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H. Sun, K.-T. Wu, K. Roberts, "Real-time measurements of a 40 Gb/s coherent
system," Opt. Exp. 16, 873-879 (2008).

J. Renaudier, G. Charlet, M. Salsi, O. B. Pardo, H. Mardoyan, P. Tran, S. Bigo, "Linear fiber impairments mitigation of 40-Gbit/s polarization-multiplexed
QPSK by digital processing in a coherent receiver," J.
Lightw. Technol. 26, 36-42 (2008).

O. Bertran-Pardo, J. Renaudier, G. Charlet, H. Mardoyan, P. Tran, S. Bigo, "Nonlinearity limitations when mixing 40-Gb/s coherent PDM-QPSK
channels with preexisting 10-Gb/s NRZ channels," IEEE
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A. Bononi, P. Serena, M. Bertolini, "Unified analysis of weakly-nonlinear
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A. Bononi, P. Serena, A. Orlandini, "A unified design framework
for single-channel dispersion-managed terrestrial systems," J. Lightw. Technol. 26, 3617-3631 (2008).

E. Ip, J. Kahn, "Feedforward carrier recovery for coherent
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R. Luis, B. Clouet, A. Teixeira, P. Monteiro, "Pump-probe analysis of the
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K.-P. Ho, "The effect of interferometer
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R. Killey, H. Thiele, V. Mikhailov, P. Bayvel, "Prediction of transmission
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A. Cartaxo, "Cross-phase modulation in intensity
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A. Cartaxo, "Impact of modulation frequency
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G. Bellotti, M. Varani, C. Francia, A. Bononi, "Intensity distortion induced
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A. Bononi, C. Francia, G. Bellotti, "Impulse response of cross-phase
modulation filters in multi-span transmission systems with dispersion compensation," Opt. Fiber Technol. 4, 371-383 (1998).

T.-K. Chiang, N. Kagi, M. Marhic, L. Kazovsky, "Cross-phase modulation in fiber links with
multiple optical amplifiers and dispersion compensators," J. Lightw. Technol. 14, 249-260 (1996).

J. Wang, K. Petermann, "Small signal analysis for dispersive
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J. Gordon, L. Mollenauer, "Phase noise in photonic communications
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N. Blachman, "The effect of phase error on
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E. Bedrosian, S. Rice, "Distortion and crosstalk of linearly filtered,
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A. Bononi, P. Serena, M. Bertolini, "Unified analysis of weakly-nonlinear
dispersion-managed optical transmission systems from perturbative approach," C. R. Physique 9, 947-962 (2008).

G. Nicholson, "Probability of error for optical
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O. Bertran-Pardo, J. Renaudier, G. Charlet, H. Mardoyan, P. Tran, S. Bigo, "Nonlinearity limitations when mixing 40-Gb/s coherent PDM-QPSK
channels with preexisting 10-Gb/s NRZ channels," IEEE
Photon. Technol. Lett. 20, 1314-1316 (2008).

R. Pawula, S. Rice, J. Roberts, "Distribution of the phase angle between
two vectors perturbed by Gaussian noise," IEEE
Trans. Commun. 30, 1828-1841 (1982).

K.-P. Ho, "Error probability of DPSK signals
with cross-phase modulation induced nonlinear phase noise," IEEE J. Sel. Topics Quantum Electron. 10, 421-427 (2004).

G. Bellotti, M. Varani, C. Francia, A. Bononi, "Intensity distortion induced
by cross-phase modulation and chromatic dispersion in optical-fiber transmissions
with dispersion compensation," IEEE Photon.
Technol. Lett. 10, 1745-1747 (1998).

R. Hui, Y. Wang, K. Demarest, C. Allen, "Frequency response of cross-phase modulation in multispan
WDM optical fiber systems," IEEE Photon. Technol.
Lett. 10, 1271-1273 (1998).

A. Cartaxo, "Impact of modulation frequency
on cross-phase modulation effect in intensity modulation-direct detection
WDM systems," IEEE Photon. Technol. Lett. 10, 1268-1270 (1998).

R. Killey, H. Thiele, V. Mikhailov, P. Bayvel, "Prediction of transmission
penalties due to cross-phase modulation in WDM systems using a simplified
technique," IEEE Photon. Technol. Lett. 12, 804-806 (2000).

K.-P. Ho, "The effect of interferometer
phase error on direct-detection DPSK and DQPSK signals," IEEE Photon. Technol. Lett. 16, 308-310 (2004).

