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S. Ishimura and K. Kikuchi, “Multi-dimensional permutation-modulation format for coherent optical communications,” Opt. Exp., vol. 23, no. 12, pp. 15587–15597, 2015.
X. Liu, A. R. Chraplyvy, P. J. Winzer, R. W. Tkach, and S. Chandrasekhar, “Phase-conjugated twin waves for communication beyond the Kerr nonlinearity limit,” Nature Photon., vol. 7, no. 7, pp. 560–568, 2013.
F. P. Guiomar, J. D. Reis, A. L. Teixeira, and A. N. Pinto, “Mitigation of intra-channel nonlinearities using a frequency-domain Volterra series equalizer,” Opt. Exp., vol. 20, no. 2, pp. 1360–1368, 2012.
Y. Mori, C. Zhang, and K. Kikuchi, “Novel configuration of finite-impulse-response filters tolerant to carrier-phase fluctuations in digital coherent optical receivers for higher-order quadrature amplitude modulation signals,” Opt. Exp., vol. 20, no. 24, pp. 26236–26251, 2012.
K. Kikuchi, “Clock recovering characteristics of adaptive finite-impulse-response filters in digital coherent optical receivers,” Opt. Exp., vol. 19, no. 6, pp. 5611–5619, 2011.
K. Kikuchi, “Performance analyses of polarization demultiplexing based on constant-modulus algorithm in digital coherent optical receivers,” Opt. Exp., vol. 19, no. 10, pp. 9868–9880, 2011.
Md. S. Faruk and K. Kikuchi, “Adaptive frequency-domain equalization in digital coherent receivers,” Opt. Exp., vol. 19, no. 13, pp. 12789–12798, 2011.
K. Kikuchi, “Analyses of wavelength- and polarization-division multiplexed transmission characteristics of optical quadrature-amplitude-modulation signals,” Opt. Exp., vol. 19, no. 19, pp. 17985–17995, 2011.
E. Yamazaki, S. Yamanaka, Y. Kisaka, T. Nakagawa, K. Murata, E. Yoshida, T. Sakano, M. Tomizawa, Y. Miyamoto, S. Matsuoka, J. Matsui, A. Shibayama, J. Abe, Y. Nakamura, H. Noguchi, K. Fukuchi, H. Onaka, K. Fukumitsu, K. Komaki, O. Takeuchi, Y. Sakamoto, H. Nakashima, T. Mizuochi, K. Kubo, Y. Miyata, H. Nishimoto, S. Hirano, and K. Onohara, “Fast optical channel recovery in field demonstration of 100-Gbit/s Ethernet over OTN using real-time DSP,” Opt. Exp., vol. 19, no. 14, pp. 13139–13184, 2011.
K. Kikuchi, “Digital coherent optical communication systems: Fundamentals and future prospects,” IEICE Electron. Exp., vol. 8, no. 20, pp. 1642–1662, 2011.
Md. S. Faruk, Y. Mori, C. Zhang, K. Igarashi, and K. Kikuchi, “Multi-impairment monitoring from adaptive finite-impulse-response filters in a digital coherent receiver,” Opt. Exp., vol. 18, no. 26, pp. 26929–26936. 2010.
R. Kudo, T. Kobayashi, K. Ishihara, Y. Takatori, A. Sano, and Y. Miyamoto, “Coherent optical single carrier transmission using overlap frequency domain equalization for long-haul optical systems,” J. Lightw. Technol., vol. 27, no. 16, pp. 3721–3718, 2009.
M. Karlsson and E. Agrell, “Which is the most power-efficient modulation format in optical links?” Opt. Exp., vol. 17, no. 13, pp. 10814–10819, 2009.
E. Agrell and M. Karlsson, “Power-efficient modulation formats in coherent transmission systems,” J. Lightw. Technol., vol. 27, no. 22, pp. 5115–5126, 2009.
Y. Mori, C. Zhang, K. Igarashi, K. Katoh, and K. Kikuchi, “Unrepeated 200-km transmission of 40-Gbit/s 16-QAM signals using digital coherent receiver,” Opt. Exp., vol. 17, no. 32, pp. 1435–1441, 2009.
