Abstract

We demonstrate transmission of a comb-based 10 Tb/s 50 $\times$ 20 Gbaud PM-64QAM superchannel using frequency comb regeneration to reduce carrier offsets and allow for self-homodyne detection. The regeneration is enabled by transmitting two optical pilot tones which are filtered and recovered in the receiver using optical injection locking and an electrical phase-locked loop. We show that by utilizing frequency combs together with optical pilot tones, self-homodyne detection similar to systems using one pilot tone per wavelength channel, can be achieved. Sharing the overhead for pilot tones reduces the complexity and limits the overhead to 4%. This enabled a total superchannel spectral efficiency of 7.7 b/s/Hz. To evaluate the performance, we perform both back-to-back measurements and transmission over 80 km of standard single-mode fiber. Successful self-homodyne detection of all 50 data channels in the 10-nm-wide superchannel demonstrates that the spectral coherence from frequency combs, combined with the use of optical pilots, can overcome limitations arising from frequency offset and phase noise in high-order QAM transmission while keeping the pilot overhead low.

© 2018 OAPA

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2018 (1)

J.-X. Caiet al., “70.46 Tb/s over 7,600 km and 71.65 Tb/s over 6,970 km transmission in c+l band using coded modulation with hybrid constellation shaping and nonlinearity compensation,” J. Lightw. Technol., vol. 36, no. 1, pp. 114–121, 2018.

2017 (3)

2016 (7)

Y. Wang, K. Kasai, M. Yoshida, and M. Nakazawa, “320 Gbit/s, 20 Gsymbol/s 256 QAM coherent transmission over 160 km by using injection-locked local oscillator,” Opt. Express, vol. 24, no. 19, pp. 22088–22096, 2016.

A. F. Alfredsson, R. Krishnan, and E. Agrell, “Joint-polarization phase-noise estimation and symbol detection for optical coherent receivers,” J. Lightw. Technol., vol. 34, no. 18, pp. 4394–4405, 2016.

R. S. Luíset al., “Time and modulation frequency dependence of crosstalk in homogeneous multi-core fibers,” J. Lightw. Technol., vol. 34, no. 2, pp. 441–447, 2016.

T. Rahmanet al., “Long-haul transmission of PM-16QAM, PM-32QAM and PM-64QAM based terabit superchannels over a field deployed legacy fiber,” J. Lightw. Technol., vol. 34, no. 13, pp. 3071–3079, 2016.

A. Lorences-Riesgo, M. Mazur, T. A. Eriksson, P. A. Andrekson, and M. Karlsson, “Self-homodyne 24x32-QAM superchannel receiver enabled by all-optical comb regeneration using Brillouin amplification,” Opt. Express, vol. 24, no. 26, pp. 29 714–29 723, 2016.

A. Lorences-Riesgo, T. A. Eriksson, A. Fülöp, P. A. Andrekson, and M. Karlsson, “Frequency-comb regeneration for self-homodyne superchannels,” J. Lightw. Technol., vol. 34, no. 8, pp. 1800–1806, 2016.

A. Alvarado, E. Agrell, D. Lavery, R. Maher, and P. Bayvel, “Replacing the soft-decision FEC limit paradigm in the design of optical communication systems,” J. Lightw. Technol., vol. 34, no. 2, pp. 707–721, 2016.

2015 (4)

2014 (2)

C. Laperle and M. Osullivan, “Advances in high-speed DACs, ADCs, and DSP for optical coherent transceivers,” J. Lightw. Technol., vol. 32, no. 4, pp. 629–643, 2014.

B. S. G. Pillaiet al., “End-to-end energy modeling and analysis of long-haul coherent transmission systems,” J. Lightw. Technol., vol. 32, no. 18, pp. 3093–3111, 2014.

2013 (3)

D. S. Wu, R. Slavík, G. Marra, and D. J. Richardson, “Direct selection and amplification of individual narrowly spaced optical comb modes via injection locking: Design and characterization,” J. Lightw. Technol., vol. 31, no. 14, pp. 2287–2295, 2013.

