Abstract

We demonstrated high spectral efficiency real-time 500-Gb/s/carrier transmission over a 1200 km length with terrestrial field-installed cut-off shifted fiber (CSF) of ITU-T G.654.E compliant. For that demonstration, we used our real-time transponder and a combination of three amplification schemes (erbium-doped fiber amplifier (EDFA), and forward and backward distributed Raman amplifiers (DRAs)) that met safety requirements for lasers as defined by safety standard IEC 60825-2. By using forward DRA, optical signal-to-noise ratio (OSNR) improved by more than 1.3 dB. 66-GBaud polarization division multiplexing (PDM) 32 quadrature amplitude modulation (QAM) signals were generated by a real-time transponder using a 16-nm digital signal processing application-specific integrated circuit (DSP-ASIC) with device imperfection compensation technologies. We compared the 500-Gb/s/carrier transmission characteristics in a wavelength-division multiplexing (WDM) condition yielded by CSF, standard single-mode fiber (SMF), and dispersion-shifted fiber (DSF) installed in the field. The results show that the best transmission characteristics are attained by CSF transmission with forward DRA. The 1234-km transmission achieved with high spectral efficiency of 5.71 b/s/Hz, is, as far as we know, the longest yet achieved in 500-Gb/s/carrier transmission field experiments.

Real-time 400 Gbps/carrier WDM transmission over 2,000 km of field-installed G.654.E fiber

Hideki Maeda, Kohei Saito, Takeo Sasai, Fukutaro Hamaoka, Hiroki Kawahara, Takeshi Seki, Takeshi Kawasaki, and Junichi Kani
Opt. Express 28(2) 1640-1646 (2020)

Field trial of 24-Tb/s (60 × 400Gb/s) DWDM transmission over a 1910-km G.654.E fiber link with 6-THz-bandwidth C-band EDFAs

Anxu Zhang, Junjie Li, Lipeng Feng, Kai Lv, Fei Yan, Yusen Yang, Haiqiang Wang, Qifang Yang, Lingquan Wang, Xiaolei Zhang, Shibao Ding, Min Liao, Yi Yu, and Liangchuan Li
Opt. Express 29(26) 43811-43818 (2021)

Real-time superchannel transmission over 10,500 km submarine link at 4.66 b/s/Hz spectral efficiency

Aleš Kumpera, Vince Dominic, Ahmed Awadalla, Lee Dardis, Jeffrey Rahn, Steve Sanders, Matthew Mitchell, Pierre Mertz, Gary Shartle, Scott Jackson, Stanley Blakey, Mina Sokar, David Krause, Han Sun, Kuang-Tsan Wu, and Paul Cannon
Opt. Express 26(12) 15039-15044 (2018)

Dual-polarization multi-band optical OFDM transmission and transceiver limitations for up to 500 Gb/s uncompensated long-haul links

E. Giacoumidis, M. A. Jarajreh, S. Sygletos, S. T. Le, F. Farjady, A. Tsokanos, A. Hamié, E. Pincemin, Y. Jaouën, A. D. Ellis, and N. J. Doran
Opt. Express 22(9) 10975-10986 (2014)

Dual-polarization multi-band OFDM versus single-carrier DP-QPSK for 100 Gb/s long-haul WDM transmission over legacy infrastructure

J. Karaki, E. Giacoumidis, D. Grot, T. Guillossou, C. Gosset, R. Le Bidan, T. Le Gall, Y. Jaouën, and E. Pincemin
Opt. Express 21(14) 16982-16991 (2013)