M. E. McCarthy, J. Zhao, A. D. Ellis, P. Gunning, "Full-field electronic dispersion compensation of 10
Gbit/s OOK without Raman amplification over 4$\,\times\,$124 km field-installed SSF," J. Lightw. Technol. 27, 5327-5335 (2009).

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. 16, 889-896 (2008).

M. Yoshida, H. Goto, K. Kasai, M. Nakazawa, "64 and 128 coherent QAM optical transmission over 150
km using frequency-stabilized laser and heterodyne PLL detection," Opt. Exp. 16, 829-840 (2008).

N. Kikuchi, K. Mandai, K. Sekine, S. Sasaki, "Incoherent 32-level optical multilevel signalling
technoloigies," J. Lightw. Technol. 26, 150-157 (2008).

E. Ip, A. P. T. Lau, D. J. F. Barros, J. M. Khan, "Coherent detection in optical fiber systems," Opt. Exp. 16, 753-791 (2008).

H. Goto, M. Yoshida, T. Omiya, K. Kasai, M. Nakazawa, "Polarisation and frequency division multiplexed 1G
symbol/s, 64 QAM coherent optical transmission with 8.6 b/s/Hz
spectral efficiency over 160 km," IEICE Electron. Exp. 5, 776-781 (2008).

S. Oda, H. Sunnerud, P. A. Andrekson, "High efficiency and high output power fiber-optic
parametric amplifier," Opt. Lett. 32, 1776-1778 (2007).

A. J. Lowery, "Fiber nonlinearity pre- and post-compensation for
long-haul optical links using OFDM," Opt. Exp. 15, 12965- (2007).

E. Yamazaki, F. Inuzuka, K. Yonenaga, A. Takada, M. Koga, "Compensation of interchannel crosstalk induced by
optical fiber nonlinearity in carrier phase-locked WDM system," IEEE Photon. Technol. Lett. 19, 9-11 (2007).

K. Roberts, C. Li, L. Strawczynski, M. O'Sullivan, I. Hardcastle, "Electronic precompensation of optical nonlinearity," IEEE Photon. Technol. Lett. 18, 403-405 (2006).

E. Pincemin, A. Tan, A. Bezard, A. Tonello, S. Wabnitz, J.-D. Ania-Castañòn, S. Turitsyn, "Robustness of 40 Gb/s ASK modulation formats in the
practical system infrastructure," Opt. Exp. 14, 12049-12062 (2006).

E. B. Desurvire, "Capacity demand and technology challenges for
lightwave systems in the next two decades," J. Lightw. Technol. 24, 4697-4710 (2006).

A. J. Lowery, J. Armstrong, "Orthogonal frequency division multiplexing for
dispersion compensation of long-haul optical systems," Opt. Exp. 2006 14, 2079-2084 (2006).

I. B. Djordjevic, B. Vasic, "100-Gb/s transmission using orthogonal
frequency-division multiplexing," IEEE Photon. Technol. Lett. 18, 1576-1578 (2006).

A. D. Ellis, F. C. G. Gunning, "Spectral density enhancement using coherent WDM," IEEE Photon. Technol. Lett. 17, 504-506 (2005).

P. J. Roberts, F. Couny, H. Sabert, B. Mangan, D. Williams, L. Farr, M. Mason, A. Tomlinson, T. Birks, J. Knight, P. St. J. Russell, "Ultimate low loss of hollow-core photonic crystal
fibres," Opt. Exp. 13, 236-244 (2005).

C. Rasmussen, T. Fjelde, J. Bennike, L. Fenghai, S. Dey, B. Mikkelsen, P. Mamyshev, P. Serbe, P. van der Wagt, Y. Akasaka, D. Harris, D. Gapontsev, V. Ivshin, P. Reeves-Hall, "DWDM 40 G transmission over trans-pacific distance (10
000 km) using CSRZ-DPSK, enhanced FEC, and all-Raman-amplified
100-km ultrawave fiber spans," J. Lightw. Technol. 21, 203-207 (2004).

J. M. Kahn, K.-P. Ho, "Spectral efficiency limits and modulation/detection
techniques for DWDM systems," IEEE J. Sel. Topics Quantum Electron. 10, 259-272 (2004).

