J.-X. Cai, Y. Cai, C. R. Davidson, D. G. Foursa, A.
Lucero, O. Sinkin, W. Patterson, A. Philipetskii, G. Mohs, N. S. Bergano,
"Transmission of 96$\,\times\,$100 G pre-filtered PDM-RZ-QPSK channels with 400%
spectral efficiency," Proc. OFC'10 (2010).

T. Ellermeyer, J. Müllrich, J. Rupeter, H.
Langenhagen, A. Bielikk, M. Moller, "DA and AD converters for 25 GS/s and above,"
Proc. IEEE LEOS Summer Topicals (2008).

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/NFOEC2007 (2007).

X. Liu, S. Chandrasekhar, P. J. Winzer, S. Draving, J.
Evangelista, N. Hoffman, B. Zhu, D. W. Peckham, "Single coherent detection of a
606-Gb/s COOFDM signal with 32-QAM subcarrier modulation using
4$\,\times\,$80-Gsamples/s ADCs," Proc. ECOC2010 (2010).

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," Proc. ECOC'08 (2008).

J. Yu, X. Zhou, Y. K. Huang, S. Gupta, M. F. Huang, T.
Wang, P. Magill, "112.8-Gb/s PM-RZ-64QAM optical signal generation and
transmission on a 12.5 GHz WDM grid," Proc. OFC'10 (2010).

D. Qian, M. Huang, E. Ip, Y. Huang, Y. Shao, J. Hu, T.
Wang, "101.7-Tb/s (370$\,\times\,$294-Gb/s) PDM-128QAM-OFDM transmission over
3$\,\times\,$55-km SSMF using pilot-based phase noise mitigation," Proc. OFC2011
(2011).

S. Bigo, Y. Frignac, G. Charlet, W. Idler, S. Borne,
H. Gross, R. Dischler, W. Poehlmann, P. Tran, C. Simonneau, D. Bayart, G. Veith,
A. Jourdan, J.-P. Hamaide, "10.2 Tb/s (256$\,\times\,$42.7 Gb/s PDM/WDM)
transmission over 100 km teralight fiber with 1.28 b/s/Hz spectral efficiency,"
Proc. OFC2001 (2001).

G. Charlet, M. Salsi, P. Tran, M. Bertolini, H.
Mardoyan, J. Renaudier, O. Bertran-Pardo, S. Bigo, "72$\,\times\,$100 Gb/s
transmission over transoceanic distance, using large effective area fiber, hybrid
Raman-Erbium amplification and coherent detection," Proc. OFC/NFOEC2009
(2009).

J. Yu, X. Zhou, M. F. Huang, Y. Shao, D. Qian, T.
Wang, M. Cvijetic, P. Magill, L. Nelson, M. Birk, S. Ten, H. B. Matthew, S. K.
Mishra, "17 Tb/s (161$\,\times\,$114 Gb/s) PolMux-RZ-8PSK transmission over 662 km
of ultra-low loss fiber using C-band EDFA amplification and digital coherent
detection," Proc. ECOC'08 (2008).

H. Masuda, E. Yamazaki, A. Sano, T. Yoshimatsu, T.
Kobayashi, E. Yoshida, Y. Miyamoto, S. Matsuoka, Y. Takatori, M. Mizoguchi, K.
Okada, K. Hagimoto, T. Yamada, S. Kamei, "13.5-Tb/s (135$\,\times\,$111-Gb/s/ch)
no-guard-interval coherent OFDM transmission over 6 248 km using SNR maximized
second-order DRA in the extended L-band," Proc. OFC/NFOEC2009
(2009).

M. Salsi, H. Mardoyan, P. Tran, C. Koebele, E.
Dutisseuil, G. Charlet, S. Bigo, "155$\,\times\,$100 Gb/s coherent PDM-QPSK
transmission over 7 200 km," Proc. ECOC (2009).

