基于参量放大的BPSK信号相位噪声监控方案

All-optical Phase Noise Monitoring for BPSK Signal Based on Parametric Amplifying

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40Gbit/s BPSK信号,该方案可以实现0~0.4Vπ范围内相位噪声的全光监控。

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 amplifying 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 V. for 40 Gbit/s BPSK signal.