M. G. Taylor, "Coherent detection method using DSP for demodulation
of signal and subsequent equalization of propagation impairments," IEEE Photon. Technol. Lett. 16, 674-676 (2004).

L. G. L. Wegener, B. M. L. Povinelli, A. G. Green, P. P. Mitra, J. B. Stark, P. B. Littlewood, "The effect of propagation nonlinearities on the
information capacity of WDM optical fiber systems: Cross-phase
modulation and four-wave mixing," Physica D: Nonlinear Phenomena 189, 81-99 (2004).

C. Xu, X. Liu, X. Wei, "Differential phase-shift keying for high spectral
efficiency optical transmissions," IEEE J. Sel. Topics Quantum Electron. 10, 281-293 (2004).

L. Thylen, E. Berglind, O. Nilsson, "Channel capacity of optical fibres," Private Communication (2002).

X. Liu, X. Wei, R. E. Slusher, C. J. McKinstrie, "Improving transmission performance in differnetioal
phase-shift-keyed systems by use of lumped nonlinear phase-shift
compensation," Opt. Lett. 27, 1616-1618 (2002).

J. Armstrong, "Peak-to-average power reduction for OFDM by repeated
clipping and frequency domain filtering," Electron. Lett. 38, 246-248 (2002).

S. Y. Chung, G. D. Forney, T. J. Richardson, R. Urbanke, "On the design of low density parity check codes within
0.0045 dB of the Shannon limit," IEEE Commun. Lett. 5, 58-60 (2001).

P. P. Mitra, J. B. Stark, "Nonlinear limits to the information capacity of
optical fibre communications," Nature 411, 1027-1030 (2001).

J. B. Stark, P. P. Mitra, A. Sengupta, "Information capacity for optical communication
channels," Opt. Fiber Technol. 7, 275- (2001).

A. Mecozzi, M. Shtaif, "On the capacity of intensity modulated systems using
optical amplifiers," IEEE Photon. Technol. Lett. 13, 1029-1031 (2001).

R.-J. Essiambre, B. Mikkelsen, G. Raybon, "Intra-channel cross-phase modulation and four-wave
mixing in high-speed TDM systems," Electron. Lett. 35, 1576-1578 (1999).

H. J. Thiele, R. I. Killey, P. Bayvel, "Influence of fibre dispersion and bit rate on
cross-phase-modulation-induced distortion in amplified optical fibre
links," Electron. Lett. 34, 2050-2051 (1998).

A. Krier, Y. Mao, "High performance uncooled InAsSbP/InGaAs photodiodes
for the 1.8–3.4 $\mu$m wavelength range," Infrared Phys. Technol. 38, 397-403 (1997).

S. Watanabe, M. Shirasaki, "Exact compensation for both chromatic dispersion and
Kerr effect in a transmission fiber using optical phase conjugation," J. Lightw. Technol. 14, 243-248 (1996).

P. V. Mamyshev, L. F. Mollenauer, "Pseudo-phase-matched four-wave mixing in soliton
wavelength-division multiplexing transmission," Opt. Lett. 21, 396-398 (1996).

N. J. Smith, N. J. Doran, "Modulational instabilities in fibers with periodic
dispersion management," Opt. Lett. 21, 570-572 (1996).

C. K. Ramaiah, "Bulletin board systems for libraries," DESIDOC Bull. Inf. Technol. 15, 23-31 (1995).

R. M. Percival, D. Szebesta, C. P. Seltzer, S. D. Perin, S. T. Devey, M. Louka, "A 1.6- $\mu$m pumped 1.9- $\mu$m thulium-doped fluoride fiber laser and amplifier of very
high efficiency," IEEE J. Quantum Electron. 31, 489-493 (1995).

A. D. Ellis, S. J. Pycock, D. A. Cleland, C. H. F. Sturrock, "Dispersion compensation in a 450 km transmission
system employing standard fibre," Electron. Lett. 28, 954 (1992).

W. Pieper, C. Kurtze, R. Schnabel, D. Bruer, R. Ludwig, K. Petermann, "Nonlinearity insensitive standard fibre transmission
based on optical phase conjugation in a semiconductor amplifier," Electron. Lett. 30, 724-725 (1992).