S. Chandrasekhar, X. Liu, "Impact of channel plan and dispersion map
on hybrid DWDM transmission of 42.7-Gb/s DQPSK and 10.7-Gb/s OOK on 50-GHz
grid," IEEE Photon. Technol. Lett. 19, 1801-1803 (2007).

N. Blachman, "The effect of phase error on
DPSK error probability," IEEE Trans. Commun. 29, 364-365 (1981).

A. J. Viterbi, A. M. Viterbi, "Nonlinear estimation of PSK-modulated
carrier phase with application to burst digital transmission," IEEE Trans. Inf. Theory 29, 543-551 (1983).

J. Renaudier, G. Charlet, M. Salsi, O. B. Pardo, H. Mardoyan, P. Tran, S. Bigo, "Linear fiber impairments mitigation of 40-Gbit/s polarization-multiplexed
QPSK by digital processing in a coherent receiver," J.
Lightw. Technol. 26, 36-42 (2008).

J. Wang, K. Petermann, "Small signal analysis for dispersive
optical fiber communication systems," J. Lightw.
Technol. 10, 96-100 (1992).

A. Cartaxo, "Cross-phase modulation in intensity
modulation-direct detection WDM systems with multiple optical amplifiers and
dispersion compensators," J. Lightw. Technol. 17, 178-190 (1999).

P. Serena, A. Orlandini, A. Bononi, "Parametric-gain approach to
the analysis of single-channel DPSK/DQPSK systems with nonlinear phase noise," J. Lightw. Technol. 24, 2026-2037 (2006).

A. Gnauck, G. Charlet, P. Tran, P. Winzer, C. Doerr, J. Centanni, E. Burrows, T. Kawanishi, T. Sakamoto, K. Higuma, "25.6-Tb/s WDM transmission of polarization-multiplexed RZ-DQPSK
signals," J. Lightw. Technol. 26, 79-84 (2008).

E. Ip, J. Kahn, "Feedforward carrier recovery for coherent
optical communications," J. Lightw. Technol. 25, 2675-2692 (2007).

D.-S. Ly-Gagnon, S. Tsukamoto, K. Katoh, K. Kikuchi, "Coherent detection of optical quadrature
phase-shift keying signals with carrier phase estimation," J. Lightw. Technol. 24, 12-21 (2006).

R. Luis, A. Cartaxo, "Analytical characterization
of SPM impact on XPM-induced degradation in dispersion-compensated WDM systems," J. Lightw. Technol. 23, 1503-1513 (2005).

A. Bononi, P. Serena, A. Orlandini, "A unified design framework
for single-channel dispersion-managed terrestrial systems," J. Lightw. Technol. 26, 3617-3631 (2008).

T.-K. Chiang, N. Kagi, M. Marhic, L. Kazovsky, "Cross-phase modulation in fiber links with
multiple optical amplifiers and dispersion compensators," J. Lightw. Technol. 14, 249-260 (1996).

H. Sun, K.-T. Wu, K. Roberts, "Real-time measurements of a 40 Gb/s coherent
system," Opt. Exp. 16, 873-879 (2008).

A. Bononi, C. Francia, G. Bellotti, "Impulse response of cross-phase
modulation filters in multi-span transmission systems with dispersion compensation," Opt. Fiber Technol. 4, 371-383 (1998).

J. Gordon, L. Mollenauer, "Phase noise in photonic communications
systems using linear amplifiers," Opt. Lett 15, 1351-1353 (1990).

E. Bedrosian, S. Rice, "Distortion and crosstalk of linearly filtered,
angle modulated signals," Proc. IEEE 56, 2-13 (1968).

Y. Frignac, J.-C. Antona, S. Bigo, "Enhanced analytical engineering rule for
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R. Luis, B. Clouet, A. Teixeira, P. Monteiro, "Analytical modeling of the
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K.-P. Ho, Phase-Modulated Optical Communication
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C. Fürst, "43 Gb/s RZ-DQPSK DWDM
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100 GHz channel spacing," Proc. ECOC 2006 (2006) PDP Th4.1.4.

H. Griesser, "43 Gb/s RZ-DQPSK transmission
over a 660 km 10.7 Gb/s DWDM link," Proc. ECOC
2006 (2006) paper Th1.6.6.

S. Bigo, G. Charlet, O. Bertrand Pardo, J. Renaudier, "Characterization of the impact
of non-linear effects in coherent transmission experiments," Digest of the IEEE/LEOS Summer Topical Meetings 2008 (2008) pp. 125-126.

H. Griesser, J. Elbers, "Influence of cross-phase modulation
induced nonlinear phase noise on DQPSK signals from neighbouring OOK channels," Proc. ECOC 2005 (2005) paper Tu1. 2.2.