Abstract

A novel coherent multi-level OTDM transmission scheme is presented by using an RZ-CW conversion technique in a coherent receiver, in which the transmitted coherent RZ pulses are OTDM demultiplexed and converted into a CW signals for demodulation with a CW-LO. This scheme enables us to achieve a high SNR demodulation and demultiplexing performance even for ultrahigh-speed OTDM signals with ultra multi-level modulation, which would be difficult to realize with a conventional scheme of simultaneous demodulation and demultiplexing using a pulsed-LO. The advantage of this scheme is successfully demonstrated with 10 Gsymbol/s, 4- and 8-OTDM, 32-RZ/QAM demodulation experiments.

© 2011 OSA

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  1. C. Zhang, Y. Mori, M. Usui, K. Igarashi, K. Katoh, and K. Kikuchi, “Straight-line 1,073-km transmission of 640-Gbit/s dual-polarization QPSK signals on a single carrier,” in 35th European Conference on Optical Communication, 2009. ECOC '09(2009), postdeadline paper PD2. 8.
  2. C. Schmidt-Langhorst, R. Ludwig, L. Molle, D. Gros, R. Freund, and C. Schubert, “Terabit/s single-carrier transmission system based on coherent time-division demultiplexing,” in Optical Fiber Communication Conference, OSA Technical Digest (CD) (Optical Society of America, 2010), paper OThV3.
  3. K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, “Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique,” IEEE Photon. Technol. Lett. 22(8), 562–564 (2010).
    [CrossRef]
  4. F. Ito, “Interferometric demultiplexing experiment using linear coherent correlation with modulated local oscillator,” Electron. Lett. 32(1), 14–15 (1996).
    [CrossRef]
  5. T. Richter, E. Palushani, C. Schmidt-Langhorst, M. Nölle, R. Ludwig, and C. Schubert, “Single wavelength channel 10.2 Tb/s TDM-data capacity using 16-QAM and coherent detection,” in Optical Fiber Communication Conference, OSA Technical Digest (CD) (Optical Society of America, 2011), paper PDPA9.
  6. K. Kasai, A. Suzuki, M. Yoshida, and M. Nakazawa, “Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser,” IEICE Electron. Express 3(22), 487–492 (2006).
    [CrossRef]
  7. T. Sakamoto, T. Kawanishi, and M. Izutsu, “Asymptotic formalism for ultraflat optical frequency comb generation using a Mach-Zehnder modulator,” Opt. Lett. 32(11), 1515–1517 (2007).
    [CrossRef] [PubMed]
  8. M. Nakazawa, T. Hirooka, F. Futami, and S. Watanabe, “Ideal distortion-free transmission using optical Fourier transformation and Fourier transform-limited optical pulses,” IEEE Photon. Technol. Lett. 16(4), 1059–1061 (2004).
    [CrossRef]
  9. P. Guan, H. C. H. Mulvad, K. Kasai, T. Hirooka, and M. Nakazawa, “High time-resolution 640-Gb/s clock recovery using time-domain optical Fourier transformation and narrowband optical filter,” IEEE Photon. Technol. Lett. 22(23), 1735–1737 (2010).
    [CrossRef]
  10. H. C. H. Mulvad, E. Palushani, H. Hu, H. Ji, M. Galili, A. T. Clausen, M. Pu, K. Yvind, J. M. Hvam, P. Jeppesen, and L. K. Oxenlowe, “Ultra-high-speed optical serial-to-parallel data conversion in a silicon nanowire,” in 37th European Conference and Exposition on Optical Communications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper Th.13.A.2.
  11. C. Boerner, V. Marembert, S. Ferber, C. Schubert, C. Schmidt-Langhorst, R. Ludwig, and H. G. Weber, “320 Gbit/s clock recovery with electro-optical PLL using a bidirectionally operated electroabsorption modulator as phase comparator,” in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, Technical Digest (CD) (Optical Society of America, 2005), paper OTuO3.

2010 (2)

K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, “Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique,” IEEE Photon. Technol. Lett. 22(8), 562–564 (2010).
[CrossRef]

P. Guan, H. C. H. Mulvad, K. Kasai, T. Hirooka, and M. Nakazawa, “High time-resolution 640-Gb/s clock recovery using time-domain optical Fourier transformation and narrowband optical filter,” IEEE Photon. Technol. Lett. 22(23), 1735–1737 (2010).
[CrossRef]

2007 (1)

2006 (1)

K. Kasai, A. Suzuki, M. Yoshida, and M. Nakazawa, “Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser,” IEICE Electron. Express 3(22), 487–492 (2006).
[CrossRef]

2004 (1)

M. Nakazawa, T. Hirooka, F. Futami, and S. Watanabe, “Ideal distortion-free transmission using optical Fourier transformation and Fourier transform-limited optical pulses,” IEEE Photon. Technol. Lett. 16(4), 1059–1061 (2004).
[CrossRef]

1996 (1)

F. Ito, “Interferometric demultiplexing experiment using linear coherent correlation with modulated local oscillator,” Electron. Lett. 32(1), 14–15 (1996).
[CrossRef]

Futami, F.