K. Kikuchi and S. Tsukamoto, “Evaluation of sensitivity of the digital coherent receiver,” J. Lightw. Technol., vol. 20, no. 13, pp. 1817–1822, 2008.
S. J. Savory, “Digital filters for coherent optical receivers,” Opt. Exp., vol. 16, no. 2, pp. 804–817, 2008.
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F. Pancaldi, G. M. Vitetta, R. Kalbasi, N. Al-Dhahir, M. Uysal, and H. Mheidat, “Single-carrier frequency domain equalization,” IEEE Signal Process. Mag., vol. 25, no. 5, pp. 37–56, 2008.
K. Kikuchi, “Electronic post-compensation for nonlinear phase fluctuations in a 1000-km 20-Gbit/s optical quadrature phase-shift keying transmission system using the digital coherent receiver,” Opt. Exp., vol. 16, no. 2, pp. 889–896, 2008.
E. Ip and J. M. Kahn, “Compensation of dispersion and nonlinear impairments using digital backpropagation,” J. Lightw. Technol., vol. 26, no. 20, pp. 3416–3425, 2008.
K. Roberts, L. Chuandong, L. Strawczynski, M. O'Sullivan, and I. Hardcastle, “Electronic precompensation of optical nonlinearity,” IEEE Photon. Technol. Lett., vol. 18, no. 2, pp. 403–405, 2006.
D.-S. Ly-Gagnon, S. Tsukamoto, K. Katoh, and K. Kikuchi, “Coherent detection of optical quadrature phase-shift keying signals with carrier phase estimation,” J. Lightw. Technol., vol. 24, no. 1, pp. 12–21, 2006.
K. Kikuchi, “Phase-diversity homodyne detection of multi-level optical modulation with digital carrier phase estimation,” IEEE J. Sel. TopicQuantum Electron., vol. 12, no. 4, pp. 563–570, 2006.
S. Tsukamoto, K. Katoh, and K. Kikuchi, “Coherent demodulation of optical multilevel phase shift-keying signals using homodyne detection and digital signal processing,” IEEE Photon. Technol. Lett., vol. 18, no. 10, pp. 1131–1133, 2006.
S. Tsukamoto, K. Katoh, and K. Kikuchi, “Unrepeated transmission of 20-Gbit/s optical quadrature phase-shift keying signal over 200-km standard single-mode fiber based on digital processing of homodyne-detected signal for group-velocity dispersion compensation,” IEEE Photon. Technol. Lett., vol. 18, no. 9, pp. 1016–1018, 2006.
T. Tanemura and K. Kikuchi, “Circular-birefringence fiber for nonlinear optical signal processing,” J. Lightw. Technol., vol. 24, no. 11, pp. 4108–4119, 2006.
J. M. Kahn and K.-P. Ho, “Spectral efficiency limits and modulation/detection techniques for DWDM systems,” IEEE J. Sel. Topics Quantum Electron., vol. 10, no. 2, pp. 259–272, 2004.
M. Taylor, “Coherent detection method using DSP for demodulation of signal and subsequent equalization of propagation impairments,” IEEE Photon. Technol. Lett., vol. 16, no. 2, pp. 674–676, 2004.
S. Shimotsu, S. Oikawa, T. Saitou, N. Mitsugi, K. Kubodera, T. Kawanishi, and M. Izutsu, “Single side-band modulation performance of a LiNbO$_3$ integrated modulator consisting of four-phase modulator waveguides,” IEEE Photon. Technol. Lett., vol. 13, no. 4, pp. 364–366, 2001.
S. G. Evangelides, Jr., L. F. Mollenauer, J. P. Gordon, and N. S. Bergano, “Polarization multiplexing with solitons,” J. Lightw. Technol., vol. 10, no. 1, pp. 28–35, 1992.
F. Derr, “Optical QPSK transmission system with novel digital receiver concept,” Electron Lett., vol. 27, no. 23, pp. 2177–2179, 1991.
