Abstract

We report the design, fabrication and characterization of an integrated frequency discriminator on InP technology for microwave photonic phase modulated links. The optical chip is, to the best of our knowledge, the first reported in an active platform and the first to include the optical detectors. The discriminator, designed as a linear filter in intensity, features preliminary SFDR values the range between 67 and 79 dB.Hz2/3 for signal frequencies in the range of 5-9 GHz limited, in principle, by the high value of the optical losses arising from the use of several free space coupling devices in our experimental setup. As discussed, these losses can be readily reduced by the use of integrated spot-size converters improving the SFDR by 17.3 dB (84-96 dB.Hz2/3). Further increase up to a range of (104-116 dB.Hz2/3) is possible by reducing the system noise eliminating the EDFA employed in the setup and using a commercially available laser source providing higher output power and lower relative intensity noise. Other paths for improvement requiring a filter redesign to be linear in the optical field are also discussed.

© 2013 OSA

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2012 (2)

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

2011 (1)

2010 (1)

2009 (2)

2008 (1)

2007 (3)

T. Darcie, J. Zhang, P. P. Driessen, and J. J. Eun, “Class-B microwave-photonic link using optical frequency modulation and linear frequency discriminators,” J. Lightwave Technol.25(1), 157–164 (2007).

V. Urick, F. Bucholtz, P. Devgan, J. McKinney, and K. Williams, “Phase modulation with interferometric detection as an alternative to intensity modulation with direct detection for analog-photonic links,” IEEE Trans. Microw. Theory Tech.55(9), 1978–1985 (2007).
[CrossRef]

J. Capmany and D. Novak, “Microwave photonics combines two worlds,” Nat. Photonics1(6), 319–330 (2007).
[CrossRef]

2002 (1)

X. Xie, J. Khurgin, J. Kang, and F. Choa, “Compact linearized optical FM discriminator,” IEEE Photon. Technol. Lett.14(3), 384–386 (2002).
[CrossRef]

1997 (1)

M. LaGasse and S. Thaniyavaru, “Bias-free high-dynamic-range phase-modulated fiber-optic link,” IEEE Photon. Technol. Lett.9(5), 681–683 (1997).
[CrossRef]

1996 (1)

P. A. Besse, E. Gini, M. Bachmann, and H. Melchior, “New 2x2 and 1x3 multimode interference couplers with free selection of power splitting ratios,” J. Lightwave Technol.14(10), 2286–2293 (1996).
[CrossRef]

Bachmann, M.

P. A. Besse, E. Gini, M. Bachmann, and H. Melchior, “New 2x2 and 1x3 multimode interference couplers with free selection of power splitting ratios,” J. Lightwave Technol.14(10), 2286–2293 (1996).
[CrossRef]

Besse, P. A.

P. A. Besse, E. Gini, M. Bachmann, and H. Melchior, “New 2x2 and 1x3 multimode interference couplers with free selection of power splitting ratios,” J. Lightwave Technol.14(10), 2286–2293 (1996).
[CrossRef]

Bolle, C.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

Bucholtz, F.

V. Urick, F. Bucholtz, P. Devgan, J. McKinney, and K. Williams, “Phase modulation with interferometric detection as an alternative to intensity modulation with direct detection for analog-photonic links,” IEEE Trans. Microw. Theory Tech.55(9), 1978–1985 (2007).
[CrossRef]

Buhl, L.

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Capmany, J.

Cappuzzo, M. A.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

Chen, E.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Chen, E. Y.

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Chen, Y. K.

Choa, F.

X. Xie, J. Khurgin, J. Kang, and F. Choa, “Compact linearized optical FM discriminator,” IEEE Photon. Technol. Lett.14(3), 384–386 (2002).
[CrossRef]

Colladay, K.

Darcie, T.

DeSalvo, R.

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Devgan, P.

V. Urick, F. Bucholtz, P. Devgan, J. McKinney, and K. Williams, “Phase modulation with interferometric detection as an alternative to intensity modulation with direct detection for analog-photonic links,” IEEE Trans. Microw. Theory Tech.55(9), 1978–1985 (2007).
[CrossRef]

Driessen, P. P.

Earnshaw, M. P.

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Eun, J. J.

Gasulla, I.

Gini, E.

P. A. Besse, E. Gini, M. Bachmann, and H. Melchior, “New 2x2 and 1x3 multimode interference couplers with free selection of power splitting ratios,” J. Lightwave Technol.14(10), 2286–2293 (1996).
[CrossRef]

Gomez, L.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Gomez, L. T.

Haas, B.

Hoekman, M.

Kang, J.

X. Xie, J. Khurgin, J. Kang, and F. Choa, “Compact linearized optical FM discriminator,” IEEE Photon. Technol. Lett.14(3), 384–386 (2002).
[CrossRef]

Keller, B.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Keller, R.

Khurgin, J.

X. Xie, J. Khurgin, J. Kang, and F. Choa, “Compact linearized optical FM discriminator,” IEEE Photon. Technol. Lett.14(3), 384–386 (2002).
[CrossRef]

Klemens, F.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

LaGasse, M.

M. LaGasse and S. Thaniyavaru, “Bias-free high-dynamic-range phase-modulated fiber-optic link,” IEEE Photon. Technol. Lett.9(5), 681–683 (1997).
[CrossRef]

Leinse, A.

Marpaung, D.

McKinney, J.

