Abstract

We transmit 143x32.6 GBd 8D-QPSK signal over 15,050 km with EDFAs consuming 29 mW of 980 nm-pump power. We experimentally achieve record optical power efficiency from 6.5 to 1.24 Tb/s/W with the corresponding optimum spectral efficiency from 2.4 to 2.0 b/s/Hz for transmission distances ranging from 6,020 to 15,050 km respectively. These results are enabled by: precisely tuned information spectral efficiency and EDFA output power based on our power efficiency model to maximize optical power efficiency; the use of coded modulation format with <1.6 dB gap to Shannon limit and variable overhead FEC; the use of ultra-low loss fiber; more power efficient gain equalization with a single gain flattening filter per two EDFAs; and low back-to-back implementation penalty. We also confirmed the validity of our power efficiency model comparing the designed and measured OSNR evolution, achieved optical power efficiency and the corresponding spectral efficiency.

25 Tb/s transmission over 5,530 km using 16QAM at 5.2 b/s/Hz spectral efficiency

J.-X. Cai, H. G. Batshon, H. Zhang, C. R. Davidson, Y. Sun, M. Mazurczyk, D. G. Foursa, O. Sinkin, A. Pilipetskii, G. Mohs, and Neal S. Bergano
Opt. Express 21(2) 1555-1560 (2013)

1306-km 20x124.8-Gb/s PM-64QAM Transmission over PSCF with Net SEDP 11,300 (b∙km)/s/Hz using 1.15 samp/symb DAC

A. Nespola, S. Straullu, G. Bosco, A. Carena, J. Yanchao, P. Poggiolini, F. Forghieri, Y. Yamamoto, M. Hirano, T. Sasaki, J. Bauwelinck, and K. Verheyen
Opt. Express 22(2) 1796-1805 (2014)

30.4 Tb/s transmission over transpacific distance using 200 Gb/s and dual wavelength 400 Gb/s 16QAM at 6.0 b/s/Hz spectral efficiency

J.-X. Cai, H. G. Batshon, H. Zhang, M. Mazurczyk, O. Sinkin, D. G. Foursa, A. Pilipetskii, G. Mohs, and Neal S. Bergano
Opt. Express 22(8) 9116-9122 (2014)

Transmission of 1.936 Tb/s (11 × 176 Gb/s) DP-16QAM superchannel signals over 640 km SSMF with EDFA only and 300 GHz WSS channel

Jianqiang Li, Magnus Karlsson, Peter A. Andrekson, and Kun Xu
Opt. Express 20(26) B223-B231 (2012)

Coherent Nyquist optical pulse transmission at nearly 1-Tb/s/λ over 1,600 km with a capacity of 21.5 Tb/s using PS-32 QAM signals

Shohei Beppu, Aoto Ishikawa, Takeki Serikawa, Masato Yoshida, Toshihiko Hirooka, and Masataka Nakazawa
Opt. Express 32(9) 16533-16547 (2024)