP11a.

 figure: Fig. 9

Fig. 9 Eye diagrams of channel 1 when demultiplexed at output port S2rx of the mode DEMUX (a) without channel 2 and (b) with simultaneous transmission of channel 2.

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5. Conclusion

An Indium-Phosphide-based photonic integrated circuit for two-mode multiplexing and demultiplexing was presented and experimentally demonstrated. Integrated mode MUX and DEMUX were simultaneously exploited for the transmission of two 10 Gbit/s channels at the same wavelength and polarization over modes LP01 and LP11a of a few-mode fiber. Integrated devices present a good coupling efficiency with fiber modes with differential losses smaller than 1 dB. A mode excitation cross-talk of −20 dB and a channel cross-talk suppression after fiber propagation and demultiplexing of 15 dB were measured. An operational bandwidth of the transmission system of at least 10 nm was demonstrated. Both mode MUX and DEMUX are fully reconfigurable and allow a dynamic switch of channel routing in the transmission system.

Acknowledgments

The authors gratefully acknowledge OFS (Denmark) for providing the few-mode fiber, Chigo Okonkwo (COBRA Institute, Eindhoven University of Technology) and Francesco Morichetti (Politecnico di Milano) for precious suggestions and hints and Nicola Peserico (Politecnico di Milano) for help in the experiments. The authors thank Franscisco M. Soares, Moritz Baier and Norbert Grote (Fraunhofer Heinrich Hertz Institut) for the fabrication of the devices.

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References

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  1. D. Richardson, J. Fini, and L. Nelson, “Space-division multiplexing in optical fibres,” Nat. Photonics 7, 354–362 (2013).
    [Crossref]
  2. A. Ellis, J. Zhao, and D. Cotter, “Approaching the non-linear Shannon limit,” J. Lightwave Technol. 28, 423–433 (2010).
    [Crossref]
  3. P. Winzer, “Making spatial multiplexing a reality,” Nat. Photonics 8, 345–348 (2014).
    [Crossref]
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2016 (1)

F. Guo, D. Lu, R. Zhang, H. Wang, and C. Ji, “A two-mode (de)multiplexer based on multimode interferometer coupler and y-junction on inp substrate,” IEEE Photon. J. 8, 1–8 (2016).
[Crossref]

2015 (1)

2014 (5)

L. Luo, N. Ophir, C. Chen, L. Gabrielli, C. Poitras, K. Bergmen, and M. Lipson, “WDM-compatible mode-division multiplexing on a silicon chip,” Nat. Communications 5, 3069 (2014).
[Crossref]

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

P. Winzer, “Making spatial multiplexing a reality,” Nat. Photonics 8, 345–348 (2014).
[Crossref]

H. Chen, R. van Uden, C. Okonkwo, and A. Koonen, “Compact spatial multiplexers for mode division multiplexing,” Opt. Express 22, 31582–31594 (2014).
[Crossref]

R. Van Uden, R. Correa, E. Lopez, F. Huijskens, C. Xia, G. Li, A. Schülzgen, H. de Waardt, A. Koonen, and C. Okonkwo, “Ultra-high-density spatial division multiplexing with a few-mode multicore fibre,” Nat. Photonics 8, 865–870 (2014).
[Crossref]

2013 (5)

D. Richardson, J. Fini, and L. Nelson, “Space-division multiplexing in optical fibres,” Nat. Photonics 7, 354–362 (2013).
[Crossref]

D. Miller, “Reconfigurable add-drop multiplexer for spatial modes,” Opt. Express 21, 20220–20229 (2013).
[Crossref] [PubMed]

D. Dai, J. Wang, and Y. Shi, “Silicon mode (de) multiplexer enabling high capacity photonic networks-on-chip with a single-wavelength-carrier light,” Opt. Lett. 38, 1422–1424 (2013).
[Crossref] [PubMed]

Y. Ding, H. Ou, J. Xu, and C. Peucheret, “Silicon photonic integrated circuit mode multiplexer,” IEEE Photon. Technol. Lett. 25, 648–651 (2013).
[Crossref]