A. J. Metcalf, V. Torres-Company, D. E. Leaird, and A. M. Weiner, “High-power broadly tunable electrooptic frequency comb generator,” J. Select. Topics Quantum Electron., vol. 19, no. 6, pp. 231–236, 2013.

B. J. Puttnamet al., “Investigating self-homodyne coherent detection in a 19 channel space-division-multiplexed transmission link,” Opt. Express, vol. 21, no. 2, pp. 1561–1566, 2013.

2011 (1)

M. Sjödin, E. Agrell, P. Johannisson, G.-W. Lu, P. A. Andrekson, and M. Karlsson, “Filter optimization for self-homodyne coherent WDM systems using interleaved polarization division multiplexing,” J. Lightw. Technol., vol. 29, no. 9, pp. 1219–1226, 2011.

2009 (1)

T. Pfau, S. Hoffmann, and R. Noé, “Hardware-efficient coherent digital receiver concept with feedforward carrier recovery for $ M$-QAM constellations,” J. Lightw. Technol., vol. 27, no. 8, pp. 989–999, 2009.

2005 (1)

T. Miyazaki and F. Kubota, “PSK self-homodyne detection using a pilot carrier for multibit/symbol transmission with inverse-RZ signal,” IEEE Photon. Technol. Lett., vol. 17, no. 6, pp. 1334–1336, 2005.

Agrell, E.

A. F. Alfredsson, R. Krishnan, and E. Agrell, “Joint-polarization phase-noise estimation and symbol detection for optical coherent receivers,” J. Lightw. Technol., vol. 34, no. 18, pp. 4394–4405, 2016.

A. Alvarado, E. Agrell, D. Lavery, R. Maher, and P. Bayvel, “Replacing the soft-decision FEC limit paradigm in the design of optical communication systems,” J. Lightw. Technol., vol. 34, no. 2, pp. 707–721, 2016.

M. Sjödin, E. Agrell, P. Johannisson, G.-W. Lu, P. A. Andrekson, and M. Karlsson, “Filter optimization for self-homodyne coherent WDM systems using interleaved polarization division multiplexing,” J. Lightw. Technol., vol. 29, no. 9, pp. 1219–1226, 2011.

Alfredsson, A. F.

A. F. Alfredsson, R. Krishnan, and E. Agrell, “Joint-polarization phase-noise estimation and symbol detection for optical coherent receivers,” J. Lightw. Technol., vol. 34, no. 18, pp. 4394–4405, 2016.

Alvarado, A.

A. Alvarado, E. Agrell, D. Lavery, R. Maher, and P. Bayvel, “Replacing the soft-decision FEC limit paradigm in the design of optical communication systems,” J. Lightw. Technol., vol. 34, no. 2, pp. 707–721, 2016.

Andrekson, P. A.

A. Lorences-Riesgo, T. A. Eriksson, A. Fülöp, P. A. Andrekson, and M. Karlsson, “Frequency-comb regeneration for self-homodyne superchannels,” J. Lightw. Technol., vol. 34, no. 8, pp. 1800–1806, 2016.

A. Lorences-Riesgo, M. Mazur, T. A. Eriksson, P. A. Andrekson, and M. Karlsson, “Self-homodyne 24x32-QAM superchannel receiver enabled by all-optical comb regeneration using Brillouin amplification,” Opt. Express, vol. 24, no. 26, pp. 29 714–29 723, 2016.

M. Sjödin, E. Agrell, P. Johannisson, G.-W. Lu, P. A. Andrekson, and M. Karlsson, “Filter optimization for self-homodyne coherent WDM systems using interleaved polarization division multiplexing,” J. Lightw. Technol., vol. 29, no. 9, pp. 1219–1226, 2011.

L. Lundberg, M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “Joint carrier recovery for DSP complexity reduction in frequency comb-based superchannel transceivers,” in Proc. Eur. Conf. Opt. Commun., 2017, Paper Th.1.D.3.

M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “10 Tb/s self-homodyne 64-QAM superchannel transmission with 4% spectral overhead,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper Th3F.4.

Awaji, Y.