T. Imai, Y. Hayashi, N. Ohkawa, T. Sugie, Y. Ichihashi, and T. Ito, “Field demonstration of 2.5 Gbit/s coherent optical transmission through installed submarine fibre cables,” Electron. Lett., vol. 26, no. 17, pp. 1407–1409, 1990.
S. Norimatsu, K. Iwashita, and K. Sato, “PSK optical homodyne detection using external cavity laser diodes in Costas loop,” IEEE Photon. Technol. Lett., vol. 2, no. 5, pp. 374–376, 1990.
F. Koyama and K. Iga, “Frequency chirping in external modulators,” J. Lightw. Technol., vol. LT-6, no. 1, pp. 87–93, 1988.
A. W. Davis, M. J. Pettitt, P. J. King, and S. Wright, “Phase diversity techniques for coherent optical receivers,” J. Lightw. Technol., vol. 5, no. 4, pp. 561–572, 1987.
R. J. Mears, L. Reekie, I. M. Jauncey, and D. N. Payne, “Low-noise Erbium-doped fibre amplifier at 1.54 $\mu$m,” Electron. Lett., vol. 23, no. 19, pp. 1026–1028, 1987.
B. Glance, “Polarization independent coherent optical receiver,” J. Lightw. Technol., vol. LT-5, no. 2, pp. 274–276, 1987.
Y. Yamamoto and H. Haus, “Preparation, measurement and information capacity of optical quantum states,” Rev. Mod. Phys., vol. 58, no. 4, pp. 1001–1020, 1986.
H. Hodgikinson, R. A. Harmon, and D. W. Smith, Demodulation of optical DPSK using in-phase and quadrature detection,” Electron. Lett., vol. 21, no. 19, pp. 867–868, 1985.
K. Kikuchi and T. Okoshi, “Measurement of FM noise, AM noise, and field spectra of 1.3 $\mu$m InGaAsP DFB lasers and determination of the linewidth enhancement factor,” IEEE J. Quantum Electron., vol. QE-21, no. 11, pp. 1814–1818, 1985.
K. Kikuchi, T. Okoshi, M. Nagamatsu, and N. Henmi, “Degradation of bit-error rate in coherent optical communications due to spectral spread of the transmitter and the local oscillator,” J. Lightw. Technol., vol. LT-2, no. 6, pp. 1024–1033, 1984.
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C. H. Henry, “Theory of the linewidth of semiconductor lasers,” IEEE J. Quantum Electron., vol. QE-18, no. 2, pp. 259–264, 1982.
T. Okoshi, K. Emura, K. Kikuchi, and R. Th. Kersten, “Computation of bit-error rate of various heterodyne and coherent-type optical communication schemes,” J. Opt. Commun., vol. 2, no. 4, pp. 134–141, 1981.
T. Okoshi and K. Kikuchi, “Frequency stabilization of semiconductor lasers for heterodyne-type optical communication systems,” Electron. Lett., vol. 16, no. 5, pp. 179–181, 1980.
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E. Yamazaki, S. Yamanaka, Y. Kisaka, T. Nakagawa, K. Murata, E. Yoshida, T. Sakano, M. Tomizawa, Y. Miyamoto, S. Matsuoka, J. Matsui, A. Shibayama, J. Abe, Y. Nakamura, H. Noguchi, K. Fukuchi, H. Onaka, K. Fukumitsu, K. Komaki, O. Takeuchi, Y. Sakamoto, H. Nakashima, T. Mizuochi, K. Kubo, Y. Miyata, H. Nishimoto, S. Hirano, and K. Onohara, “Fast optical channel recovery in field demonstration of 100-Gbit/s Ethernet over OTN using real-time DSP,” Opt. Exp., vol. 19, no. 14, pp. 13139–13184, 2011.
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M. Karlsson and E. Agrell, “Which is the most power-efficient modulation format in optical links?” Opt. Exp., vol. 17, no. 13, pp. 10814–10819, 2009.
E. Agrell and M. Karlsson, “Power-efficient modulation formats in coherent transmission systems,” J. Lightw. Technol., vol. 27, no. 22, pp. 5115–5126, 2009.