H. Chen, V. Sleiffer, B. Snyder, M. Kuschnerov, R. van Uden, Y. Jung, C. Okonkwo, O. Raz, P. O’Brien, H. de Waardt, and T. Koonen, “Demonstration of a photonic integrated mode coupler with MDM and WDM transmission,” IEEE Photon. Technol. Lett. 25, 2039–2042 (2013).
[Crossref]

2012 (5)

2011 (2)

P. Winzer, “Energy-efficient optical transport capacity scaling through spatial multiplexing,” IEEE Photon. Technol. Lett. 13, 851–853 (2011).
[Crossref]

C. Doerr, “Proposed Architecture for MIMO Optical Demultiplexing Using Photonic Integration,” IEEE Photon. Technol. Lett. 23, 1573–1575 (2011).
[Crossref]

2010 (1)

1975 (1)

W. Burns and A. Milton, “Mode conversion in planar-dielectric separating waveguides,” IEEE J. Quantum Electron. 11, 32–39 (1975).
[Crossref]

Achouche, M.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

Al Amin, A.

Alam, S.U.

Ambrosius, H.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

Amezcua Correa, R.

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
[Crossref]

Annoni, A.

F. Morichetti, A. Annoni, S. Grillanda, N. Peserico, M. Carminati, P. Ciccarella, G. Ferrari, E. Guglielmi, M. Sorel, and A. Melloni, “4-Channel All-Optical MIMO Demultiplexing on a Silicon Chip,” in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optical Society of America, 2016), paper Th3E.7.
[Crossref]

Antonio Lopez, J.

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
[Crossref]

Augustin, L.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

Bakker, A.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

Ben Yoo, S.

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
[Crossref]

Bente, E.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

Bergmen, K.

L. Luo, N. Ophir, C. Chen, L. Gabrielli, C. Poitras, K. Bergmen, and M. Lipson, “WDM-compatible mode-division multiplexing on a silicon chip,” Nat. Communications 5, 3069 (2014).
[Crossref]

Bhat, Sr.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

Bitincka, E.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

Bolk, J.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

Broeke, R.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
[Crossref]

Buhl, L.

N. K. Fontaine, C. Doerr, M. Mestre, R. Ryf, P. Winzer, L. Buhl, Y. Sun, X. Jiang, and R. Lingle, “Space-division multiplexing and all-optical MIMO demultiplexing using a photonic integrated circuit,” in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2012), paper PDP5B.1.

Burns, W.

W. Burns and A. Milton, “Mode conversion in planar-dielectric separating waveguides,” IEEE J. Quantum Electron. 11, 32–39 (1975).
[Crossref]

Carminati, M.

F. Morichetti, A. Annoni, S. Grillanda, N. Peserico, M. Carminati, P. Ciccarella, G. Ferrari, E. Guglielmi, M. Sorel, and A. Melloni, “4-Channel All-Optical MIMO Demultiplexing on a Silicon Chip,” in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optical Society of America, 2016), paper Th3E.7.
[Crossref]

Chen, C.

L. Luo, N. Ophir, C. Chen, L. Gabrielli, C. Poitras, K. Bergmen, and M. Lipson, “WDM-compatible mode-division multiplexing on a silicon chip,” Nat. Communications 5, 3069 (2014).
[Crossref]

Chen, H.

H. Chen, R. van Uden, C. Okonkwo, and A. Koonen, “Compact spatial multiplexers for mode division multiplexing,” Opt. Express 22, 31582–31594 (2014).
[Crossref]

H. Chen, V. Sleiffer, B. Snyder, M. Kuschnerov, R. van Uden, Y. Jung, C. Okonkwo, O. Raz, P. O’Brien, H. de Waardt, and T. Koonen, “Demonstration of a photonic integrated mode coupler with MDM and WDM transmission,” IEEE Photon. Technol. Lett. 25, 2039–2042 (2013).
[Crossref]

A. Koonen, H. Chen, H. van den Boom, and O. Raz, “Silicon Photonic Integrated Mode Multiplexer and Demul-tiplexer,” IEEE Photon. Technol. Lett. 24, 1961–1964 (2012).
[Crossref]

V.A.J.M. Sleiffer, Y. Jung, V. Veljanovski, R.G.H. van Uden, M. Kuschnerov, H. Chen, B. Inan, L. Nielsen, Y. Sun, D.J. Richardson, S.U. Alam, F. Poletti, J.K. Sahu, A. Dhar, A.M.J. Koonen, B. Corbett, R. Winfield, A.D. Ellis, and H. de Waardt, “73.7 Tb/s (96 × 3 × 256-Gb/s) mode-division-multiplexed DP-16QAM transmission with inline MM-EDFA,” Opt. Express 20, B428–B438 (2012).
[Crossref] [PubMed]

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
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Chen, X.