R. S. Luís, B. J. Puttnam, J. M. D. Mendinueta, Y. Awaji, and N. Wada, “Impact of spatial channel skew on the performance of spatial-division multiplexed self-homodyne transmission systems,” in Proc. Int. Conf. Photon. Switching, 2015, pp. 37–39.

Bayvel, P.

A. Alvarado, E. Agrell, D. Lavery, R. Maher, and P. Bayvel, “Replacing the soft-decision FEC limit paradigm in the design of optical communication systems,” J. Lightw. Technol., vol. 34, no. 2, pp. 707–721, 2016.

Beppu, S.

Bertignono, L.

Bordonalli, A. C.

Bosco, G.

Cai, J.-X.

J.-X. Caiet al., “70.46 Tb/s over 7,600 km and 71.65 Tb/s over 6,970 km transmission in c+l band using coded modulation with hybrid constellation shaping and nonlinearity compensation,” J. Lightw. Technol., vol. 36, no. 1, pp. 114–121, 2018.

Carena, A.

Chandrasekhar, S.

S. Chandrasekharet al., “High-spectral-efficiency transmission of PDM 256-QAM with parallel probabilistic shaping at record rate-reach trade-offs,” in Proc. Eur. Conf. Opt. Commun., 2016, Paper Th.3.C.1.

Chang, D.

D. Changet al., “LDPC convolutional codes using layered decoding algorithm for high speed coherent optical transmission,” in Proc. Opt. Fiber Commun. Conf., 2012, Paper OW1H.4.

Dar, R.

R. Daret al., “Impact of WDM channel correlations on nonlinear transmission,” in Proc. Eur. Conf. Opt. Commun., 2016, pp. 1–3.

Eriksson, T. A.

A. Lorences-Riesgo, M. Mazur, T. A. Eriksson, P. A. Andrekson, and M. Karlsson, “Self-homodyne 24x32-QAM superchannel receiver enabled by all-optical comb regeneration using Brillouin amplification,” Opt. Express, vol. 24, no. 26, pp. 29 714–29 723, 2016.

A. Lorences-Riesgo, T. A. Eriksson, A. Fülöp, P. A. Andrekson, and M. Karlsson, “Frequency-comb regeneration for self-homodyne superchannels,” J. Lightw. Technol., vol. 34, no. 8, pp. 1800–1806, 2016.

T. Fehenberger, N. Hanik, T. A. Eriksson, P. Johannisson, and M. Karlsson, “On the impact of carrier phase estimation on phase correlations in coherent fiber transmission,” in Proc. Tyrrhenian Int. Workshop Digital Commun., 2015, pp. 35–38.

Fehenberger, T.

T. Fehenberger, N. Hanik, T. A. Eriksson, P. Johannisson, and M. Karlsson, “On the impact of carrier phase estimation on phase correlations in coherent fiber transmission,” in Proc. Tyrrhenian Int. Workshop Digital Commun., 2015, pp. 35–38.

Fice, M. J.

Fülöp, A.

A. Lorences-Riesgo, T. A. Eriksson, A. Fülöp, P. A. Andrekson, and M. Karlsson, “Frequency-comb regeneration for self-homodyne superchannels,” J. Lightw. Technol., vol. 34, no. 8, pp. 1800–1806, 2016.

Ghazisaeidi, A.

A. Ghazisaeidiet al., “Transoceanic transmission systems using adaptive multirate FECs,” J. Lightw. Technol., vol. 33, no. 7, pp. 1479–1487, 2015.

Guiomar, F. P.

Hanik, N.

T. Fehenberger, N. Hanik, T. A. Eriksson, P. Johannisson, and M. Karlsson, “On the impact of carrier phase estimation on phase correlations in coherent fiber transmission,” in Proc. Tyrrhenian Int. Workshop Digital Commun., 2015, pp. 35–38.

Hirooka, T.

K. Kasai, M. Yoshida, T. Hirooka, and M. Nakazawa, “Injection-locked homodyne detection system for higher-order QAM digital coherent transmission,” in Proc. Eur. Conf. Opt. Commun., 2016, Paper M.1.C.3.

