Constellation-designed 32QAM with geometric and probabilistic shaping for optical fiber system

Kai Lv; Qi Zhang; Xiangjun Xin; Xishuo Wang; Wei Zhang; Ying Tao; Qinghua Tian; Feng Tian; Xiaolong Pan

doi:10.1117/1.OE.58.1.016101

5 January 2019 Constellation-designed 32QAM with geometric and probabilistic shaping for optical fiber system

Kai Lv, Qi Zhang, Xiangjun Xin, Xishuo Wang, Wei Zhang, Ying Tao, Qinghua Tian, Feng Tian, Xiaolong Pan

Author Affiliations +

Funded by: National Natural Science Foundation of China (NSFC), National Natural Science Foundation of China, NSFC, Natural Science Foundation of China, National NSFC, Beijing Nova Program, Fundamental Research Funds for the Central Universities, Beijing University of Posts and Telecommunications

Optical Engineering, Vol. 58, Issue 1, 016101 (January 2019). https://doi.org/10.1117/1.OE.58.1.016101

Abstract

A constellation-designed 32QAM method is proposed using geometric shaping (GS) and probabilistic shaping (PS). In addition, a 50-Gbaud polarization division multiplexed multispan optical fiber link for the proposed scheme is set up. The simulation results show that when the net data rate reaches 211 Gbit/s, the proposed 32QAM with GS and PS is capable of achieving about 0.1- and 0.3-dB OSNR gain over PS-32QAM and regular 32QAM (R-32QAM), respectively. When 213 Gbit/s net data rate transmission is achieved, the use of the proposed 32QAM can increase the transmission length by ∼60 km over PS-32QAM and ∼210 km over R-32QAM. Moreover, when OSNR is set to 19 dB and signal bandwidth is 40 Gbaud, the net data rate of the proposed 32QAM is 2 and 7.5 Gbit/s larger than PS-32QAM and R-32QAM, respectively.

Citation Download Citation

Kai Lv, Qi Zhang, Xiangjun Xin, Xishuo Wang, Wei Zhang, Ying Tao, Qinghua Tian, Feng Tian, and Xiaolong Pan "Constellation-designed 32QAM with geometric and probabilistic shaping for optical fiber system," Optical Engineering 58(1), 016101 (5 January 2019). https://doi.org/10.1117/1.OE.58.1.016101

Received: 19 October 2018; Accepted: 4 December 2018; Published: 5 January 2019

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