Nonlinear Phase Noise Estimate Based on Electronic Orthogonal Coherent for 112 Gb/s PDM-4QAM System

Baocun Wang¹, Bin Li^1,2*, Fengguang Luo¹, Benxiong Huang^2,3, Ming Tian¹, Xuecheng Zou¹

¹Institute of Optics and Electronic Imformation, Huazhong University of Science and Technology, Wuhan, China.
²School of Electronic and Imformation Engineering, Huazhong University of Science and Technology, Wuhan, China.
³National Engineering Laboratory for Next Generation Internet Acess System, Wuhan, China.

DOI: 10.4236/opj.2014.411032                

Abstract

In this paper, we proposed a novel method of joint phase noise estimate (JPNE) for PDM-M-QAM (M = 4, 16, 32, 64, …) transmission systems, and established the theoretical model to illustrate the operation mechanism. The simulation of laser phase noise and fiber nonlinearity compensation based on the proposed JPNE method had also been demonstrated. For 112 Gb/s PDM-4QAM transmission system, the simulation results had showed that the optimum launch power increased from -4 dBm to at least 0 dBm compared with the condition of no phase noise compensation in reach of all simulation distances.

Keywords

Joint Phase Noise Estimate, Fiber Nonlinearity, PDM-4QAM, Optimum Launch Power, Phase Noise Compensation

Conflicts of Interest

The authors declare no conflicts of interest.

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