A. D. Ellis, J. D. Cox, D. Bird, J. Regnault, J. V. Wright, W. A. Stallard, "5 Gbit/s soliton propagation over 350 km with large
periodic dispersion coefficient perturbations using erbium doped
fibre amplifier repeaters," Electron. Lett. 27, 878- (1991).

D. J. Malyon, T. Widdowson, E. G. Bryant, S. F. Carter, J. V. Wright, W. A. Stallard, "Demonstration of optical pulse propagation over 10000
km of fibre using recirculating loop," Electron. Lett. 27, 120-121 (1991).

Y. Kodama, S. Wabnitz, "Reduction of soliton interaction forces by bandwidth
limited amplification," Electron. Lett. 27, 1931-1932 (1991).

A. D. Ellis, W. A. Stallard, "Four wave mixing in ultra long transmission systems
incorporating linear amplifiers," IEE Colloquium, No. 159 (1990).

L. Wood, D. Blankenhdn, "State of the BBS nation: Behold lowly bulletin board
now encompassing the globe," Byte 15, 298-304 (1990).

J. H. Winters, R. D. Gitlin, "Electronic signal processing techniques in long haul
fiber optic systems," IEEE Trans. Commun. 38, 1439-1453 (1990).

H. A. Haus, Y. Yamamoto, "Quantum circuit theory of phase sensitive linear
systems," IEEE J. Quantum Electron. QE-23, 212-221 (1987).

T. Miki, H. Ishio, "Viabilities of the wavelength-division-multiplexing
transmission system over an optical fiber cable," IEEE Trans. Commun. 26, 1082-1087 (1978).

R. W. Chang, "Synthesis of band-limited orthogonal signals for
multichannel data transmission," Bell Syst. Tech. J. 45, 1775-1796 (1966).

R. R. Mosier, R. G. Clabaugh, "Kineplex, a bandwidth efficient binary transmission
system," AIEE Trans. 76, 723-728 (1958).

C. E. Shannon, "A mathematical theory of communication," Bell Syst. Tech. J. 27, 379–423, 623-656 (1948).

R. R. Mosier, R. G. Clabaugh, "Kineplex, a bandwidth efficient binary transmission
system," AIEE Trans. 76, 723-728 (1958).

C. E. Shannon, "A mathematical theory of communication," Bell Syst. Tech. J. 27, 379–423, 623-656 (1948).

R. W. Chang, "Synthesis of band-limited orthogonal signals for
multichannel data transmission," Bell Syst. Tech. J. 45, 1775-1796 (1966).

L. Wood, D. Blankenhdn, "State of the BBS nation: Behold lowly bulletin board
now encompassing the globe," Byte 15, 298-304 (1990).

C. K. Ramaiah, "Bulletin board systems for libraries," DESIDOC Bull. Inf. Technol. 15, 23-31 (1995).

J. Armstrong, "Peak-to-average power reduction for OFDM by repeated
clipping and frequency domain filtering," Electron. Lett. 38, 246-248 (2002).

D. J. Malyon, T. Widdowson, E. G. Bryant, S. F. Carter, J. V. Wright, W. A. Stallard, "Demonstration of optical pulse propagation over 10000
km of fibre using recirculating loop," Electron. Lett. 27, 120-121 (1991).

H. J. Thiele, R. I. Killey, P. Bayvel, "Influence of fibre dispersion and bit rate on
cross-phase-modulation-induced distortion in amplified optical fibre
links," Electron. Lett. 34, 2050-2051 (1998).

R.-J. Essiambre, B. Mikkelsen, G. Raybon, "Intra-channel cross-phase modulation and four-wave
mixing in high-speed TDM systems," Electron. Lett. 35, 1576-1578 (1999).

A. D. Ellis, J. D. Cox, D. Bird, J. Regnault, J. V. Wright, W. A. Stallard, "5 Gbit/s soliton propagation over 350 km with large
periodic dispersion coefficient perturbations using erbium doped
fibre amplifier repeaters," Electron. Lett. 27, 878- (1991).

A. D. Ellis, S. J. Pycock, D. A. Cleland, C. H. F. Sturrock, "Dispersion compensation in a 450 km transmission
system employing standard fibre," Electron. Lett. 28, 954 (1992).

