Abstract

We propose and experimentally demonstrate a simplified multiple-input multiple-output Volterra filter (MIMO-VF) in a polarization division multiplexed (PDM) twin single side-band (SSB) scheme based on two offset carriers. The right side-band (RSB) and left side-band (LSB) signals of the twin-SSB in each polarization are separated by an optical filter, and the crosstalk between the RSB and LSB is mitigated in the receiver digital signal processing (DSP) by the proposed simplified MIMO-VF, which is combined with one two-stage equalizer, i.e., a linear 2 × 2 butterfly MIMO equalizer and two independent VFs. With the proposed simplified MIMO-VF, we experimentally demonstrate a 400-Gb/s four-level pulse amplitude modulation (PAM-4) signal transmission over an 80-km standard single mode fiber (SSMF). Compared with the traditional MIMO-VF, the proposed simplified MIMO-VF can retain the same transmission performance and reduce the computational complexity by approximately 57.9%.

Zero-guard band dual-SSB PAM4 signal transmission with joint equalization scheme

Jingchi Li, Shaohua An, and Yikai Su
Opt. Lett. 45(22) 6178-6181 (2020)

Simplified twin-single-sideband direct detection system separating left and right sideband signals using a digital signal processing algorithm instead of optical bandpass filters

Ye Zhou, Jiangnan Xiao, Chuang Zhao, Jiangli Zuo, Jun Ming, and Li Zhao
Opt. Express 30(1) 619-628 (2022)

Asymmetric direct detection of twin-SSB signals

Xueyang Li, Mingyue Zhu, Zhenping Xing, Maurice O’Sullivan, and David V. Plant
Opt. Lett. 45(4) 844-847 (2020)

Optical single side-band Nyquist PAM-4 transmission using dual-drive MZM modulation and direct detection

Mingyue Zhu, Jing Zhang, Xingwen Yi, Hao Ying, Xiang Li, Ming Luo, Yingxiong Song, Xiatao Huang, and Kun Qiu
Opt. Express 26(6) 6629-6638 (2018)

Direct detection of polarization multiplexed single sideband signals with orthogonal offset carriers

Yixiao Zhu, Mingxuan Jiang, and Fan Zhang
Opt. Express 26(12) 15887-15898 (2018)