Hoffmann, S.

T. Pfau, S. Hoffmann, and R. Noé, “Hardware-efficient coherent digital receiver concept with feedforward carrier recovery for $ M$-QAM constellations,” J. Lightw. Technol., vol. 27, no. 8, pp. 989–999, 2009.

Johannisson, P.

M. Sjödin, E. Agrell, P. Johannisson, G.-W. Lu, P. A. Andrekson, and M. Karlsson, “Filter optimization for self-homodyne coherent WDM systems using interleaved polarization division multiplexing,” J. Lightw. Technol., vol. 29, no. 9, pp. 1219–1226, 2011.

T. Fehenberger, N. Hanik, T. A. Eriksson, P. Johannisson, and M. Karlsson, “On the impact of carrier phase estimation on phase correlations in coherent fiber transmission,” in Proc. Tyrrhenian Int. Workshop Digital Commun., 2015, pp. 35–38.

Kan, T.

Karlsson, M.

A. Lorences-Riesgo, M. Mazur, T. A. Eriksson, P. A. Andrekson, and M. Karlsson, “Self-homodyne 24x32-QAM superchannel receiver enabled by all-optical comb regeneration using Brillouin amplification,” Opt. Express, vol. 24, no. 26, pp. 29 714–29 723, 2016.

A. Lorences-Riesgo, T. A. Eriksson, A. Fülöp, P. A. Andrekson, and M. Karlsson, “Frequency-comb regeneration for self-homodyne superchannels,” J. Lightw. Technol., vol. 34, no. 8, pp. 1800–1806, 2016.

M. Sjödin, E. Agrell, P. Johannisson, G.-W. Lu, P. A. Andrekson, and M. Karlsson, “Filter optimization for self-homodyne coherent WDM systems using interleaved polarization division multiplexing,” J. Lightw. Technol., vol. 29, no. 9, pp. 1219–1226, 2011.

L. Lundberg, M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “Joint carrier recovery for DSP complexity reduction in frequency comb-based superchannel transceivers,” in Proc. Eur. Conf. Opt. Commun., 2017, Paper Th.1.D.3.

M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “10 Tb/s self-homodyne 64-QAM superchannel transmission with 4% spectral overhead,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper Th3F.4.

T. Fehenberger, N. Hanik, T. A. Eriksson, P. Johannisson, and M. Karlsson, “On the impact of carrier phase estimation on phase correlations in coherent fiber transmission,” in Proc. Tyrrhenian Int. Workshop Digital Commun., 2015, pp. 35–38.

Kasai, K.

Krishnan, R.

A. F. Alfredsson, R. Krishnan, and E. Agrell, “Joint-polarization phase-noise estimation and symbol detection for optical coherent receivers,” J. Lightw. Technol., vol. 34, no. 18, pp. 4394–4405, 2016.

Kubota, F.

T. Miyazaki and F. Kubota, “PSK self-homodyne detection using a pilot carrier for multibit/symbol transmission with inverse-RZ signal,” IEEE Photon. Technol. Lett., vol. 17, no. 6, pp. 1334–1336, 2005.

Laperle, C.

C. Laperle and M. Osullivan, “Advances in high-speed DACs, ADCs, and DSP for optical coherent transceivers,” J. Lightw. Technol., vol. 32, no. 4, pp. 629–643, 2014.

Lavery, D.

A. Alvarado, E. Agrell, D. Lavery, R. Maher, and P. Bayvel, “Replacing the soft-decision FEC limit paradigm in the design of optical communication systems,” J. Lightw. Technol., vol. 34, no. 2, pp. 707–721, 2016.

Leaird, D. E.

A. J. Metcalf, V. Torres-Company, D. E. Leaird, and A. M. Weiner, “High-power broadly tunable electrooptic frequency comb generator,” J. Select. Topics Quantum Electron., vol. 19, no. 6, pp. 231–236, 2013.

Lorences-Riesgo, A.