W. Pieper, C. Kurtze, R. Schnabel, D. Bruer, R. Ludwig, K. Petermann, "Nonlinearity insensitive standard fibre transmission
based on optical phase conjugation in a semiconductor amplifier," Electron. Lett. 30, 724-725 (1992).

Y. Kodama, S. Wabnitz, "Reduction of soliton interaction forces by bandwidth
limited amplification," Electron. Lett. 27, 1931-1932 (1991).

A. D. Ellis, W. A. Stallard, "Four wave mixing in ultra long transmission systems
incorporating linear amplifiers," IEE Colloquium, No. 159 (1990).

S. Y. Chung, G. D. Forney, T. J. Richardson, R. Urbanke, "On the design of low density parity check codes within
0.0045 dB of the Shannon limit," IEEE Commun. Lett. 5, 58-60 (2001).

H. A. Haus, Y. Yamamoto, "Quantum circuit theory of phase sensitive linear
systems," IEEE J. Quantum Electron. QE-23, 212-221 (1987).

R. M. Percival, D. Szebesta, C. P. Seltzer, S. D. Perin, S. T. Devey, M. Louka, "A 1.6- $\mu$m pumped 1.9- $\mu$m thulium-doped fluoride fiber laser and amplifier of very
high efficiency," IEEE J. Quantum Electron. 31, 489-493 (1995).

J. M. Kahn, K.-P. Ho, "Spectral efficiency limits and modulation/detection
techniques for DWDM systems," IEEE J. Sel. Topics Quantum Electron. 10, 259-272 (2004).

C. Xu, X. Liu, X. Wei, "Differential phase-shift keying for high spectral
efficiency optical transmissions," IEEE J. Sel. Topics Quantum Electron. 10, 281-293 (2004).

K. Roberts, C. Li, L. Strawczynski, M. O'Sullivan, I. Hardcastle, "Electronic precompensation of optical nonlinearity," IEEE Photon. Technol. Lett. 18, 403-405 (2006).

A. Mecozzi, M. Shtaif, "On the capacity of intensity modulated systems using
optical amplifiers," IEEE Photon. Technol. Lett. 13, 1029-1031 (2001).

M. G. Taylor, "Coherent detection method using DSP for demodulation
of signal and subsequent equalization of propagation impairments," IEEE Photon. Technol. Lett. 16, 674-676 (2004).

A. D. Ellis, F. C. G. Gunning, "Spectral density enhancement using coherent WDM," IEEE Photon. Technol. Lett. 17, 504-506 (2005).

I. B. Djordjevic, B. Vasic, "100-Gb/s transmission using orthogonal
frequency-division multiplexing," IEEE Photon. Technol. Lett. 18, 1576-1578 (2006).

E. Yamazaki, F. Inuzuka, K. Yonenaga, A. Takada, M. Koga, "Compensation of interchannel crosstalk induced by
optical fiber nonlinearity in carrier phase-locked WDM system," IEEE Photon. Technol. Lett. 19, 9-11 (2007).

T. Miki, H. Ishio, "Viabilities of the wavelength-division-multiplexing
transmission system over an optical fiber cable," IEEE Trans. Commun. 26, 1082-1087 (1978).

J. H. Winters, R. D. Gitlin, "Electronic signal processing techniques in long haul
fiber optic systems," IEEE Trans. Commun. 38, 1439-1453 (1990).

H. Goto, M. Yoshida, T. Omiya, K. Kasai, M. Nakazawa, "Polarisation and frequency division multiplexed 1G
symbol/s, 64 QAM coherent optical transmission with 8.6 b/s/Hz
spectral efficiency over 160 km," IEICE Electron. Exp. 5, 776-781 (2008).

A. Krier, Y. Mao, "High performance uncooled InAsSbP/InGaAs photodiodes
for the 1.8–3.4 $\mu$m wavelength range," Infrared Phys. Technol. 38, 397-403 (1997).

C. Rasmussen, T. Fjelde, J. Bennike, L. Fenghai, S. Dey, B. Mikkelsen, P. Mamyshev, P. Serbe, P. van der Wagt, Y. Akasaka, D. Harris, D. Gapontsev, V. Ivshin, P. Reeves-Hall, "DWDM 40 G transmission over trans-pacific distance (10
000 km) using CSRZ-DPSK, enhanced FEC, and all-Raman-amplified
100-km ultrawave fiber spans," J. Lightw. Technol. 21, 203-207 (2004).

