Abstract

In this paper, we propose a polar-coded transmission system with adjustable data rate for coherent optical transmission employing quadrature amplitude modulation (QAM). The proposed system is based on a many-to-one constellation shaping method for achieving a range of data rates with arbitrarily small rate steps. An implicitly punctured polar-coded modulation system is then designed by combining polar coded bit-interleaved coded modulation system with many-to-one labelings. The scheme is experimentally evaluated in a wavelength division multiplexed (WDM) system with five carriers modulated at 16 GBaud with polarization multiplexed (PM) 256QAM. Data rates ranging from 121 to 182 Gb/s per carrier are experimentally demonstrated and the system can be directly extended to achieve higher data rates. Synchronization and equalization of PM-256QAM received symbols are performed with a pilot rate of 5%. The experimental results show 1.2 dB of shaping gain over the conventionally punctured polar codes in the optical back-to-back scenario. The maximum transmission system reach is increased by 200 to 400 km w.r.t the conventionally punctured polar codes. It is shown that the rate adaptation does not require a change of modulation format and/or underlying forward error-correction code. Finally, the performance of all five WDM channels is validated for the optimal input power.

© 2019 IEEE

Experimental demonstration of flexible information rate PON beyond 100 Gb/s with rate-compatible LDPC codes

Xiangli Zhang, Yunpeng Xuan, Zepeng Gong, Xu Zhang, Jie Li, Ming Luo, Bowen Jia, Dapeng Luo, Tianye Huang, and Xiang Li
Opt. Express 32(9) 15444-15459 (2024)

Polarization-multiplexed rate-adaptive non-binary-quasi-cyclic-LDPC-coded multilevel modulation with coherent detection for optical transport networks

Murat Arabaci, Ivan B. Djordjevic, Ross Saunders, and Roberto M. Marcoccia
Opt. Express 18(3) 1820-1832 (2010)

Polar coded probabilistic shaping PAM8 based on many-to-one mapping for short-reach optical interconnection

Honghang Zhou, Yan Li, Xiaoshuo Jia, Chao Gao, Yuyang Liu, Jifang Qiu, Xiaobin Hong, Hongxiang Guo, Yong Zuo, and Jian Wu
Opt. Express 29(7) 10209-10220 (2021)

Enhanced symbol capacity and loss budget employing joint channel coded modulation in DMT-WDM-PON

Hailian He, Jun Ming, Junyuan Song, Yuyao Wen, Dong Guo, Xiangjun Xin, Ran Gao, Zhipei Li, Xiaolong Pan, and Ze Dong
J. Opt. Commun. Netw. 15(12) 1030-1037 (2023)

Rate-Adaptive Modulation and Low-Density Parity-Check Coding for Optical Fiber Transmission Systems

Gwang-Hyun Gho and Joseph M. Kahn
J. Opt. Commun. Netw. 4(10) 760-768 (2012)