X. Yi, W. Shieh, Y. Ma, "Phase noise effects on high spectral efficiency coherent optical OFDM
transmission," J. Lightw. Technol. 26, 1309-1316 (2008).

S. L. Jansen, I. Morita, T. C. W. Schenk, N. Takeda, H. Tanaka, "Coherent optical 25.8-Gb/s OFDM transmission over 4160-km SSMF," J. Lightw. Technol. 26, 6-15 (2008).

M. Brodsky, "Polarization mode dispersion of installed fibers," J. Lightw. Technol. 24, 4584-4599 (2006).

A. J. Lowery, L. Du, J. Armstrong, "Orthogonal frequency division multiplexing for adaptive dispersion
compensation in long haul WDM systems," Proc. Opt. Fiber Commun. Conf. 2006 pp. 1-3.

H. Takahashi, A. Al Amin, S. L. Jansen, I. Morita, H. Tanaka, "DWDM transmission with 7.0-bit/(s$\cdot$Hz) spectral efficiency using 8$\,\times\,$65.1-Gbit/s coherent PDM-OFDM signals," Opt. Fiber Commun. Conf. San DiegoCA (2009) Paper PDPB7.

J. G. Proakis, Digital Communications (McGraw-Hill, 2000) pp. 201-206.

M. Boroditsky, M. Brodsky, N. J. Frigo, P. Magill, H. Rosenfeldt, "Polarization dynamics in installed fiberoptic systems," Proc. LEOS (2005) pp. 414-415.

M. Nakazawa, "Challenges to FDM-QAM coherent transmission with ultrahigh spectral
efficiency," Eur. Conf. Opt. Commun. BrusselsBelgium (2008) Paper Tu.1.E.1.

A. H. Gnauck, P. J. Winzer, C. R. Doerr, L. L. Buhl, "10$\,\times\,$112—Gb/s PDM 16–QAM transmission over 630 km of fiber with
6.2-b/s/Hz spectral efficiency," Opt. Fiber Commun. Conf. San DiegoCA (2009) Paper PDPB8.

H. Takahashi, A. A. Amin, S. L. Jansen, I. Morita, H. Tanaka, "8$\,\times\,$66.8-Gbit/s coherent PDM-OFDM transmission over 640 km of SSMF at 5.6-bit/s/Hz
spectral efficiency," Eur. Conf. Opt. Commun. BrusselsBelgium (2008) Post-deadline Paper Th.3.E.4.

B. J. Schmidt, A. J. Lowery, J. Armstrong, "Experimental demonstrations of 20 Gbit/s direct-detection optical OFDM and
12 Gbit/s with a colorless transmitter," OFC 2007 AnaheimCA (2007) Post-deadline paper PDP18.

S. L. Jansen, I. Morita, H. Tanaka, "10$\,\times\,$121.9-Gb/s PDM-OFDM transmission with 2-b/s/Hz spectral efficiency over 1 000 km
of SSMF," Opt. Fiber Commun. Conf. San DiegoCA (2008) Paper PDP 2.

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," Eur. Conf. Opt. Commun. BrusselsBelgium (2008) Post-deadline paper Th.3.E.1.

Q. Yang, Y. Ma, W. Shieh, "107 Gb/s coherent optical OFDM reception using orthogonal band multiplexing," Opt. Fiber Commun. Conf. San DiegoCA (2008) Paper PDP 7.