F. Pancaldi, G. M. Vitetta, R. Kalbasi, N. Al-Dhahir, M. Uysal, and H. Mheidat, “Single-carrier frequency domain equalization,” IEEE Signal Process. Mag., vol. 25, no. 5, pp. 37–56, 2008.
S. G. Evangelides, Jr., L. F. Mollenauer, J. P. Gordon, and N. S. Bergano, “Polarization multiplexing with solitons,” J. Lightw. Technol., vol. 10, no. 1, pp. 28–35, 1992.
Y. Cai, D. G. Foursa, C. R. Davidson, J. X. Cai, O. Sinkin, M. Nissov, and A. Philipetskii, “Experimental demonstration of coherent MAP detection for nonlinearity mitigation in long-haul transmission,” presented at the Optical Fiber Communication Conf., San Diego, CA, USA, , 2010, Paper OTuE1.
Y. Cai, D. G. Foursa, C. R. Davidson, J. X. Cai, O. Sinkin, M. Nissov, and A. Philipetskii, “Experimental demonstration of coherent MAP detection for nonlinearity mitigation in long-haul transmission,” presented at the Optical Fiber Communication Conf., San Diego, CA, USA, , 2010, Paper OTuE1.
R. Griffin and A. Carter, “Optical differential quadrature phase-shift key (oDQPSK) for high capacity optical transmission,” presented at the Optical Fiber Communication Conf., Anaheim, CA, USA, Mar. 17–22, 2002, Paper WX6.
X. Liu, A. R. Chraplyvy, P. J. Winzer, R. W. Tkach, and S. Chandrasekhar, “Phase-conjugated twin waves for communication beyond the Kerr nonlinearity limit,” Nature Photon., vol. 7, no. 7, pp. 560–568, 2013.
X. Liu, A. R. Chraplyvy, P. J. Winzer, R. W. Tkach, and S. Chandrasekhar, “Phase-conjugated twin waves for communication beyond the Kerr nonlinearity limit,” Nature Photon., vol. 7, no. 7, pp. 560–568, 2013.
K. Roberts, L. Chuandong, L. Strawczynski, M. O'Sullivan, and I. Hardcastle, “Electronic precompensation of optical nonlinearity,” IEEE Photon. Technol. Lett., vol. 18, no. 2, pp. 403–405, 2006.
L. Coelho and N. Hanik, “Global optimization of fiber-optic communication systems using four-dimensional modulation formats,” presented at the European Conf. Optical Communication, Geneva, Switzerland, , 2011, Paper Mo.2.B.
Y. Cai, D. G. Foursa, C. R. Davidson, J. X. Cai, O. Sinkin, M. Nissov, and A. Philipetskii, “Experimental demonstration of coherent MAP detection for nonlinearity mitigation in long-haul transmission,” presented at the Optical Fiber Communication Conf., San Diego, CA, USA, , 2010, Paper OTuE1.
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L. Dou, Y. Zhao, Z. Tao, Y. Fan, T. Hoshida, and J. C. Rasmussen, “Advanced digital nonlinear distortion compensation,” presented at Optical Fiber Communication Conf., Los Angeles, CA, USA, , 2015, Paper Th3G.3.
T. Okoshi, K. Emura, K. Kikuchi, and R. Th. Kersten, “Computation of bit-error rate of various heterodyne and coherent-type optical communication schemes,” J. Opt. Commun., vol. 2, no. 4, pp. 134–141, 1981.
S. G. Evangelides, Jr., L. F. Mollenauer, J. P. Gordon, and N. S. Bergano, “Polarization multiplexing with solitons,” J. Lightw. Technol., vol. 10, no. 1, pp. 28–35, 1992.
L. Dou, Y. Zhao, Z. Tao, Y. Fan, T. Hoshida, and J. C. Rasmussen, “Advanced digital nonlinear distortion compensation,” presented at Optical Fiber Communication Conf., Los Angeles, CA, USA, , 2015, Paper Th3G.3.