M. Nakazawa, T. Hirooka, F. Futami, and S. Watanabe, “Ideal distortion-free transmission using optical Fourier transformation and Fourier transform-limited optical pulses,” IEEE Photon. Technol. Lett. 16(4), 1059–1061 (2004).
[CrossRef]

Guan, P.

P. Guan, H. C. H. Mulvad, K. Kasai, T. Hirooka, and M. Nakazawa, “High time-resolution 640-Gb/s clock recovery using time-domain optical Fourier transformation and narrowband optical filter,” IEEE Photon. Technol. Lett. 22(23), 1735–1737 (2010).
[CrossRef]

K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, “Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique,” IEEE Photon. Technol. Lett. 22(8), 562–564 (2010).
[CrossRef]

Hirooka, T.

K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, “Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique,” IEEE Photon. Technol. Lett. 22(8), 562–564 (2010).
[CrossRef]

P. Guan, H. C. H. Mulvad, K. Kasai, T. Hirooka, and M. Nakazawa, “High time-resolution 640-Gb/s clock recovery using time-domain optical Fourier transformation and narrowband optical filter,” IEEE Photon. Technol. Lett. 22(23), 1735–1737 (2010).
[CrossRef]

M. Nakazawa, T. Hirooka, F. Futami, and S. Watanabe, “Ideal distortion-free transmission using optical Fourier transformation and Fourier transform-limited optical pulses,” IEEE Photon. Technol. Lett. 16(4), 1059–1061 (2004).
[CrossRef]

Ito, F.

F. Ito, “Interferometric demultiplexing experiment using linear coherent correlation with modulated local oscillator,” Electron. Lett. 32(1), 14–15 (1996).
[CrossRef]

Izutsu, M.

Kasai, K.

K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, “Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique,” IEEE Photon. Technol. Lett. 22(8), 562–564 (2010).
[CrossRef]

P. Guan, H. C. H. Mulvad, K. Kasai, T. Hirooka, and M. Nakazawa, “High time-resolution 640-Gb/s clock recovery using time-domain optical Fourier transformation and narrowband optical filter,” IEEE Photon. Technol. Lett. 22(23), 1735–1737 (2010).
[CrossRef]

K. Kasai, A. Suzuki, M. Yoshida, and M. Nakazawa, “Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser,” IEICE Electron. Express 3(22), 487–492 (2006).
[CrossRef]

Kawanishi, T.

Mulvad, H. C. H.

P. Guan, H. C. H. Mulvad, K. Kasai, T. Hirooka, and M. Nakazawa, “High time-resolution 640-Gb/s clock recovery using time-domain optical Fourier transformation and narrowband optical filter,” IEEE Photon. Technol. Lett. 22(23), 1735–1737 (2010).
[CrossRef]

Nakazawa, M.

P. Guan, H. C. H. Mulvad, K. Kasai, T. Hirooka, and M. Nakazawa, “High time-resolution 640-Gb/s clock recovery using time-domain optical Fourier transformation and narrowband optical filter,” IEEE Photon. Technol. Lett. 22(23), 1735–1737 (2010).
[CrossRef]

K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, “Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique,” IEEE Photon. Technol. Lett. 22(8), 562–564 (2010).
[CrossRef]

K. Kasai, A. Suzuki, M. Yoshida, and M. Nakazawa, “Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser,” IEICE Electron. Express 3(22), 487–492 (2006).
[CrossRef]

M. Nakazawa, T. Hirooka, F. Futami, and S. Watanabe, “Ideal distortion-free transmission using optical Fourier transformation and Fourier transform-limited optical pulses,” IEEE Photon. Technol. Lett. 16(4), 1059–1061 (2004).
[CrossRef]

Omiya, T.

K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, “Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique,” IEEE Photon. Technol. Lett. 22(8), 562–564 (2010).
[CrossRef]

Sakamoto, T.

Suzuki, A.

K. Kasai, A. Suzuki, M. Yoshida, and M. Nakazawa, “Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser,” IEICE Electron. Express 3(22), 487–492 (2006).
[CrossRef]

Watanabe, S.

M. Nakazawa, T. Hirooka, F. Futami, and S. Watanabe, “Ideal distortion-free transmission using optical Fourier transformation and Fourier transform-limited optical pulses,” IEEE Photon. Technol. Lett. 16(4), 1059–1061 (2004).
[CrossRef]

Yoshida, M.