Melchior, H.

P. A. Besse, E. Gini, M. Bachmann, and H. Melchior, “New 2x2 and 1x3 multimode interference couplers with free selection of power splitting ratios,” J. Lightwave Technol.14(10), 2286–2293 (1996).
[CrossRef]

Meredith, S.

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Middleton, C.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

Murphy, T.

Novak, D.

J. Capmany and D. Novak, “Microwave photonics combines two worlds,” Nat. Photonics1(6), 319–330 (2007).
[CrossRef]

Pardo, F.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

Peach, R.

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Rasras, M. S.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

Roeloffzen, C.

Thaniyavaru, S.

M. LaGasse and S. Thaniyavaru, “Bias-free high-dynamic-range phase-modulated fiber-optic link,” IEEE Photon. Technol. Lett.9(5), 681–683 (1997).
[CrossRef]

Tu, K. Y.

Tu, K.-Y.

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
[CrossRef]

Urick, V.

B. Haas, V. Urick, J. McKinney, and T. Murphy, “Dual-wavelength linearization of optically phase- modulated analog microwave signals,” J. Lightwave Technol.26(15), 2748–2753 (2008).
[CrossRef]

V. Urick, F. Bucholtz, P. Devgan, J. McKinney, and K. Williams, “Phase modulation with interferometric detection as an alternative to intensity modulation with direct detection for analog-photonic links,” IEEE Trans. Microw. Theory Tech.55(9), 1978–1985 (2007).
[CrossRef]

Williams, K.

J. McKinney, K. Colladay, and K. Williams, “Linearization of phase-modulated analog optical links employing interferometric demodulation,” J. Lightwave Technol.27(9), 1212–1220 (2009).
[CrossRef]

V. Urick, F. Bucholtz, P. Devgan, J. McKinney, and K. Williams, “Phase modulation with interferometric detection as an alternative to intensity modulation with direct detection for analog-photonic links,” IEEE Trans. Microw. Theory Tech.55(9), 1978–1985 (2007).
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[CrossRef]

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Wyrwas, J. M.

J. M. Wyrwas, R. Peach, S. Meredith, C. Middleton, M. S. Rasras, K. Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Y. Chen, L. T. Gomez, F. Klemens, R. Keller, C. Bolle, L. Zhang, L. Buhl, M. C. Wu, Y. K. Chen, and R. DeSalvo, “Linear phase-and-frequency-modulated photonic links using optical discriminators,” Opt. Express20(24), 26292–26298 (2012).
[CrossRef] [PubMed]

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X. Xie, J. Khurgin, J. Kang, and F. Choa, “Compact linearized optical FM discriminator,” IEEE Photon. Technol. Lett.14(3), 384–386 (2002).
[CrossRef]

M. S. Rasras, E. Y. Chen, K.-Y. Tu, M. P. Earnshaw, F. Pardo, M. A. Cappuzzo, E. Chen, L. Gomez, F. Klemens, B. Keller, C. Bolle, L. Buhl, J. M. Wyrwas, M. C. Wu, R. Peach, S. Meredith, C. Middleton, and R. DeSalvo, “Reconfigurable linear optical FM discriminator,” IEEE Photon. Technol. Lett.24(20), 1856–1859 (2012).
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Figures (8)

Fig. 1
Fig. 1

Left: Schematic of the PIC. Target transfer functions of each filter at different points of the layout are shown for clarity. Right: Top-view picture of the manufactured device.

Fig. 2
Fig. 2

Double ring-loaded MZI architecture used for the implementation of the on-chip filters

Fig. 3
Fig. 3

(a) Simulated transfer function of the two complementary outputs of the Input Filter, designed as a 2nd order Elliptic filter. (b)-(c) Simulated transfer functions of Filter 1 and Filter 2, respectively, designed to provide a linear ramp in optical intensity. (d) Total response at the input of each branch of the photodetector.

Fig. 4
Fig. 4

Experimental set-up used for the characterization and adjustment of the optical filters composing the discriminator.

Fig. 5
Fig. 5

(a) Measured and simulated transfer function of the two complementary outputs of the Input Filter, designed as a 2nd order Elliptic filter. (b)-(c) Measured and simulated transfer functions of Filter 1 and Filter 2, respectively, designed to provide a linear ramp in optical intensity. (d) Total response of the cascaded filters, at the input of the balanced photodetector.

Fig. 6
Fig. 6

Experimental set-up used to evaluate the discriminator system level performance.

Fig. 7
Fig. 7

Upper part: Spectral location of the optical carrier and RF sidebands for the different working points where the discriminator performance was measured. Lower part: Measured IIP3 valuesfor the different working points. Also shown the IIP3 value for an ideal MZM link.

Fig. 8
Fig. 8

Output RF power versus input RF power characteristic for some of the cases shown in Figs. 7(a)-7(c).

Tables (1)

Tables Icon

Table 1 Optical Power Coupling Constants and Phases for the Three Different Filters Present in the Design

Equations (3)

Equations on this page are rendered with MathJax. Learn more.

SFDR(dB)= 2 3 [ II P 3 (dB)+ G RF (dB)N(dBm/Hz) ]
G RF (Ω)=4( T P EDFA π V π ) Z in Z out | A Ω Φ | 2
II P 3 = 2 V π 2 π 2 Z in | A Ω 1 Φ | | A 2 Ω 1 Ω 2 Φ |

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