S. Watanabe, M. Shirasaki, "Exact compensation for both chromatic dispersion and
Kerr effect in a transmission fiber using optical phase conjugation," J. Lightw. Technol. 14, 243-248 (1996).

M. E. McCarthy, J. Zhao, A. D. Ellis, P. Gunning, "Full-field electronic dispersion compensation of 10
Gbit/s OOK without Raman amplification over 4$\,\times\,$124 km field-installed SSF," J. Lightw. Technol. 27, 5327-5335 (2009).

E. B. Desurvire, "Capacity demand and technology challenges for
lightwave systems in the next two decades," J. Lightw. Technol. 24, 4697-4710 (2006).

N. Kikuchi, K. Mandai, K. Sekine, S. Sasaki, "Incoherent 32-level optical multilevel signalling
technoloigies," J. Lightw. Technol. 26, 150-157 (2008).

P. P. Mitra, J. B. Stark, "Nonlinear limits to the information capacity of
optical fibre communications," Nature 411, 1027-1030 (2001).

E. Pincemin, A. Tan, A. Bezard, A. Tonello, S. Wabnitz, J.-D. Ania-Castañòn, S. Turitsyn, "Robustness of 40 Gb/s ASK modulation formats in the
practical system infrastructure," Opt. Exp. 14, 12049-12062 (2006).

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. 16, 889-896 (2008).

E. Ip, A. P. T. Lau, D. J. F. Barros, J. M. Khan, "Coherent detection in optical fiber systems," Opt. Exp. 16, 753-791 (2008).

P. J. Roberts, F. Couny, H. Sabert, B. Mangan, D. Williams, L. Farr, M. Mason, A. Tomlinson, T. Birks, J. Knight, P. St. J. Russell, "Ultimate low loss of hollow-core photonic crystal
fibres," Opt. Exp. 13, 236-244 (2005).

M. Yoshida, H. Goto, K. Kasai, M. Nakazawa, "64 and 128 coherent QAM optical transmission over 150
km using frequency-stabilized laser and heterodyne PLL detection," Opt. Exp. 16, 829-840 (2008).

A. J. Lowery, "Fiber nonlinearity pre- and post-compensation for
long-haul optical links using OFDM," Opt. Exp. 15, 12965- (2007).

A. J. Lowery, J. Armstrong, "Orthogonal frequency division multiplexing for
dispersion compensation of long-haul optical systems," Opt. Exp. 2006 14, 2079-2084 (2006).

J. B. Stark, P. P. Mitra, A. Sengupta, "Information capacity for optical communication
channels," Opt. Fiber Technol. 7, 275- (2001).

X. Liu, X. Wei, R. E. Slusher, C. J. McKinstrie, "Improving transmission performance in differnetioal
phase-shift-keyed systems by use of lumped nonlinear phase-shift
compensation," Opt. Lett. 27, 1616-1618 (2002).

P. V. Mamyshev, L. F. Mollenauer, "Pseudo-phase-matched four-wave mixing in soliton
wavelength-division multiplexing transmission," Opt. Lett. 21, 396-398 (1996).

N. J. Smith, N. J. Doran, "Modulational instabilities in fibers with periodic
dispersion management," Opt. Lett. 21, 570-572 (1996).

S. Oda, H. Sunnerud, P. A. Andrekson, "High efficiency and high output power fiber-optic
parametric amplifier," Opt. Lett. 32, 1776-1778 (2007).

L. G. L. Wegener, B. M. L. Povinelli, A. G. Green, P. P. Mitra, J. B. Stark, P. B. Littlewood, "The effect of propagation nonlinearities on the
information capacity of WDM optical fiber systems: Cross-phase
modulation and four-wave mixing," Physica D: Nonlinear Phenomena 189, 81-99 (2004).

L. Thylen, E. Berglind, O. Nilsson, "Channel capacity of optical fibres," Private Communication (2002).

I. Morita, N. Edagawa, "50 GHz-spaced 64$\,\times\,$42.7 Gbit/s transmission over 8200 km using pre-filtered
CS-RZ DPSK signal and EDFA Repeaters," Proc. ECOC'03 (2003).

