N. Alic, M. Sköld, P. A. Andrekson, M. Karlsson, S. Radic, "Benefits of joint statistics in MLSD-equalized
transmission," IEEE Photon. Technol. Lett. 21, 495-497 (2009).

M. Sköld, M. Westlund, H. Sunnerud, P. A. Andrekson, "All-optical waveform sampling in high-speed optical
communication systems using advanced modulation formats," J. Lightw. Techol. 27, 3662-3671 (2009).

P. Poggiolini, G. Bosco, Y. Benlachtar, S. J. Savory, P. Bayvel, R. Killey, J. Prat, "Long-haul 10 Gbit/s linear and non-linear IMDD
transmission over uncompensated standard fiber using a SQRT-metric
MLSE receiver," Opt. Exp. 16, 12919-12936 (2008).

G. Bosco, P. Poggiolini, M. Visintin, "Performance analysis of MLSE receivers based on the
square-root metric," J. Lightw. Technol. 26, 2098-2109 (2008).

J. M. Gene, P. J. Winzer, S. Chandrasekhar, H. Kogelnik, "Simultaneous compensation of polarization mode
dispersion and chromatic dispersion using electronic signal
processing," J. Lightw. Techol. 25, 1735-1741 (2007).

G. Bosco, V. Curri, E. Roffe, P. Poggiolini, "Joint effect of MLSE and receiver filters optimization
on dispersion robustness of IMDD, DPSK, DQPSK, and duobinary
modulation," IEEE Photon. Technol. Lett. 19, 2003-2005 (2007).

S. Chandrasekhar, A. H. Gnauck, "Performance of MLSE receiver in a dispersion-managed
multispan experiment at 10.7 Gb/s under nonlinear transmission," IEEE Photon. Technol. Lett. 18, 2448-2450 (2006).

P. Winzer, R. Essiambre, "Advanced optical modulation formats," Proc. IEEE 94, 954-985 (2006).

N. Alic, G. C. Papen, R. Saperstein, L. B. Milstein, Y. Fainman, "Signal statistics and maximum likelihood sequence
estimation in intensity modulated fiber optic links containing a
single optical preamplifier," Opt. Exp. 13, 4568-4579 (2005).

O. Agazzi, M. Hueda, H. Carrer, D. Crivelli, "Maximum-likelihood sequence estimation in dispersive
optical channels," J. Lightw. Technol. 23, 749-762 (2005).

C. Dorrer, C. R. Doerr, I. Kang, R. Ryf, J. Leuthold, P. Winzer, "Measurement of eye diagrams and constellation diagrams
of optical sources using linear optics and waveguide technology," J. Lightw. Technol. 23, 178-186 (2005).

S. M. Berber, "An automated method for BER characteristics
measurement," IEEE Trans. Instrum. Meas. 53, 575-580 (2004).

H. F. Haunstein, W. Sauer-Greff, A. Dittrich, K. Sticht, R. Urbansky, "Principles for electronic equalization of
polarization-mode dispersion," J. Lightw. Technol. 22, 1169-1182 (2004).

I. B. Djordjevic, B. Vasic, "Receiver modeling for optically amplified
communication systems," Int. J. Electron. Commun. 57, 381-390 (2003).

I. T. Monroy, G. Einarsson, "On analytical expressions for the distribution of the
filtered output of square envelope receivers with signal and colored
Gaussian noise input," IEEE Trans. Commun. 49, 19-23 (2001).

G. Bosco, A. Carena, V. Curri, R. Gaudino, P. Poggiolini, S. Benedetto, "A novel analytical method for the BER evaluation in
optical systems affected by parametric gain," IEEE Photon. Technol. Lett. 12, 152-154 (2000).

E. Forestieri, "Evaluating the error probability in lightwave systems
with chromatic dispersion, arbitrary pulse shape and pre- and
postdetection filtering," J. Lightw. Technol. 18, 1493-1503 (2000).