Md. S. Faruk and K. Kikuchi, “Adaptive frequency-domain equalization in digital coherent receivers,” Opt. Exp., vol. 19, no. 13, pp. 12789–12798, 2011.
Md. S. Faruk, Y. Mori, C. Zhang, K. Igarashi, and K. Kikuchi, “Multi-impairment monitoring from adaptive finite-impulse-response filters in a digital coherent receiver,” Opt. Exp., vol. 18, no. 26, pp. 26929–26936. 2010.
F. Favre and D. LeGuen, “High frequency stability of laser diode for heterodyne communication systems,” Electron. Lett., vol. 16, no. 18, pp. 709–710, 1980.
L. E. Nelson, S. L. Woodward, M. D. Feuer, X. Zhou, P. D. Magill, S. Foo, D. Hanson, D. McGhan, H. Sun, M. Moyer, and M. O'Sullivan, “Performance of a 46-Gb/s dual-polarization QPSK transceiver in a high-PMD fiber transmission experiment,” presented at the Optical Fiber Communication Conf., San Diego, CA, USA, , 2008, Paper PDP9.
L. E. Nelson, S. L. Woodward, M. D. Feuer, X. Zhou, P. D. Magill, S. Foo, D. Hanson, D. McGhan, H. Sun, M. Moyer, and M. O'Sullivan, “Performance of a 46-Gb/s dual-polarization QPSK transceiver in a high-PMD fiber transmission experiment,” presented at the Optical Fiber Communication Conf., San Diego, CA, USA, , 2008, Paper PDP9.
Y. Cai, D. G. Foursa, C. R. Davidson, J. X. Cai, O. Sinkin, M. Nissov, and A. Philipetskii, “Experimental demonstration of coherent MAP detection for nonlinearity mitigation in long-haul transmission,” presented at the Optical Fiber Communication Conf., San Diego, CA, USA, , 2010, Paper OTuE1.
E. Yamazaki, S. Yamanaka, Y. Kisaka, T. Nakagawa, K. Murata, E. Yoshida, T. Sakano, M. Tomizawa, Y. Miyamoto, S. Matsuoka, J. Matsui, A. Shibayama, J. Abe, Y. Nakamura, H. Noguchi, K. Fukuchi, H. Onaka, K. Fukumitsu, K. Komaki, O. Takeuchi, Y. Sakamoto, H. Nakashima, T. Mizuochi, K. Kubo, Y. Miyata, H. Nishimoto, S. Hirano, and K. Onohara, “Fast optical channel recovery in field demonstration of 100-Gbit/s Ethernet over OTN using real-time DSP,” Opt. Exp., vol. 19, no. 14, pp. 13139–13184, 2011.
E. Yamazaki, S. Yamanaka, Y. Kisaka, T. Nakagawa, K. Murata, E. Yoshida, T. Sakano, M. Tomizawa, Y. Miyamoto, S. Matsuoka, J. Matsui, A. Shibayama, J. Abe, Y. Nakamura, H. Noguchi, K. Fukuchi, H. Onaka, K. Fukumitsu, K. Komaki, O. Takeuchi, Y. Sakamoto, H. Nakashima, T. Mizuochi, K. Kubo, Y. Miyata, H. Nishimoto, S. Hirano, and K. Onohara, “Fast optical channel recovery in field demonstration of 100-Gbit/s Ethernet over OTN using real-time DSP,” Opt. Exp., vol. 19, no. 14, pp. 13139–13184, 2011.
B. Glance, “Polarization independent coherent optical receiver,” J. Lightw. Technol., vol. LT-5, no. 2, pp. 274–276, 1987.
D. N. Godard, “Self-recovering equalization and carrier tracking in two-dimensional data communication systems,” IEEE Trans. Commun., vol. COM-28, no. 11, pp. 1867–1875, 1980.
S. G. Evangelides, Jr., L. F. Mollenauer, J. P. Gordon, and N. S. Bergano, “Polarization multiplexing with solitons,” J. Lightw. Technol., vol. 10, no. 1, pp. 28–35, 1992.
