色散光纤中超连续谱的产生及多波长输出  

Generation and Multi Wavelength Output of Super-Continuum Spectrum in Dispersion Fiber

作　　者：朱呈良 吴文豪[1] 刘芹[1] 沈君凤[1] 

机构地区：[1]湖北大学计算机与信息工程学院,湖北武汉430062

出　　处：《通信技术》2015年第11期1234-1237,共4页Communications Technology

基　　金：湖北省高等学校省级大学生创新创业训练计划项目(201410512028)~~

摘　　要：超短脉冲在高非线性光纤中传输过程遵循非线性薛定谔方程,因此可通过分步傅里叶变换的方法对此过程进行数理模拟和分析。借用MATLAB工具软件产生一个高斯皮秒脉冲,研究脉冲通过色散光纤之后频谱得以展宽,从而能够通过阵列波导光栅(AWG)进行分波之后得到多波长输出的超连续谱。结果表明:使超连续谱频谱得以展宽的因素有很多,其中群速度色散值对其影响较为显著。对光纤及脉冲的各参数进行优化调节之后,再对色散参量D0进行微调,超连续谱将得到更好地修整优化,频谱变得更宽且平坦稳定。Transmission process of ultrashort pulse in high nonlinear fiber follows the nonlinear Schrodmger equation, and thus this process may be simulated and analyzed mathematically through the split-step Fou- rier method. A Gauss picoseconds pulse is generated by MATLAB software, and after pulse transmitting o- ver dispersion optical fiber, the spectrum could be broadened, and thus super-continuum spectrum of muhi wavelength output be obtained via AWG （Arrayed Waveguide Grating）. Results show that the factors mak- ing super-continuum spectrum broadened are various, and the group velocity dispersion plays a significant role. After optimal regulation of fiber and pulse parameters, and then fine-tuning of the dispersion parame- ter Do, super-continuum spectrum may receive better optimization, and the spectrum becomes wider while keeping flat and stable.

关 键 词：皮秒脉冲 薛定谔方程 群速度色散 色散参量 

分 类 号：TN929.11[电子电信—通信与信息系统]