QPSK信号下富碳化硅双slot波导的相位敏感放大特性研究  

Study on phase-sensitive amplification characteristics of C-rich SiC double-slot waveguides under QPSK signal

作　　者：贺锋涛 蔡旻辉 靳晨卓 张建磊 HE Feng-tao;CAI Min-hui;JIN Chenzhuo;ZHANG Jian-lei(School of Electronic Engineering,Xi'an University of Posts and telecommunications,Xi'an,710121,China)

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121

出　　处：《激光与红外》2022年第11期1683-1688,共6页Laser & Infrared

基　　金：国家自然科学基金项目(No.61805199);国防基础科研计划实验室稳定支持专题项目(No.JCKY2020207CD02);“陕西省微波光子与光通信创新团队”资助专项(No.2021TD-09)资助。

摘　　要：相位敏感放大可以改善光通信传输链路的传输性能,是全光信号处理领域中的重要组成部分。本文通过结合一种碳硅原子比为1.28的富碳化硅,构建了水平双slot结构的硅基波导模型。该模型的色散平坦部分覆盖500 nm左右的波段且具有多个零色散点,非线性系数最高可达20000 W^(-1)·m^(-1)。通过采用有限元法分析计算其在通信波段的模场分布、色散特性及非线性特性。同时结合结构尺寸优化后的波导模型,建立了在硅基波导中基于四波混频效应的光传输模型,并求解分析了该波导在QPSK信号下的相位敏感特性。仿真结果表明该波导可以实现34 dB相敏增益,在片上信号处理领域具有潜在的应用前景。Phase-sensitive amplification(PSA),as an important part of all optical signal processing,can improve the transmission property of optical communication link.In this paper,the horizontal double-slot silicon waveguides model is constructed by combining the C rich SiC with an atom ratio of 1.28 C to Si.The dispersion flat part of the model approximately covers the wavebands of 500 nm with multiple zero-dispersion points,and the nonlinear coefficient can reach up to 20000 W^(-1)·m^(-1).The finite element method is used to analyze and calculate the mode field distribution,dispersion characteristics and nonlinear characteristics in the communication band.Meanwhile,combined with the optimized structure size waveguide model,the optical transmission model based on four-wave mixing(FWM)effect in silicon waveguide is established,and the phase sensitive characteristics of the waveguides under QPSK signal are solved and analyzed.The simulation results show that the waveguide can achieve 34 dB phase-sensitive gain and has potential applications in the field of on-chip signal processing.

关 键 词：全光信号处理 相位敏感放大 硅基波导 富碳化硅 四波混频 

分 类 号：TN252[电子电信—物理电子学]