A. Lorences-Riesgo, M. Mazur, T. A. Eriksson, P. A. Andrekson, and M. Karlsson, “Self-homodyne 24x32-QAM superchannel receiver enabled by all-optical comb regeneration using Brillouin amplification,” Opt. Express, vol. 24, no. 26, pp. 29 714–29 723, 2016.

A. Lorences-Riesgo, T. A. Eriksson, A. Fülöp, P. A. Andrekson, and M. Karlsson, “Frequency-comb regeneration for self-homodyne superchannels,” J. Lightw. Technol., vol. 34, no. 8, pp. 1800–1806, 2016.

M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “10 Tb/s self-homodyne 64-QAM superchannel transmission with 4% spectral overhead,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper Th3F.4.

L. Lundberg, M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “Joint carrier recovery for DSP complexity reduction in frequency comb-based superchannel transceivers,” in Proc. Eur. Conf. Opt. Commun., 2017, Paper Th.1.D.3.

Lu, G.-W.

M. Sjödin, E. Agrell, P. Johannisson, G.-W. Lu, P. A. Andrekson, and M. Karlsson, “Filter optimization for self-homodyne coherent WDM systems using interleaved polarization division multiplexing,” J. Lightw. Technol., vol. 29, no. 9, pp. 1219–1226, 2011.

Luís, R. S.

R. S. Luíset al., “Time and modulation frequency dependence of crosstalk in homogeneous multi-core fibers,” J. Lightw. Technol., vol. 34, no. 2, pp. 441–447, 2016.

R. S. Luís, B. J. Puttnam, J. M. D. Mendinueta, Y. Awaji, and N. Wada, “Impact of spatial channel skew on the performance of spatial-division multiplexed self-homodyne transmission systems,” in Proc. Int. Conf. Photon. Switching, 2015, pp. 37–39.

Lundberg, L.

L. Lundberg, M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “Joint carrier recovery for DSP complexity reduction in frequency comb-based superchannel transceivers,” in Proc. Eur. Conf. Opt. Commun., 2017, Paper Th.1.D.3.

Maher, R.

A. Alvarado, E. Agrell, D. Lavery, R. Maher, and P. Bayvel, “Replacing the soft-decision FEC limit paradigm in the design of optical communication systems,” J. Lightw. Technol., vol. 34, no. 2, pp. 707–721, 2016.

Marra, G.

D. S. Wu, R. Slavík, G. Marra, and D. J. Richardson, “Direct selection and amplification of individual narrowly spaced optical comb modes via injection locking: Design and characterization,” J. Lightw. Technol., vol. 31, no. 14, pp. 2287–2295, 2013.

Mazur, M.

A. Lorences-Riesgo, M. Mazur, T. A. Eriksson, P. A. Andrekson, and M. Karlsson, “Self-homodyne 24x32-QAM superchannel receiver enabled by all-optical comb regeneration using Brillouin amplification,” Opt. Express, vol. 24, no. 26, pp. 29 714–29 723, 2016.

M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “10 Tb/s self-homodyne 64-QAM superchannel transmission with 4% spectral overhead,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper Th3F.4.

L. Lundberg, M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “Joint carrier recovery for DSP complexity reduction in frequency comb-based superchannel transceivers,” in Proc. Eur. Conf. Opt. Commun., 2017, Paper Th.1.D.3.

Mendinueta, J. M. D.

J. M. D. Mendinuetaet al., “Investigation of receiver DSP carrier phase estimation rate for self-homodyne space-division multiplexing communication systems,” in Proc. Optical Fiber Commun. Conf., 2013, Paper Th2A.48.

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Metcalf, A. J.

A. J. Metcalf, V. Torres-Company, D. E. Leaird, and A. M. Weiner, “High-power broadly tunable electrooptic frequency comb generator,” J. Select. Topics Quantum Electron., vol. 19, no. 6, pp. 231–236, 2013.

Miyazaki, T.

T. Miyazaki and F. Kubota, “PSK self-homodyne detection using a pilot carrier for multibit/symbol transmission with inverse-RZ signal,” IEEE Photon. Technol. Lett., vol. 17, no. 6, pp. 1334–1336, 2005.