K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, “Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique,” IEEE Photon. Technol. Lett. 22(8), 562–564 (2010).
[CrossRef]

K. Kasai, A. Suzuki, M. Yoshida, and M. Nakazawa, “Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser,” IEICE Electron. Express 3(22), 487–492 (2006).
[CrossRef]

Electron. Lett. (1)

F. Ito, “Interferometric demultiplexing experiment using linear coherent correlation with modulated local oscillator,” Electron. Lett. 32(1), 14–15 (1996).
[CrossRef]

IEEE Photon. Technol. Lett. (3)

M. Nakazawa, T. Hirooka, F. Futami, and S. Watanabe, “Ideal distortion-free transmission using optical Fourier transformation and Fourier transform-limited optical pulses,” IEEE Photon. Technol. Lett. 16(4), 1059–1061 (2004).
[CrossRef]

P. Guan, H. C. H. Mulvad, K. Kasai, T. Hirooka, and M. Nakazawa, “High time-resolution 640-Gb/s clock recovery using time-domain optical Fourier transformation and narrowband optical filter,” IEEE Photon. Technol. Lett. 22(23), 1735–1737 (2010).
[CrossRef]

K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, “Single-channel 400 Gbit/s, OTDM-32 RZ/QAM coherent transmission over 225 km using an optical phase-locked loop technique,” IEEE Photon. Technol. Lett. 22(8), 562–564 (2010).
[CrossRef]

IEICE Electron. Express (1)

K. Kasai, A. Suzuki, M. Yoshida, and M. Nakazawa, “Performance improvement of an acetylene (C2H2) frequency-stabilized fiber laser,” IEICE Electron. Express 3(22), 487–492 (2006).
[CrossRef]

Opt. Lett. (1)

Other (5)

H. C. H. Mulvad, E. Palushani, H. Hu, H. Ji, M. Galili, A. T. Clausen, M. Pu, K. Yvind, J. M. Hvam, P. Jeppesen, and L. K. Oxenlowe, “Ultra-high-speed optical serial-to-parallel data conversion in a silicon nanowire,” in 37th European Conference and Exposition on Optical Communications, OSA Technical Digest (CD) (Optical Society of America, 2011), paper Th.13.A.2.

C. Boerner, V. Marembert, S. Ferber, C. Schubert, C. Schmidt-Langhorst, R. Ludwig, and H. G. Weber, “320 Gbit/s clock recovery with electro-optical PLL using a bidirectionally operated electroabsorption modulator as phase comparator,” in Optical Fiber Communication Conference and Exposition and The National Fiber Optic Engineers Conference, Technical Digest (CD) (Optical Society of America, 2005), paper OTuO3.

T. Richter, E. Palushani, C. Schmidt-Langhorst, M. Nölle, R. Ludwig, and C. Schubert, “Single wavelength channel 10.2 Tb/s TDM-data capacity using 16-QAM and coherent detection,” in Optical Fiber Communication Conference, OSA Technical Digest (CD) (Optical Society of America, 2011), paper PDPA9.

C. Zhang, Y. Mori, M. Usui, K. Igarashi, K. Katoh, and K. Kikuchi, “Straight-line 1,073-km transmission of 640-Gbit/s dual-polarization QPSK signals on a single carrier,” in 35th European Conference on Optical Communication, 2009. ECOC '09(2009), postdeadline paper PD2. 8.

C. Schmidt-Langhorst, R. Ludwig, L. Molle, D. Gros, R. Freund, and C. Schubert, “Terabit/s single-carrier transmission system based on coherent time-division demultiplexing,” in Optical Fiber Communication Conference, OSA Technical Digest (CD) (Optical Society of America, 2010), paper OThV3.

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Figures (11)

Fig. 1
Fig. 1

Block diagram of conventional coherent homodyne-detection circuit.

Fig. 2
Fig. 2

Base-band data signal obtained with a CW carrier and with an RZ carrier.

Fig. 3
Fig. 3

Block diagram of coherent OTDM transmission with RZ-CW conversion scheme.

Fig. 4
Fig. 4

Experimental setup for demonstration of RZ-CW conversion scheme (a), and detailed configuration of pulse carving circuit using an LN phase modulator (b) and an optical comb generator (c).

Fig. 5
Fig. 5

Optical spectra and pulse waveforms (a) before RZ-CW conversion, (b) after RZ-CW conversion when an RZ pulse is generated with an LN phase modulator.

Fig. 6
Fig. 6

Optical spectra and pulse waveforms (a) before RZ-CW conversion, (b) after RZ-CW conversion when an RZ pulse is generated with an optical comb generator.

Fig. 7
Fig. 7

Experimental setup for 10 Gsymbol/s, 4- and 8-OTDM, 32 RZ/QAM modulation/demodulation with an RZ-CW conversion scheme.

Fig. 8
Fig. 8

Optical spectrum and pulse waveform of (a) 40 and (b) 80 Gsymbol/s, 32 RZ/QAM data.

Fig. 9
Fig. 9

Configuration of control pulse generation circuit.

Fig. 10
Fig. 10

Optical spectra (0.01 nm resolution) of 10 Gsymbol/s, 32 RZ/QAM signal before and after RZ-CW conversion obtained with (a)4 and (b)8-OTDM signal.

Fig. 11
Fig. 11

BER characteristics of 10 Gsymbol/s, 32 RZ/QAM signal.

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