J.-X. Cai, Y. Cai, C. R. Davidson, A. Lucero, H.
Zhang, D. G. Foursa, O. Sinkin, W. Patterson, A. Philipetskii, G. Mohs, N. S.
Bergano, "20 Tb/s capacity transmission over 6 860 km," Proc. OFC'11
(2011).

X. Zhou, J. Yu, M.-F. Huang, Y. Shao, T. Wang, L.
Nelson, P. Magill, M. Birk, P. I. Borel, D. W. Peckham, R. Lingle, Jr."64-Tb/s
(640$\,\times\,$107-Gb/s) PDM-36 QAM transmission over 320 km using both pre- and
post-transmission digital equalization," Proc. OFC/NFOEC2010
(2010).

A. Sano, T. Kobayashi, A. Matsuura, S. Yamamoto, S.
Yamanaka, E. Yoshida, Y. Miyamoto, M. Matsui, M. Mizoguchi, T. Mizuno,
"100$\,\times\,$120-Gb/s PDM 64-QAM transmission over 160 km using
linewidth-tolerant pilotless digital coherent detection," Proc. ECOC'10
(2010).

T. Kobayashi, A. Sano, A. Matsuura, M. Yoshida, T.
Sakano, H. Kubota, Y. Miyamoto, K. Ishihara, M. Mizoguchi, M. Nagatani, "45.2 Tb/s
C-band WDM transmission over 240 km using 538 Gb/s PDM-64QAM single carrier FDM
signal with digital pilot tone," Proc. ECOC2011 (2011).

K. Fukuchi, T. Kasamatsu, M. Morie, R. Ohhira, T. Ito,
K. Sekiya, D. Ogasawara, T. Ono, "10.92-Tb/s (273$\,\times\,$40-Gb/s)
triple-band/ultra-dense WDM optical-repeatered transmission experiment," Proc.
OFC2001 (2001).

H. Masuda, A. Sano, T. Kobayashi, E. Yoshida, Y.
Miyamoto, Y. Hibino, K. Hagimoto, T. Yamada, T. Furuta, H. Fukuyama, "20.4-Tb/s
(204$\,\times\,$111 Gb/s) transmission over 240 km using bandwidth-maximized
hybrid Raman/EDFAs," Proc. OFC/NFOEC2007 (2007).

A. H. Gnauck, G. Charlet, P. Tran, P. J. Winzer, C. R.
Doerr, J. C. Centanni, E. C. Burrows, T. Kawanishi, T. Sakamoto, K. Higuma,
"25.6-Tb/s ${\rm C}+{\rm L}$ band transmission of polarization-multiplexed
RZ-DQPSK signals," Proc. OFC/NFOEC2007 (2007).

Y. Cai, "Coherent detection in long-haul transmission
systems," Proc. OFC/NFOEC2008 (2008).

X. Zhou, J. Yu, D. Qian, T. Wang, G. Zhang, P. D.
Magill, "8$\,\times\,$114 Gb/s, 25-GHz-spaced, PolMux-RZ-8PSK transmission over
640 km of SSMF employing digital coherent detection and EDFA-only amplification,"
Proc. OFC2008 (2008).

X. Zhou, J. Yu, M.-F. Huang, Y. Shao, T. Wang, P.
Magill, M. Cvijetic, L. Nelson, M. Birk, G. Zhang, S. Ten, H. B. Matthew, S. K.
Mishra, "32 Tb/s (320$\,\times\,$114 Gb/s) PDM-RZ-8QAM transmission over 580 km of
SMF-28 ultra-low-loss fiber," Proc. OFC/NFOEC2009 (2009).

A. Sano, H. Masuda, T. Kobayashi, M. Fujiwara, K.
Horikoshi, E. Yoshida, Y. Miyamoto, M. Matsui, M. Mizoguchi, H. Yamazaki, Y.
Sakamaki, H. Ishii, "69.1-Tb/s (432$\,\times\,$171-Gb/s) C- and extended L-band
transmission over 240 km using PDM-16-QAM modulation and digital coherent
detection," Proc. OFC/NFOEC2010 (2010).