二芯非线性光栅耦合器的开关特性研究  

Reseach about the Switching Character of Two-Core Nonlinear Fiber Bragg Grating Couplers

作　　者：李齐良[1] 华晓锋[1] 张爱辛[1] 曾然[1] 

机构地区：[1]杭州电子科技大学通信工程学院通信与信息系统研究所,杭州310018

出　　处：《电子器件》2011年第4期428-431,共4页Chinese Journal of Electron Devices

基　　金：国家自然科学基金(10904028);浙江省自然科学基金(Y1110078)

摘　　要：光纤光栅耦合器既有光栅的反射滤波特性,又有耦合器的多端口特性,是一种重要的光学器件。在龙格-库塔算法的基础上,研究了一种新的算法来计算光纤光栅耦合器的非线性耦合模方程。研究表明,随着输入功率的增大,折射率发生非线性变化,布拉格反射域发生偏移,从而使原本在光栅带隙内的脉冲通过光栅。另外在该算法的基础上,对光纤光栅耦合器的开关特性及不同输入功率下的输出响应进行了分析。Fiber Bragg-grating couplers are the important devices which have excellent filter characteristics and couplers＇ multi-port features. We have developed a new numerical procedure based on the Runge-Kutta algorithm to solve the solutions of the nonlinear coupled-mode equations of the fiber Bragg grating couplers. Our calculations show the Bragg resonance is changed by the increase of the input power,thus leads the input wavelength changes from the stop band of the fiber Bragg gratings to the allowed band. Then,we analyzed the switching character of the fiber Bragg gating couplers and the output response under different input powers by this new algorithm.

关 键 词：光纤光栅耦合器 开关特性 透射率 算法 

分 类 号：TN929[电子电信—通信与信息系统]