Ciccarella, P.

F. Morichetti, A. Annoni, S. Grillanda, N. Peserico, M. Carminati, P. Ciccarella, G. Ferrari, E. Guglielmi, M. Sorel, and A. Melloni, “4-Channel All-Optical MIMO Demultiplexing on a Silicon Chip,” in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optical Society of America, 2016), paper Th3E.7.
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Corbett, B.

Corradi, A.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Correa, R.

R. Van Uden, R. Correa, E. Lopez, F. Huijskens, C. Xia, G. Li, A. Schülzgen, H. de Waardt, A. Koonen, and C. Okonkwo, “Ultra-high-density spatial division multiplexing with a few-mode multicore fibre,” Nat. Photonics 8, 865–870 (2014).
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Cotter, D.

D’Agostino, D.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Dabbs, A.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Dai, D.

de Vries, T.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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de Waardt, H.

R. Van Uden, R. Correa, E. Lopez, F. Huijskens, C. Xia, G. Li, A. Schülzgen, H. de Waardt, A. Koonen, and C. Okonkwo, “Ultra-high-density spatial division multiplexing with a few-mode multicore fibre,” Nat. Photonics 8, 865–870 (2014).
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H. Chen, V. Sleiffer, B. Snyder, M. Kuschnerov, R. van Uden, Y. Jung, C. Okonkwo, O. Raz, P. O’Brien, H. de Waardt, and T. Koonen, “Demonstration of a photonic integrated mode coupler with MDM and WDM transmission,” IEEE Photon. Technol. Lett. 25, 2039–2042 (2013).
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V.A.J.M. Sleiffer, Y. Jung, V. Veljanovski, R.G.H. van Uden, M. Kuschnerov, H. Chen, B. Inan, L. Nielsen, Y. Sun, D.J. Richardson, S.U. Alam, F. Poletti, J.K. Sahu, A. Dhar, A.M.J. Koonen, B. Corbett, R. Winfield, A.D. Ellis, and H. de Waardt, “73.7 Tb/s (96 × 3 × 256-Gb/s) mode-division-multiplexed DP-16QAM transmission with inline MM-EDFA,” Opt. Express 20, B428–B438 (2012).
[Crossref] [PubMed]

Debregeas, H.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Delbue, R.

R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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Dhar, A.

Ding, Y.

Y. Ding, H. Ou, J. Xu, and C. Peucheret, “Silicon photonic integrated circuit mode multiplexer,” IEEE Photon. Technol. Lett. 25, 648–651 (2013).
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Doerr, C.

C. Doerr, “Proposed Architecture for MIMO Optical Demultiplexing Using Photonic Integration,” IEEE Photon. Technol. Lett. 23, 1573–1575 (2011).
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N. K. Fontaine, C. Doerr, M. Mestre, R. Ryf, P. Winzer, L. Buhl, Y. Sun, X. Jiang, and R. Lingle, “Space-division multiplexing and all-optical MIMO demultiplexing using a photonic integrated circuit,” in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2012), paper PDP5B.1.

Dzibrou, D.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Ellis, A.

Ellis, A.D.

Ercan, B.

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
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Essiambre, R.

R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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Felicetti, M.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Ferrari, G.

F. Morichetti, A. Annoni, S. Grillanda, N. Peserico, M. Carminati, P. Ciccarella, G. Ferrari, E. Guglielmi, M. Sorel, and A. Melloni, “4-Channel All-Optical MIMO Demultiplexing on a Silicon Chip,” in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optical Society of America, 2016), paper Th3E.7.
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Fini, J.

D. Richardson, J. Fini, and L. Nelson, “Space-division multiplexing in optical fibres,” Nat. Photonics 7, 354–362 (2013).
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Firth, P.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Fontaine, N.