G. Jacobsen, K. Berlitzon, Z. Xiapin, "WDM transmission system performance: Influence of
non-Gaussian detected ASE noise and periodic DEMUX characteristic," J. Lightw. Technol. 16, 1804-1812 (1998).

J. Lee, C.-S. Shim, "Bit-error-rate analysis of optically preamplified
receivers using an eigenfunction expansion method in optical
frequency domain," J. Lightw. Technol. 12, 1224-1229 (1994).

P. Humblet, M. Azizoglu, "On the bit error rate of lightwave systems with
optical amplifiers," J. Lightw. Technol. 9, 1576-1582 (1991).

D. Marcuse, "Derivations of the analytical expressions for
bit-error probability in lightwave systems with optical amplifiers," J. Lightw. Technol. 8, 1816-1823 (1990).

R. Loudon, T. J. Shepherd, "Properties of the optical quantum amplifier," Opt. Acta 31, 1243-1269 (1984).

D. Slepian, "On bandwidth," Proc. IEEE 64, 292-300 (1976).

G. D. Forney, "The Viterbi algorithm," Proc. IEEE 61, 268-278 (1973).

G. D. Forney, "Maximum-likelihood sequence estimation of digital
sequences in presence of intersymbol interference," IEEE Trans. Inf. Theory IT-18, 363-378 (1972).

D. Slepian, "Fluctuations of random noise power," Bell Syst. Tech. J. 37, 163-184 (1958).

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

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

D. Slepian, "Fluctuations of random noise power," Bell Syst. Tech. J. 37, 163-184 (1958).

G. Bosco, A. Carena, V. Curri, R. Gaudino, P. Poggiolini, S. Benedetto, "A novel analytical method for the BER evaluation in
optical systems affected by parametric gain," IEEE Photon. Technol. Lett. 12, 152-154 (2000).

S. Chandrasekhar, A. H. Gnauck, "Performance of MLSE receiver in a dispersion-managed
multispan experiment at 10.7 Gb/s under nonlinear transmission," IEEE Photon. Technol. Lett. 18, 2448-2450 (2006).

G. Bosco, V. Curri, E. Roffe, P. Poggiolini, "Joint effect of MLSE and receiver filters optimization
on dispersion robustness of IMDD, DPSK, DQPSK, and duobinary
modulation," IEEE Photon. Technol. Lett. 19, 2003-2005 (2007).

N. Alic, M. Sköld, P. A. Andrekson, M. Karlsson, S. Radic, "Benefits of joint statistics in MLSD-equalized
transmission," IEEE Photon. Technol. Lett. 21, 495-497 (2009).

I. T. Monroy, G. Einarsson, "On analytical expressions for the distribution of the
filtered output of square envelope receivers with signal and colored
Gaussian noise input," IEEE Trans. Commun. 49, 19-23 (2001).

G. D. Forney, "Maximum-likelihood sequence estimation of digital
sequences in presence of intersymbol interference," IEEE Trans. Inf. Theory IT-18, 363-378 (1972).

S. M. Berber, "An automated method for BER characteristics
measurement," IEEE Trans. Instrum. Meas. 53, 575-580 (2004).

I. B. Djordjevic, B. Vasic, "Receiver modeling for optically amplified
communication systems," Int. J. Electron. Commun. 57, 381-390 (2003).

E. Forestieri, "Evaluating the error probability in lightwave systems
with chromatic dispersion, arbitrary pulse shape and pre- and
postdetection filtering," J. Lightw. Technol. 18, 1493-1503 (2000).

H. F. Haunstein, W. Sauer-Greff, A. Dittrich, K. Sticht, R. Urbansky, "Principles for electronic equalization of
polarization-mode dispersion," J. Lightw. Technol. 22, 1169-1182 (2004).

O. Agazzi, M. Hueda, H. Carrer, D. Crivelli, "Maximum-likelihood sequence estimation in dispersive
optical channels," J. Lightw. Technol. 23, 749-762 (2005).

D. Marcuse, "Derivations of the analytical expressions for
bit-error probability in lightwave systems with optical amplifiers," J. Lightw. Technol. 8, 1816-1823 (1990).