J. M. C. Boggio, C. Lundström, J. Yang, H. Sunnerud, P. A. Andrekson, "Double-pumped FOPA with 40 dB flat gain over 81 nm
bandwidth," Proc. ECOC 2008 (2008).

G. Charlet, M. Salsi, H. Mardoyan, P. Tran, J. Renaudier, S. Bigo, M. Astruc, P. Sillard, L. Provost, F. Cérou, "Transmission of 81 channels at 40 Gbit/s over a
transpacific-distance erbium-only link, using PDM-BPSK modulation,
coherent detection, and a new large effective area fibre," Proc. ECOC'08 (2008).

K. Tajima, J. Zhou, K. Nakajima, K. Kurokawa, "Ultra low loss and long length photonic crystal fiber," Proc. OFC'04 (2004).

S. Ten, "Advanced fibers for submarine and long-haul
applications," Proc. LEOS 2004 pp. 543-544.

Z. Tong, Q. Yang, Y. Ma, W. Shieh, "21.4 Gb/s coherent optical OFDM transmission over 200
km multimode fiber," Proc. OECC/ACOFT 2008 (2008).

M. Bigot-Astruc, F. Gooijer, N. Montaigne, P. Sillard, "Trench-assisted profiles for large-effective-area
single-mode fibers," Proc. ECOC'08 (2008).

R. J. Essiambre, G. J. Foschini, P. J. Winzer, G. Kramer, "Exploring capacity limits of fibre-optic mommunication
systems," Proc. ECOC 2008 (2008).

D. McGhan, C. Laperle, A. Savehenko, L. Chuandong, G. Mak, M. O'Sullivan, "5120 km RZ-DPSK transmission over G652 fiber at 10
Gb/s with no optical dispersion compensation," Proc. OFC 2005 (2005).

I. Morita, K. Tanaka, N. Edagawa, M. Suzuki, "Impact of the dispersion map on long-haul 40 Gbith
single-channel soliton transmission with periodic dispersion
compensation," Proc. OFC'99 (1999).

B. Wu, E. Narimanov, "Information capacity of nonlinear fiber-optical
systems," Proc. 2005 Quantum Electron. Laser Sci. Conf. (QELS) (2005).

L. F. Mollenauer, A. Grant, X. Liu, X. Wei, C. Xie, I. Kang, C. Doerr, "Demonstration of 109$\,\times\,$10 G dense WDM over more than 18 000 km using novel,
periodic-group-delay complemented dispersion compensation and
dispersion managed solitons," Proc. ECOC 03 (2003).

S. L. Jansen, D. van den Borne, C. Climent, M. Serbay, C.-J. Weiske, H. Suche, P. M. Krummrich, S. Spalter, S. Calabro, N. Hecker-Denschlag, P. Leisching, W. Rosenkranz, W. Sohler, G. D. Khoe, T. Koonen, H. de Waardt, "10 200 km 22$\,\times\,$2$\,\times\,$l0 Gbit/s RZ-DQPSK dense WDM transmission without inline
dispersion compensation through optical phase conjugation," Proc. OFC'05 (2005).

L. Becouarn, G. Vareille, P. Pecci, J. F. Marcerou, "3 Tbit/s transmission (301 DPSK channels at 10.709
Gb/s) over 10270 km with a record efficiency of 0.65(bit/s)/Hz," Proc. ECOC 03 (2003).

R.-J. Essiambre, G. J. Foschini, P. J. Winzer, G. Kramer, E. C. Burrows, "The capacity of fiber-optic communication systems," Proc. OFC2008 (2008).

J. Zhao, A. D. Ellis, F. C. G. Gunning, P. Frascella, S. K. Ibrahim, R. Weerasuriya, "High-capacity transmission using coherent WDM
(invited)," OECC 2009 Hong Kong (2009).

M. Seimetz, L. Molle, D.-D. Gross, B. Auth, R. Freund, "Coherent RZ-8 PSK transmission at 30 Gbit/s over 1200
km employing homodyne detection with digital carrier phase
estimation," Proc. ECOC'07 (2007).