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
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Fontaine, N. K.

N. K. Fontaine, C. Doerr, M. Mestre, R. Ryf, P. Winzer, L. Buhl, Y. Sun, X. Jiang, and R. Lingle, “Space-division multiplexing and all-optical MIMO demultiplexing using a photonic integrated circuit,” in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2012), paper PDP5B.1.

Gabrielli, L.

L. Luo, N. Ophir, C. Chen, L. Gabrielli, C. Poitras, K. Bergmen, and M. Lipson, “WDM-compatible mode-division multiplexing on a silicon chip,” Nat. Communications 5, 3069 (2014).
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Gallagher, D.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Geluk, E.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Gentner, J.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Gilardi, G.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Gnauck, A.

R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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Grillanda, S.

F. Morichetti, A. Annoni, S. Grillanda, N. Peserico, M. Carminati, P. Ciccarella, G. Ferrari, E. Guglielmi, M. Sorel, and A. Melloni, “4-Channel All-Optical MIMO Demultiplexing on a Silicon Chip,” in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optical Society of America, 2016), paper Th3E.7.
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Grote, N.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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F. Soares, K. Janiak, J. Kreissl, M. Moehrle, and N. Grote, “Semi-insulating substrate based generic InP photonic integration platform,” in Integrated Photonics: Materials, Devices, and Applications II, Proc. SPIE8767, 87670M (2013)

Gruner-Nielsen, L.

L. Gruner-Nielsen, Y. Sun, J. Nicholson, D. Jakobsen, K. G. Jespersen, R. Lingle, and B. Palsdottir, “Few Mode Transmission Fiber With Low DGD, Low Mode Coupling, and Low Loss,” J. Lightwave Technol. 30, 3693–3698 (2012).
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N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
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Guan, B.

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
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Guglielmi, E.

F. Morichetti, A. Annoni, S. Grillanda, N. Peserico, M. Carminati, P. Ciccarella, G. Ferrari, E. Guglielmi, M. Sorel, and A. Melloni, “4-Channel All-Optical MIMO Demultiplexing on a Silicon Chip,” in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optical Society of America, 2016), paper Th3E.7.
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Guo, F.

F. Guo, D. Lu, R. Zhang, H. Wang, and C. Ji, “A two-mode (de)multiplexer based on multimode interferometer coupler and y-junction on inp substrate,” IEEE Photon. J. 8, 1–8 (2016).
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Heiss, D.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Huijskens, F.

R. Van Uden, R. Correa, E. Lopez, F. Huijskens, C. Xia, G. Li, A. Schülzgen, H. de Waardt, A. Koonen, and C. Okonkwo, “Ultra-high-density spatial division multiplexing with a few-mode multicore fibre,” Nat. Photonics 8, 865–870 (2014).
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N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
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R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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R. Van Uden, R. Correa, E. Lopez, F. Huijskens, C. Xia, G. Li, A. Schülzgen, H. de Waardt, A. Koonen, and C. Okonkwo, “Ultra-high-density spatial division multiplexing with a few-mode multicore fibre,” Nat. Photonics 8, 865–870 (2014).
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H. Chen, R. van Uden, C. Okonkwo, and A. Koonen, “Compact spatial multiplexers for mode division multiplexing,” Opt. Express 22, 31582–31594 (2014).
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H. Chen, V. Sleiffer, B. Snyder, M. Kuschnerov, R. van Uden, Y. Jung, C. Okonkwo, O. Raz, P. O’Brien, H. de Waardt, and T. Koonen, “Demonstration of a photonic integrated mode coupler with MDM and WDM transmission,” IEEE Photon. Technol. Lett. 25, 2039–2042 (2013).
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L. Luo, N. Ophir, C. Chen, L. Gabrielli, C. Poitras, K. Bergmen, and M. Lipson, “WDM-compatible mode-division multiplexing on a silicon chip,” Nat. Communications 5, 3069 (2014).
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Peckham, D.W.

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Poletti, F.

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R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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Raz, O.