P. Humblet, M. Azizoglu, "On the bit error rate of lightwave systems with
optical amplifiers," J. Lightw. Technol. 9, 1576-1582 (1991).

G. Jacobsen, K. Berlitzon, Z. Xiapin, "WDM transmission system performance: Influence of
non-Gaussian detected ASE noise and periodic DEMUX characteristic," J. Lightw. Technol. 16, 1804-1812 (1998).

J. Lee, C.-S. Shim, "Bit-error-rate analysis of optically preamplified
receivers using an eigenfunction expansion method in optical
frequency domain," J. Lightw. Technol. 12, 1224-1229 (1994).

C. Dorrer, C. R. Doerr, I. Kang, R. Ryf, J. Leuthold, P. Winzer, "Measurement of eye diagrams and constellation diagrams
of optical sources using linear optics and waveguide technology," J. Lightw. Technol. 23, 178-186 (2005).

G. Bosco, P. Poggiolini, M. Visintin, "Performance analysis of MLSE receivers based on the
square-root metric," J. Lightw. Technol. 26, 2098-2109 (2008).

M. Sköld, M. Westlund, H. Sunnerud, P. A. Andrekson, "All-optical waveform sampling in high-speed optical
communication systems using advanced modulation formats," J. Lightw. Techol. 27, 3662-3671 (2009).

J. M. Gene, P. J. Winzer, S. Chandrasekhar, H. Kogelnik, "Simultaneous compensation of polarization mode
dispersion and chromatic dispersion using electronic signal
processing," J. Lightw. Techol. 25, 1735-1741 (2007).

R. Loudon, T. J. Shepherd, "Properties of the optical quantum amplifier," Opt. Acta 31, 1243-1269 (1984).

P. Poggiolini, G. Bosco, Y. Benlachtar, S. J. Savory, P. Bayvel, R. Killey, J. Prat, "Long-haul 10 Gbit/s linear and non-linear IMDD
transmission over uncompensated standard fiber using a SQRT-metric
MLSE receiver," Opt. Exp. 16, 12919-12936 (2008).

N. Alic, G. C. Papen, R. Saperstein, L. B. Milstein, Y. Fainman, "Signal statistics and maximum likelihood sequence
estimation in intensity modulated fiber optic links containing a
single optical preamplifier," Opt. Exp. 13, 4568-4579 (2005).

P. Winzer, R. Essiambre, "Advanced optical modulation formats," Proc. IEEE 94, 954-985 (2006).

G. D. Forney, "The Viterbi algorithm," Proc. IEEE 61, 268-278 (1973).

D. Slepian, "On bandwidth," Proc. IEEE 64, 292-300 (1976).

A. Kavcic, J. Moura, "Correlation-sensitive adaptive sequence detection," Proc. IEEE Int. Conf. Commun. (IEEE-ICC 1998) pp. 657-661.

S. M. Kay, Fundamentals of Statistical Signal Processing (Prentice-Hall, 1993).

J. Prat, A. Napoli, J. M. Gene, M. Omella, P. Poggiolini, V. Curri, "Square root strategy: A novel method to linearize an
optical communication system with electronic equalizers," Proc. ECOC (2005) pp. 713-714.

J. G. Proakis, Digital Communications (McGraw-Hill, 1995).

International Telecommunication Union Telecommunication
Standardization Sector (ITU-T), Series G: Transmission Systems and
Media, Digital Systems and Networks, G975.1 (2004).

H. F. Haunstein, R. Schlenk, K. Sticht, A. Dittrich, W. Sauer-Greff, R. Urbansky, "Optimized filtering for electronic equalizers in the
presence of chromatic dispersion and PMD," Proc. OFC 2004 .

P. Winzer, private communication (2005).

T. Kupfer, J. Whiteaway, S. Langenbach, "PMD compensation using electronic equalization
particular maximum likelihood sequence estimation," OFC 2007 AnaheimCA (2007) Paper OMH1.