R. Griffin and A. Carter, “Optical differential quadrature phase-shift key (oDQPSK) for high capacity optical transmission,” presented at the Optical Fiber Communication Conf., Anaheim, CA, USA, Mar. 17–22, 2002, Paper WX6.
F. P. Guiomar, J. D. Reis, A. L. Teixeira, and A. N. Pinto, “Mitigation of intra-channel nonlinearities using a frequency-domain Volterra series equalizer,” Opt. Exp., vol. 20, no. 2, pp. 1360–1368, 2012.
L. Coelho and N. Hanik, “Global optimization of fiber-optic communication systems using four-dimensional modulation formats,” presented at the European Conf. Optical Communication, Geneva, Switzerland, , 2011, Paper Mo.2.B.
L. E. Nelson, S. L. Woodward, M. D. Feuer, X. Zhou, P. D. Magill, S. Foo, D. Hanson, D. McGhan, H. Sun, M. Moyer, and M. O'Sullivan, “Performance of a 46-Gb/s dual-polarization QPSK transceiver in a high-PMD fiber transmission experiment,” presented at the Optical Fiber Communication Conf., San Diego, CA, USA, , 2008, Paper PDP9.
K. Roberts, L. Chuandong, L. Strawczynski, M. O'Sullivan, and I. Hardcastle, “Electronic precompensation of optical nonlinearity,” IEEE Photon. Technol. Lett., vol. 18, no. 2, pp. 403–405, 2006.
H. Hodgikinson, R. A. Harmon, and D. W. Smith, Demodulation of optical DPSK using in-phase and quadrature detection,” Electron. Lett., vol. 21, no. 19, pp. 867–868, 1985.
Y. Yamamoto and H. Haus, “Preparation, measurement and information capacity of optical quantum states,” Rev. Mod. Phys., vol. 58, no. 4, pp. 1001–1020, 1986.
T. Imai, Y. Hayashi, N. Ohkawa, T. Sugie, Y. Ichihashi, and T. Ito, “Field demonstration of 2.5 Gbit/s coherent optical transmission through installed submarine fibre cables,” Electron. Lett., vol. 26, no. 17, pp. 1407–1409, 1990.
S. Haykin, Introduction to Adaptive Filters, New York, NY, USA: Macmillan, 2001, ch. 4.
K. Kikuchi, T. Okoshi, M. Nagamatsu, and N. Henmi, “Degradation of bit-error rate in coherent optical communications due to spectral spread of the transmitter and the local oscillator,” J. Lightw. Technol., vol. LT-2, no. 6, pp. 1024–1033, 1984.
C. H. Henry, “Theory of the linewidth of semiconductor lasers,” IEEE J. Quantum Electron., vol. QE-18, no. 2, pp. 259–264, 1982.
E. Yamazaki, S. Yamanaka, Y. Kisaka, T. Nakagawa, K. Murata, E. Yoshida, T. Sakano, M. Tomizawa, Y. Miyamoto, S. Matsuoka, J. Matsui, A. Shibayama, J. Abe, Y. Nakamura, H. Noguchi, K. Fukuchi, H. Onaka, K. Fukumitsu, K. Komaki, O. Takeuchi, Y. Sakamoto, H. Nakashima, T. Mizuochi, K. Kubo, Y. Miyata, H. Nishimoto, S. Hirano, and K. Onohara, “Fast optical channel recovery in field demonstration of 100-Gbit/s Ethernet over OTN using real-time DSP,” Opt. Exp., vol. 19, no. 14, pp. 13139–13184, 2011.
J. M. Kahn and K.-P. Ho, “Spectral efficiency limits and modulation/detection techniques for DWDM systems,” IEEE J. Sel. Topics Quantum Electron., vol. 10, no. 2, pp. 259–272, 2004.
H. Hodgikinson, R. A. Harmon, and D. W. Smith, Demodulation of optical DPSK using in-phase and quadrature detection,” Electron. Lett., vol. 21, no. 19, pp. 867–868, 1985.