A. H. Gnauck, G. Charlet, P. Tran, P. Winzer, C. Doerr, J. Centanni, E. Burrows, T. Kawanishi, T. Sakamoto, K. Higuma, "25.6-Tb/s C+L-band transmission of
polarization-multiplexed RZ-DQPSK signals," Proc. OFC 2007 (2007).

B. J. C. Schmidt, Z. Zan, L. B. Du, A. J. Lowery, "100 Gbit/s transmission using single band direct
detection optical OFDM," Proc. OFC'09 (2009).

J. Zhao, A. D. Ellis, "Performance improvement using a novel MAP detector in
coherent WDM systems," Proc. ECOC'08 (2008).

T. Healy, F. C. G. Gunning, E. Pincemin, B. Cuenot, A. D. Ellis, "1 200 km SMF (100 km spans) 280 Gbit/s coherent WDM
transmission using hybrid Raman/EDFA amplification," ECOC'07 Berlin (2007) paper Mo1.3.5.

H. Sanjoh, E. Yamada, Y. Yoshikuni, "Optical orthogonal frequency division multiplexing
using frequency/time domain filtering for high spectral efficiency
up to 1 bit/s/Hz," Proc. OFC'02 (2002).

A. Sano, E. Yamada, H. Masuda, E. Yamazaki, T. Kobayashi, E. Yoshida, Y. Miyamoto, S. Matsuoka, R. Kudo, K. Ishihara, Y. Takatori, M. Mizoguchi, K. Okada, K. Hagimoto, H. Yamazaki, S. Kamei, H. Ishii, "13.4-Tb/s (134$\,\times\,$111-Gb/s/ch) no-guard-interval coherent OFDM transmission
over 3 600 km of SMF with 19-ps average PMD," Proc. ECOC'08 (2008).

K. Takiguchi, M. Oguma, T. Shibata, H. Takahashi, "Optical OFDM demultiplexer using silica PLC based
optical FFT circuit," Proc. OFC 2009 (2009).

A. D. Ellis, F. C. G. Gunning, "Filter strategies for coherent WDM," Proc. Emerging Technol. Opt. Sci. (2004).

A. D. Ellis, F. C. G. Gunning, B. Cuenot, T. C. Healy, E. Pincemin, M. Rukosueva, "Towards 1TbE using coherent WDM," Proc. OECC/ACOFT 2008 (2008).

F. C. G. Gunning, T. Healy, X. Yang, A. D. Ellis, "0.6 Tbit/s capacity and 2 bit/s/Hz spectral efficiency
at 42.6 Gsymbol/s using a single DFB laser with NRZ coherent WDM and
polarisation multiplexing," Proc. CLEO Eur. 2007 (2007).

Y. Ma, Q. Yang, Y. Tang, S. Chen, W. Shieh, "1 Tb/s per channel coherent optical OFDM transmission
with subwavelength bandwidth access," Proc. OFC'09 (2009).

S. L. Jansen, I. Morita, H. Tanaka, "10-Gb/s OFDM with conventional DFB lasers," Proc. ECOC'07 (2007).

W. Shieh, "High spectral efficiency coherent optical OFDM for 1
Tb/s ethernet transport," Proc. OFC 2009 (2009).

S. L. Jansen, I. Morita, N. Takeda, H. Tanaka, "20-Gb/s OFDM transmission over 4 160-km SSMF enabled
by RF-pilot tone phase noise compensation," Proc. OFC Conf. 2007 (2007).

H. Takahashi, A. Al Amin, S. L. Jansen, I. Morita, H. Tanaka, "DWDM transmission with 7.0 bit/s/Hz spectral
efficiency using 8$\,\times\,$65.1 Gbit/s coherent PDM OFDM signals," Proc. OFC 2009 (2009).

X. Yi, W. Shieh, Y. Ma, "Phase noise on coherent optical OFDM systems with
16-QAM and 64-QAM beyond 10 Gb/s," Proc. ECOC'07 (2007).

E. Desurvire, Erbium-Doped Fiber Amplifiers (Wiley, 2002).

S. Haykin, Digital Communications (Wiley, 1988).

J. G. Proakis, Digital Communications (McGraw-Hill, 2000).

M. Nakazawa, "Challenges to FDM-QAM coherent transmission with
ultrahigh spectral efficiency," Proc. ECOC 2008 (2008).

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