P. Poggiolini, G. Bosco, J. Prat, R. Killey, S. Savory, "MLSE-EDC versus optical dispersion compensation in a
single-channel SPM-limited 800 km link at 10 Gbit/s," Eur. Conf. Opt. Commun. (ECOC 2007) pp. 913.

D. Fritsche, L. Schürer, A. Ehrhardt, D. Breuer, H. Oeruen, C. Schäffer, "Field trial investigation of 16-states MLSE equalizer
for simultaneous compensation of CD, PMD and SPM," Opt. Fiber Commun. Conf. (OFC/NFOEC 2009) San DiegoCA (2009) Paper OWE4.

S. Benedetto, E. Biglieri, Principles of Digital Transmission (Kluwer/Plenum, 1999).

J.-P. Elbers, H. Wernz, H. Griesser, C. Glingener, A. Faerbert, S. Langenbach, N. Stojanovic, C. Dorschky, T. Kupfer, C. Schulien, "Measurement of the dispersion tolerance of optical
duobinary with an MLSE-receiver at 10.7 Gb/s," Proc. OFC 20O5 (2005) pp. 3.

G. Gavioli, G. Bosco, P. Poggiolini, M. Visintin, P. Bayvel, I. Cano, E. Torrengo, M. Belmonte, G. Osnago, S. Piciaccia, A. La Porta, C. Lezzi, M. Ibsen, P. Petropoulos, "Record-length 10.7 Gb/s uncompensated transmission
experiment over installed fiber using narrow-filtered duobinary and
a correlation-sensitive MLSE-Rx," Proc. Opt. Fiber Commun. Conf. (OFC/NFOEC 2009) pp. 3.

M. Rubsamen, P. J. Winzer, R.-J. Essiambre, "MLSE receivers for narrowband optical filtering," Opt. Fiber Commun. Conf. (OFC/NFOEC 2006) AnaheimCA Paper OWB6.

C. Xia, W. Rosenkranz, "Electrical dispersion compensation for different
modulation formats with optical filtering," Proc. Opt. Fiber Commun. Conf. (OFC 2005) pp. 3.

F. Buchali, H. Buelow, "Correlation sensitive viterbi equalization of 10 Gb/s
signals in bandwidth limited receivers," Proc. Opt. Fiber Commun. Conf. (OFC 2005) pp. 3.

R. N. McDonough, A. D. Whalen, Detection of Signals in Noise (Academic, 1995).

G. P. Agrawal, Nonlinear Fiber Optics (Academic, 2007).

G. Einarsson, Principles of Lightwave Communications (Wiley, 1996).

P. J. Winzer, "Performance estimation of receivers corrupted by
optical noise," TOPS OAA Conf. (2001).

A. Faerbert, S. Langenbach, N. Stojanovic, C. Dorschky, T. Kupfer, C. Schulien, J.-P. Elbers, H. Wernz, H. Griesser, C. Glingener, "Performance of a 10.7 Gb/s receiver with digital
equaliser using maximum likelihood sequence estimation," Proc. Eur. Conf. Opt. Commun. (ECOC 2004) .

C. R. S. Fludger, J. E. A. Whiteaway, P. J. Anslow, Proc. OFC 2004 .

N. Alic, G. C. Papen, R. E. Saperstein, R. Jiang, C. Marki, Y. Fainman, P. A. Andrekson, S. Radic, "Experimental demonstration of 10 Gb/s NRZ extended
dispersion-limited reach over 600 km-SMF link without optical
dispersion compensation," Opt. Fiber Commun. Conf. (OFC/NFOEC 2006) AnaheimCA Paper OWB7.

S. J. Savory, Y. Benlachtar, R. I. Killey, P. Bayvel, G. Bosco, P. Poggiolini, J. Prat, M. Omella, "IMDD transmission over 1 040 km of standard single-
mode fiber at 10 Gbit/s using a one-sample-per-bit reduced-
complexity MLSE receiver," Proc. Opt. Fiber Commun. Conf. (OFC 2007) pp. 1-3.