无损光纤中与位相相关的扰动演化行为  

Phase-dependent evolution behavior of perturbation in lossless optical fibers

作　　者：钟先琼[1] 陈建国[1] 李大义[1] 林晓东[1] 冯国英[1] 

机构地区：[1]四川大学电子信息学院

出　　处：《激光技术》2005年第2期190-193,共4页Laser Technology

基　　金：中国工程物理研究院与国家自然科学基金会联合资助项目(10176019)

摘　　要：利用小信号近似下线性化的非线性薛定谔方程导出了光纤中扰动幅度和位相的解析表达式;计算并讨论了扰动幅度和位相随传输距离的演化规律;在极坐标下给出了扰动相矢(phasor)顶点运动的轨迹,分析讨论了轨迹特征及其渐近行为。结果表明,扰动的初始位相对扰动的演化规律有强烈的影响。Using the linearized nonlinear Sc hrdinger equation obtained with the aid of the small signal approximation,ana lytical expressions for the amplitude and phase of a perturbation propagating in an optical fiber have been deduced.The evolution characteristics of the amplitu de and phase of the perturbation has been calculated and discussed.The moving tr ajectories portrayed by the perturbation phasors have been obtained under the po lar coordinates.The characteristics and the asymptotic behaviors of the trajecto ries have been analyzed.The results show that the evolution of the perturbation is intensively influenced by the initial perturbation phase.

关 键 词：扰动调制不稳定 小信号近似 非线性薛定谔方程 扰动演化 

分 类 号：O437[机械工程—光学工程] TN929.11[理学—光学]