H. Chen, V. Sleiffer, B. Snyder, M. Kuschnerov, R. van Uden, Y. Jung, C. Okonkwo, O. Raz, P. O’Brien, H. de Waardt, and T. Koonen, “Demonstration of a photonic integrated mode coupler with MDM and WDM transmission,” IEEE Photon. Technol. Lett. 25, 2039–2042 (2013).
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A. Koonen, H. Chen, H. van den Boom, and O. Raz, “Silicon Photonic Integrated Mode Multiplexer and Demul-tiplexer,” IEEE Photon. Technol. Lett. 24, 1961–1964 (2012).
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Roelkens, G.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Ryf, R.

R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
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N. K. Fontaine, C. Doerr, M. Mestre, R. Ryf, P. Winzer, L. Buhl, Y. Sun, X. Jiang, and R. Lingle, “Space-division multiplexing and all-optical MIMO demultiplexing using a photonic integrated circuit,” in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2012), paper PDP5B.1.

Sahu, J.K.

Santos, R.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Schell, M.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Schmidt, C.

R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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Schülzgen, A.

R. Van Uden, R. Correa, E. Lopez, F. Huijskens, C. Xia, G. Li, A. Schülzgen, H. de Waardt, A. Koonen, and C. Okonkwo, “Ultra-high-density spatial division multiplexing with a few-mode multicore fibre,” Nat. Photonics 8, 865–870 (2014).
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Scott, R.

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
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Shi, Y.

Shieh, W.

Sleiffer, V.

H. Chen, V. Sleiffer, B. Snyder, M. Kuschnerov, R. van Uden, Y. Jung, C. Okonkwo, O. Raz, P. O’Brien, H. de Waardt, and T. Koonen, “Demonstration of a photonic integrated mode coupler with MDM and WDM transmission,” IEEE Photon. Technol. Lett. 25, 2039–2042 (2013).
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Sleiffer, V.A.J.M.

Smalbrugge, B.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Smit, M.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Snyder, B.

H. Chen, V. Sleiffer, B. Snyder, M. Kuschnerov, R. van Uden, Y. Jung, C. Okonkwo, O. Raz, P. O’Brien, H. de Waardt, and T. Koonen, “Demonstration of a photonic integrated mode coupler with MDM and WDM transmission,” IEEE Photon. Technol. Lett. 25, 2039–2042 (2013).
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Soares, F.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Sorel, M.

F. Morichetti, A. Annoni, S. Grillanda, N. Peserico, M. Carminati, P. Ciccarella, G. Ferrari, E. Guglielmi, M. Sorel, and A. Melloni, “4-Channel All-Optical MIMO Demultiplexing on a Silicon Chip,” in Optical Fiber Communication Conference, OSA Technical Digest (online) (Optical Society of America, 2016), paper Th3E.7.
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Stabile, P.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Stopinski, S.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Sun, Y.

L. Gruner-Nielsen, Y. Sun, J. Nicholson, D. Jakobsen, K. G. Jespersen, R. Lingle, and B. Palsdottir, “Few Mode Transmission Fiber With Low DGD, Low Mode Coupling, and Low Loss,” J. Lightwave Technol. 30, 3693–3698 (2012).
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V.A.J.M. Sleiffer, Y. Jung, V. Veljanovski, R.G.H. van Uden, M. Kuschnerov, H. Chen, B. Inan, L. Nielsen, Y. Sun, D.J. Richardson, S.U. Alam, F. Poletti, J.K. Sahu, A. Dhar, A.M.J. Koonen, B. Corbett, R. Winfield, A.D. Ellis, and H. de Waardt, “73.7 Tb/s (96 × 3 × 256-Gb/s) mode-division-multiplexed DP-16QAM transmission with inline MM-EDFA,” Opt. Express 20, B428–B438 (2012).
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R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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N. K. Fontaine, C. Doerr, M. Mestre, R. Ryf, P. Winzer, L. Buhl, Y. Sun, X. Jiang, and R. Lingle, “Space-division multiplexing and all-optical MIMO demultiplexing using a photonic integrated circuit,” in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2012), paper PDP5B.1.

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
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Sureka, A.

R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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Tahvili, S.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Thijs, P.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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van den Boom, H.

