基于硅氧化石墨烯波导相敏放大的8PSK信号幅相再生

Amplitude-Phase Regeneration of 8PSK Signals Based on Phase-Sensitive Amplification by Silicon Graphene Oxide Waveguide

研究了在硅氧化石墨烯混合波导中利用相敏参量放大器(PSA)实现八相相移键控(8PSK)信号的幅相再生。采用水平和竖直沟槽相结合的新型波导结构,在水平沟槽处填充高克尔系数材料氧化石墨烯,设计了在1330 nm和1550 nm处具有两个零色散点,非线性系数高达10^(6) W^(-1)·m^(-1)的新型硅氧化石墨烯混合波导。利用该波导设计了8PSK信号两级幅相再生方案,相位再生阶段采用双泵浦简并PSA结构来实现,幅度再生阶段基于饱和四波混频效应的波长转换来实现,最终实现了8PSK信号在相位和幅度维度上的再生。利用星座图、误差矢量幅度和光信噪比对信号的再生性能进行了评估。结果表明,这种波导PSA具有良好的幅相再生和噪声压缩能力,在全光信号处理中有着重要的应用前景。

The amplitude-phase regeneration of 8-phase shift keying(8PSK)signal using a phase-sensitive parametric amplifier(PSA)in a silicon graphene oxide hybrid waveguide is investigated.A novel graphene oxide hybrid waveguide with two zero dispersion points at 1330 nm and 1550 nm and a nonlinear coefficient of up to 10^(6) W^(-1)·m^(-1)was designed by using a horizontal and vertical groove structure filled with high Kerr coefficient material graphene oxide.A two-stage amplitude-phase regeneration scheme for 8PSK signal is designed using this waveguide,where the phase regeneration stage is realized with a double-pumped degenerate PSA structure,and the amplitude regeneration stage is realized by wavelength conversion based on saturated four-wave mixing effect,which ultimately achieves the regeneration of the8PSK signal in both phase and amplitude dimensions.The regeneration performance of the signal is evaluated using constellation diagram、the error vector magnitude and optical signal-to-noise ratio.The results show that this waveguide PSA has good amplitude-phase regeneration and noise compression capabilities,and has important application prospects in all-optical signal processing.