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C. Laperle and M. Osullivan, “Advances in high-speed DACs, ADCs, and DSP for optical coherent transceivers,” J. Lightw. Technol., vol. 32, no. 4, pp. 629–643, 2014.

Pfau, T.

T. Pfau, S. Hoffmann, and R. Noé, “Hardware-efficient coherent digital receiver concept with feedforward carrier recovery for $ M$-QAM constellations,” J. Lightw. Technol., vol. 27, no. 8, pp. 989–999, 2009.

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Puttnam, B. J.

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Rahman, T.

T. Rahmanet al., “Long-haul transmission of PM-16QAM, PM-32QAM and PM-64QAM based terabit superchannels over a field deployed legacy fiber,” J. Lightw. Technol., vol. 34, no. 13, pp. 3071–3079, 2016.

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D. S. Wu, R. Slavík, G. Marra, and D. J. Richardson, “Direct selection and amplification of individual narrowly spaced optical comb modes via injection locking: Design and characterization,” J. Lightw. Technol., vol. 31, no. 14, pp. 2287–2295, 2013.

Seeds, A. J.

Sjödin, M.

M. Sjödin, E. Agrell, P. Johannisson, G.-W. Lu, P. A. Andrekson, and M. Karlsson, “Filter optimization for self-homodyne coherent WDM systems using interleaved polarization division multiplexing,” J. Lightw. Technol., vol. 29, no. 9, pp. 1219–1226, 2011.

Slavík, R.

D. S. Wu, R. Slavík, G. Marra, and D. J. Richardson, “Direct selection and amplification of individual narrowly spaced optical comb modes via injection locking: Design and characterization,” J. Lightw. Technol., vol. 31, no. 14, pp. 2287–2295, 2013.

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A. J. Metcalf, V. Torres-Company, D. E. Leaird, and A. M. Weiner, “High-power broadly tunable electrooptic frequency comb generator,” J. Select. Topics Quantum Electron., vol. 19, no. 6, pp. 231–236, 2013.

Wada, N.

R. S. Luís, B. J. Puttnam, J. M. D. Mendinueta, Y. Awaji, and N. Wada, “Impact of spatial channel skew on the performance of spatial-division multiplexed self-homodyne transmission systems,” in Proc. Int. Conf. Photon. Switching, 2015, pp. 37–39.

Wang, Y.

Weiner, A. M.

A. J. Metcalf, V. Torres-Company, D. E. Leaird, and A. M. Weiner, “High-power broadly tunable electrooptic frequency comb generator,” J. Select. Topics Quantum Electron., vol. 19, no. 6, pp. 231–236, 2013.

Winzer, P. J.

P. J. Winzer and D. T. Neilson, “From scaling disparities to integrated parallelism: A decathlon for a decade,” J. Lightw. Technol., vol. 35, no. 5, pp. 1099–1115, 2017.

Wolf, S.

S. Wolfet al., “Silicon-oganic hybrid (SOH) IQ modulator for 100 GBd 16QAM operation,” in Proc. Opt. Fiber Commun. Conf. Exhib., 2017, Paper Th5C.1.

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D. S. Wu, R. Slavík, G. Marra, and D. J. Richardson, “Direct selection and amplification of individual narrowly spaced optical comb modes via injection locking: Design and characterization,” J. Lightw. Technol., vol. 31, no. 14, pp. 2287–2295, 2013.

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IEEE Photon. Technol. Lett. (1)

T. Miyazaki and F. Kubota, “PSK self-homodyne detection using a pilot carrier for multibit/symbol transmission with inverse-RZ signal,” IEEE Photon. Technol. Lett., vol. 17, no. 6, pp. 1334–1336, 2005.

J. Lightw. Technol. (13)

M. Sjödin, E. Agrell, P. Johannisson, G.-W. Lu, P. A. Andrekson, and M. Karlsson, “Filter optimization for self-homodyne coherent WDM systems using interleaved polarization division multiplexing,” J. Lightw. Technol., vol. 29, no. 9, pp. 1219–1226, 2011.