N. Shibata, Y. Sasaki, K. Okamoto, and T. Hosaka, “Fabrication of polarization-maintaining and absorption-reducing fibers,” J. Lightw. Technol., vol. LT-1, no. 1, pp. 38–43, 1983.
L. Dou, Y. Zhao, Z. Tao, Y. Fan, T. Hoshida, and J. C. Rasmussen, “Advanced digital nonlinear distortion compensation,” presented at Optical Fiber Communication Conf., Los Angeles, CA, USA, , 2015, Paper Th3G.3.
T. Imai, Y. Hayashi, N. Ohkawa, T. Sugie, Y. Ichihashi, and T. Ito, “Field demonstration of 2.5 Gbit/s coherent optical transmission through installed submarine fibre cables,” Electron. Lett., vol. 26, no. 17, pp. 1407–1409, 1990.
F. Koyama and K. Iga, “Frequency chirping in external modulators,” J. Lightw. Technol., vol. LT-6, no. 1, pp. 87–93, 1988.
Md. S. Faruk, Y. Mori, C. Zhang, K. Igarashi, and K. Kikuchi, “Multi-impairment monitoring from adaptive finite-impulse-response filters in a digital coherent receiver,” Opt. Exp., vol. 18, no. 26, pp. 26929–26936. 2010.
Y. Mori, C. Zhang, K. Igarashi, K. Katoh, and K. Kikuchi, “Unrepeated 200-km transmission of 40-Gbit/s 16-QAM signals using digital coherent receiver,” Opt. Exp., vol. 17, no. 32, pp. 1435–1441, 2009.
T. Imai, Y. Hayashi, N. Ohkawa, T. Sugie, Y. Ichihashi, and T. Ito, “Field demonstration of 2.5 Gbit/s coherent optical transmission through installed submarine fibre cables,” Electron. Lett., vol. 26, no. 17, pp. 1407–1409, 1990.
E. Ip and J. M. Kahn, “Compensation of dispersion and nonlinear impairments using digital backpropagation,” J. Lightw. Technol., vol. 26, no. 20, pp. 3416–3425, 2008.
R. Kudo, T. Kobayashi, K. Ishihara, Y. Takatori, A. Sano, and Y. Miyamoto, “Coherent optical single carrier transmission using overlap frequency domain equalization for long-haul optical systems,” J. Lightw. Technol., vol. 27, no. 16, pp. 3721–3718, 2009.
S. Tsukamoto, Y. Ishikawa, and K. Kikuchi, “Optical homodyne receiver comprising phase and polarization diversities with digital signal processing,” presented at the European Conf. on Optical Communication, Cannes, France, , 2006, Paper Mo4.2.1.
S. Ishimura and K. Kikuchi, “Multi-dimensional permutation-modulation format for coherent optical communications,” Opt. Exp., vol. 23, no. 12, pp. 15587–15597, 2015.
T. Imai, Y. Hayashi, N. Ohkawa, T. Sugie, Y. Ichihashi, and T. Ito, “Field demonstration of 2.5 Gbit/s coherent optical transmission through installed submarine fibre cables,” Electron. Lett., vol. 26, no. 17, pp. 1407–1409, 1990.
S. Norimatsu, K. Iwashita, and K. Sato, “PSK optical homodyne detection using external cavity laser diodes in Costas loop,” IEEE Photon. Technol. Lett., vol. 2, no. 5, pp. 374–376, 1990.
S. Shimotsu, S. Oikawa, T. Saitou, N. Mitsugi, K. Kubodera, T. Kawanishi, and M. Izutsu, “Single side-band modulation performance of a LiNbO$_3$ integrated modulator consisting of four-phase modulator waveguides,” IEEE Photon. Technol. Lett., vol. 13, no. 4, pp. 364–366, 2001.
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Y. Mori, C. Zhang, K. Igarashi, K. Katoh, and K. Kikuchi, “Unrepeated 200-km transmission of 40-Gbit/s 16-QAM signals using digital coherent receiver,” Opt. Exp., vol. 17, no. 32, pp. 1435–1441, 2009.
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