A. Koonen, H. Chen, H. van den Boom, and O. Raz, “Silicon Photonic Integrated Mode Multiplexer and Demul-tiplexer,” IEEE Photon. Technol. Lett. 24, 1961–1964 (2012).
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van der Tol, J.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Van Uden, R.

R. Van Uden, R. Correa, E. Lopez, F. Huijskens, C. Xia, G. Li, A. Schülzgen, H. de Waardt, A. Koonen, and C. Okonkwo, “Ultra-high-density spatial division multiplexing with a few-mode multicore fibre,” Nat. Photonics 8, 865–870 (2014).
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H. Chen, R. van Uden, C. Okonkwo, and A. Koonen, “Compact spatial multiplexers for mode division multiplexing,” Opt. Express 22, 31582–31594 (2014).
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H. Chen, V. Sleiffer, B. Snyder, M. Kuschnerov, R. van Uden, Y. Jung, C. Okonkwo, O. Raz, P. O’Brien, H. de Waardt, and T. Koonen, “Demonstration of a photonic integrated mode coupler with MDM and WDM transmission,” IEEE Photon. Technol. Lett. 25, 2039–2042 (2013).
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van Uden, R.G.H.

van Veldhoven, R.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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Velazquez, B.

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Wonfor, A.

M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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R. Van Uden, R. Correa, E. Lopez, F. Huijskens, C. Xia, G. Li, A. Schülzgen, H. de Waardt, A. Koonen, and C. Okonkwo, “Ultra-high-density spatial division multiplexing with a few-mode multicore fibre,” Nat. Photonics 8, 865–870 (2014).
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Ye, J.

Zhang, R.

F. Guo, D. Lu, R. Zhang, H. Wang, and C. Ji, “A two-mode (de)multiplexer based on multimode interferometer coupler and y-junction on inp substrate,” IEEE Photon. J. 8, 1–8 (2016).
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M. Smit, X. Leijtens, H. Ambrosius, E. Bente, J. van der Tol, B. Smalbrugge, T. de Vries, E. Geluk, J. Bolk, R. van Veldhoven, L. Augustin, P. Thijs, D. D’Agostino, H. Rabbani, K. Lawniczuk, S. Stopinski, S. Tahvili, A. Corradi, E. Kleijn, D. Dzibrou, M. Felicetti, E. Bitincka, V. Moskalenko, J. Zhao, R. Santos, G. Gilardi, W. Yao, K. Williams, P. Stabile, P. Kuindersma, J. Pello, Sr. Bhat, Y. Jiao, D. Heiss, G. Roelkens, M. Wale, P. Firth, F. Soares, N. Grote, M. Schell, H. Debregeas, M. Achouche, J. Gentner, A. Bakker, T. Korthorst, D. Gallagher, A. Dabbs, A. Melloni, F. Morichetti, D. Melati, A. Wonfor, R. Penty, R. Broeke, B. Musk, and D. Robbins, “An introduction to InP-based generic integration technology,” Semicond. Sci. Tech. 29, 083001 (2014).
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F. Guo, D. Lu, R. Zhang, H. Wang, and C. Ji, “A two-mode (de)multiplexer based on multimode interferometer coupler and y-junction on inp substrate,” IEEE Photon. J. 8, 1–8 (2016).
[Crossref]

IEEE Photon. Technol. Lett. (6)

P. Winzer, “Energy-efficient optical transport capacity scaling through spatial multiplexing,” IEEE Photon. Technol. Lett. 13, 851–853 (2011).
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R. Ryf, M. Mestre, S. Randel, C. Schmidt, A. Gnauck, R. Essiambre, P. Winzer, R. Delbue, P. Pupalaikis, A. Sureka, Y. Sun, X. Jiang, D.W. Peckham, A. McCurdy, and R. Lingle, “Mode-multiplexed transmission over a 209-km DGD-compensated hybrid few-mode fiber span,” IEEE Photon. Technol. Lett. 24, 1965–1968 (2012).
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A. Koonen, H. Chen, H. van den Boom, and O. Raz, “Silicon Photonic Integrated Mode Multiplexer and Demul-tiplexer,” IEEE Photon. Technol. Lett. 24, 1961–1964 (2012).
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Y. Ding, H. Ou, J. Xu, and C. Peucheret, “Silicon photonic integrated circuit mode multiplexer,” IEEE Photon. Technol. Lett. 25, 648–651 (2013).
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H. Chen, V. Sleiffer, B. Snyder, M. Kuschnerov, R. van Uden, Y. Jung, C. Okonkwo, O. Raz, P. O’Brien, H. de Waardt, and T. Koonen, “Demonstration of a photonic integrated mode coupler with MDM and WDM transmission,” IEEE Photon. Technol. Lett. 25, 2039–2042 (2013).
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Opt. Express (5)

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JePPIX, http://www.jeppix.eu .

