Abstract

We experimentally demonstrate C-band $2\times 56\mathrm{Gb}/\mathrm{s}$ pulse-amplitude modulation (PAM)-4 signal transmission over 100 km standard single-mode fiber (SSMF) using 18 GHz direct-modulated lasers (DMLs) and direct detection, without inline optical amplifier. A delay interferometer (DI) at the transmitter side is used to extend the transmission reach from 40 to 100 km. A digital Volterra filter at the receiver side is used to mitigate the nonlinear distortions. We obtain an average bit error ratio (BER) of $1.5\times {10}^{-3}$ for $2\times 56\mathrm{Gb}/\mathrm{s}$ PAM-4 signal after 100 km SSMF transmission at the optimal input power, which is below the 7% forward error correction (FEC) threshold ($3.8\times {10}^{-3}$).

© 2016 Optical Society of America

2 × 64 Gb/s PAM-4 transmission over 70 km SSMF using O-band 18G-class directly modulated lasers (DMLs)

Fan Gao, Shiwei Zhou, Xiang Li, Songnian Fu, Lei Deng, Ming Tang, Deming Liu, and Qi Yang
Opt. Express 25(7) 7230-7237 (2017)

Single-lane 180  Gbit/s PAM-4 signal transmission over 2  km SSMF for short-reach applications

Qiang Zhang, Nebojsa Stojanovic, Cristian Prodaniuc, Changsong Xie, Michael Koenigsmann, and Piotr Laskowski
Opt. Lett. 41(19) 4449-4452 (2016)

Single-lane 180  Gb/s DB-PAM-4-signal transmission over an 80  km DCF-free SSMF link

Qiang Zhang, Nebojsa Stojanovic, Jinlong Wei, and Changsong Xie
Opt. Lett. 42(4) 883-886 (2017)

Radial basis function neural network enabled C-band 4 × 50  Gb/s PAM-4 transmission over 80  km SSMF

Zheng Yang, Fan Gao, Songnian Fu, Xiang Li, Lei Deng, Zhixue He, Ming Tang, and Deming Liu
Opt. Lett. 43(15) 3542-3545 (2018)

C-band 56-Gb/s PAM4 transmission over 80-km SSMF with electrical equalization at receiver

Xizi Tang, Shuangyue Liu, Zhongliang Sun, Han Cui, Xuekai Xu, Jia Qi, Mengqi Guo, Yueming Lu, and Yaojun Qiao
Opt. Express 27(18) 25708-25717 (2019)