C. Laperle and M. Osullivan, “Advances in high-speed DACs, ADCs, and DSP for optical coherent transceivers,” J. Lightw. Technol., vol. 32, no. 4, pp. 629–643, 2014.

B. S. G. Pillaiet al., “End-to-end energy modeling and analysis of long-haul coherent transmission systems,” J. Lightw. Technol., vol. 32, no. 18, pp. 3093–3111, 2014.

T. Rahmanet al., “Long-haul transmission of PM-16QAM, PM-32QAM and PM-64QAM based terabit superchannels over a field deployed legacy fiber,” J. Lightw. Technol., vol. 34, no. 13, pp. 3071–3079, 2016.

J.-X. Caiet al., “70.46 Tb/s over 7,600 km and 71.65 Tb/s over 6,970 km transmission in c+l band using coded modulation with hybrid constellation shaping and nonlinearity compensation,” J. Lightw. Technol., vol. 36, no. 1, pp. 114–121, 2018.

P. J. Winzer and D. T. Neilson, “From scaling disparities to integrated parallelism: A decathlon for a decade,” J. Lightw. Technol., vol. 35, no. 5, pp. 1099–1115, 2017.

A. F. Alfredsson, R. Krishnan, and E. Agrell, “Joint-polarization phase-noise estimation and symbol detection for optical coherent receivers,” J. Lightw. Technol., vol. 34, no. 18, pp. 4394–4405, 2016.

R. S. Luíset al., “Time and modulation frequency dependence of crosstalk in homogeneous multi-core fibers,” J. Lightw. Technol., vol. 34, no. 2, pp. 441–447, 2016.

T. Pfau, S. Hoffmann, and R. Noé, “Hardware-efficient coherent digital receiver concept with feedforward carrier recovery for $ M$-QAM constellations,” J. Lightw. Technol., vol. 27, no. 8, pp. 989–999, 2009.

A. Lorences-Riesgo, T. A. Eriksson, A. Fülöp, P. A. Andrekson, and M. Karlsson, “Frequency-comb regeneration for self-homodyne superchannels,” J. Lightw. Technol., vol. 34, no. 8, pp. 1800–1806, 2016.

A. Alvarado, E. Agrell, D. Lavery, R. Maher, and P. Bayvel, “Replacing the soft-decision FEC limit paradigm in the design of optical communication systems,” J. Lightw. Technol., vol. 34, no. 2, pp. 707–721, 2016.

D. S. Wu, R. Slavík, G. Marra, and D. J. Richardson, “Direct selection and amplification of individual narrowly spaced optical comb modes via injection locking: Design and characterization,” J. Lightw. Technol., vol. 31, no. 14, pp. 2287–2295, 2013.

A. Ghazisaeidiet al., “Transoceanic transmission systems using adaptive multirate FECs,” J. Lightw. Technol., vol. 33, no. 7, pp. 1479–1487, 2015.

J. Select. Topics Quantum Electron. (1)

A. J. Metcalf, V. Torres-Company, D. E. Leaird, and A. M. Weiner, “High-power broadly tunable electrooptic frequency comb generator,” J. Select. Topics Quantum Electron., vol. 19, no. 6, pp. 231–236, 2013.

Opt. Express (8)

A. Lorences-Riesgo, M. Mazur, T. A. Eriksson, P. A. Andrekson, and M. Karlsson, “Self-homodyne 24x32-QAM superchannel receiver enabled by all-optical comb regeneration using Brillouin amplification,” Opt. Express, vol. 24, no. 26, pp. 29 714–29 723, 2016.

B. J. Puttnamet al., “Investigating self-homodyne coherent detection in a 19 channel space-division-multiplexed transmission link,” Opt. Express, vol. 21, no. 2, pp. 1561–1566, 2013.

A. C. Bordonalli, M. J. Fice, and A. J. Seeds, “Optical injection locking to optical frequency combs for superchannel coherent detection,” Opt. Express, vol. 23, no. 2, pp. 1547–1557, 2015.