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N. K. Fontaine, C. Doerr, M. Mestre, R. Ryf, P. Winzer, L. Buhl, Y. Sun, X. Jiang, and R. Lingle, “Space-division multiplexing and all-optical MIMO demultiplexing using a photonic integrated circuit,” in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2012), paper PDP5B.1.

N. Fontaine, R. Ryf, H. Chen, B. Velazquez, J. Antonio Lopez, R. Amezcua Correa, B. Guan, B. Ercan, R. Scott, S. Ben Yoo, L. Gruner-Nielsen, Y. Sun, and R. J. Lingle, “30X30 MIMO transmission over 15 spatial modes”, in Optical Fiber Communication Conference Post Deadline Papers, OSA Technical Digest (online) (Optical Society of America, 2015), paper Th5C.1.
[Crossref]

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Figures (9)

Fig. 1
Fig. 1 (a) Schematic of the integrated mode (de)multiplexer. Two single mode waveguides are coupled to the fundamental and first higher order mode of a two-mode waveguide through a tuneable, linear, and fully reconfigurable circuit. (b) Cross-section of the InP-based waveguides exploited in this work.
Fig. 2
Fig. 2 Propagation simulation through the last part of the integrated mode (DE)MUX, from the phase controller to port T. The simulation is based on the Beam Propagation Method and color scale is normalized. Z-axis refers the direction of propagation while X-axis refers the cross-section view. (a) and (b) show the propagation in the integrated mode MUX with fundamental mode inputs with 0 and π phase difference, respectively. (c) and (d) refer to the DEMUX case, considering as input LP01 and LP11a mode, respectively.
Fig. 3
Fig. 3 Photograph of the realized integrated mode (de)multiplexer.
Fig. 4
Fig. 4 Mode field distribution at the output of the MUX circuit for different inputs and different voltages applied at the phase controller. VP = 4.8 V allows to obtain a phase shift of ϕP = π. Tunable coupler is set at 3-dB state with VA = 3.1 V (ϕA = π/2). Wavelength of the input light is either (a) 1550 nm or (b) 1480 nm.
Fig. 5
Fig. 5 SDM transmission test setup with integrated mode MUX and DEMUX. The demultiplexer output waveguides S1rx and S2rx are equipped with integrated PIN photodiodes.
Fig. 6
Fig. 6 (a–d) Normalized transmission from S1tx and S2tx to S1rx and S2rx as function of the voltage applied to DEMUX thermo-optic heaters (VA,rx and VP,rx). The MUX is set at VA,tx = 3.1 V, VP,tx = 0 V for all the reported results.
Fig. 7
Fig. 7 Frequency response at S2rx for both input S1tx and S2tx. Mode MUX and DEMUX are configured in order to demultiplex S2tx at S2rx. The channel cross-talk is lower than −10 dB on the entire 10-nm bandwidth. Channel attenuation fluctuates less than 2.5 dB (shaded area).
Fig. 8
Fig. 8 Experimental setup for SDM transmission. Two 10Gbit/s OOK NRZ channels are multiplexed on modes LP01 and LP11a of the few-mode fiber by means of the integrated mode MUX. Integrated mode DEMUX is used at the receiver.
Fig. 9
Fig. 9 Eye diagrams of channel 1 when demultiplexed at output port S2rx of the mode DEMUX (a) without channel 2 and (b) with simultaneous transmission of channel 2.

Tables (1)

Tables Icon

Table 1 Normalized transmission from S1tx and S2rx to S1rx and S2rx for two different DEMUX configurations. Channels cross-talk at the two output photodiodes is reported.

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