基于参量放大的BP SK信号相位噪声监控方案

摘要

Phase noise is one of the key limitations for phase-modulated signal in high-speed optical communication system as its information is coded in the optical phase.Therefore,phase noise monitoring technique is highly required in future reconfigu-rable and flexible optical communication system.It can provide real-time information about the quality of the transmitted signal during the fiber transmission.In this paper,we apply the phase sensitive characteristic in the parametric amplifying process and propose a phase noise monitoring method for Binary Phase Shift Keying (BPSK)signal based on dual-pump parametric am-plifying in highly nonlinear fiber.The simulation results show that the phase noise monitoring can be successfully achieved in the range of 0 to 0.4 Vπfor 40 Gbit/s BPSK signal.%相位噪声是限制新型调制信号传输性能的主要因素之一。相位噪声监控技术可以实时、动态地获取系统性能，是未来高性能光纤通信系统中的关键技术之一。利用参量放大过程对参与信号相位敏感的特性，提出了一种基于双泵浦参量放大的全光BPSK(二进制相移键控)信号相位噪声监控方案。系统仿真结果表明，针对40 Gbit/s BPSK信号，该方案可以实现0~0.4 Vπ范围内相位噪声的全光监控。