S. Beppu, K. Kasai, M. Yoshida, and M. Nakazawa, “2048 QAM (66 Gbit/s) single-carrier coherent optical transmission over 150 km with a potential SE of 15.3 bit/s/Hz,” Opt. Express, vol. 23, no. 4, pp. 4960–4969, 2015.

K. Kasai, Y. Wang, S. Beppu, M. Yoshida, and M. Nakazawa, “80 Gbit/s, 256 QAM coherent transmission over 150 km with an injection-locked homodyne receiver,” Opt. Express, vol. 23, no. 22, pp. 29174–29183, 2015.

Y. Wang, K. Kasai, M. Yoshida, and M. Nakazawa, “320 Gbit/s, 20 Gsymbol/s 256 QAM coherent transmission over 160 km by using injection-locked local oscillator,” Opt. Express, vol. 24, no. 19, pp. 22088–22096, 2016.

F. P. Guiomar, A. Carena, G. Bosco, L. Bertignono, A. Nespola, and P. Poggiolini, “Nonlinear mitigation on subcarrier-multiplexed PM-16QAM optical systems,” Opt. Express, vol. 25, no. 4, pp. 4298–4311, 2017.

T. Kan, K. Kasai, M. Yoshida, and M. Nakazawa, “42.3 Tbit/s, 18 Gbaud 64 QAM WDM coherent transmission over 160 km in the C-band using an injection-locked homodyne receiver with a spectral efficiency of 9 bit/s/Hz,” Opt. Express, vol. 25, no. 19, pp. 22726–22737, 2017.

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S. Chandrasekharet al., “High-spectral-efficiency transmission of PDM 256-QAM with parallel probabilistic shaping at record rate-reach trade-offs,” in Proc. Eur. Conf. Opt. Commun., 2016, Paper Th.3.C.1.

R. Daret al., “Impact of WDM channel correlations on nonlinear transmission,” in Proc. Eur. Conf. Opt. Commun., 2016, pp. 1–3.

T. Fehenberger, N. Hanik, T. A. Eriksson, P. Johannisson, and M. Karlsson, “On the impact of carrier phase estimation on phase correlations in coherent fiber transmission,” in Proc. Tyrrhenian Int. Workshop Digital Commun., 2015, pp. 35–38.

D. Changet al., “LDPC convolutional codes using layered decoding algorithm for high speed coherent optical transmission,” in Proc. Opt. Fiber Commun. Conf., 2012, Paper OW1H.4.

M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “10 Tb/s self-homodyne 64-QAM superchannel transmission with 4% spectral overhead,” in Proc. Opt. Fiber Commun. Conf., 2017, Paper Th3F.4.

B. Puttnamet al., “2.15 Pb/s transmission using a 22 core homogeneous single-mode multi-core fiber and wideband optical comb,” in Proc. Eur. Conf. Opt. Commun., 2015, Paper PDP3.1.

R. S. Luís, B. J. Puttnam, J. M. D. Mendinueta, Y. Awaji, and N. Wada, “Impact of spatial channel skew on the performance of spatial-division multiplexed self-homodyne transmission systems,” in Proc. Int. Conf. Photon. Switching, 2015, pp. 37–39.

K. Kasai, M. Yoshida, T. Hirooka, and M. Nakazawa, “Injection-locked homodyne detection system for higher-order QAM digital coherent transmission,” in Proc. Eur. Conf. Opt. Commun., 2016, Paper M.1.C.3.

L. Lundberg, M. Mazur, A. Lorences-Riesgo, M. Karlsson, and P. A. Andrekson, “Joint carrier recovery for DSP complexity reduction in frequency comb-based superchannel transceivers,” in Proc. Eur. Conf. Opt. Commun., 2017, Paper Th.1.D.3.

S. Wolfet al., “Silicon-oganic hybrid (SOH) IQ modulator for 100 GBd 16QAM operation,” in Proc. Opt. Fiber Commun. Conf. Exhib., 2017, Paper Th5C.1.

J. M. D. Mendinuetaet al., “Investigation of receiver DSP carrier phase estimation rate for self-homodyne space-division multiplexing communication systems,” in Proc. Optical Fiber Commun. Conf., 2013, Paper Th2A.48.

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