无损光纤中与位相相关的扰动演化行为.PDFVIP

29 2 Vo.l 29, No. 2 2005 4 LASER TECHNOLOGY Apri,l 2005 : 2005 1, 2 1* 1 1 1 钟先琼 , 陈建国 , 李大义 , 林晓东 , 冯国英 ( 1. , 610064; 2. , 610041 : ; ; ( phasor , , : ; ; ; : O437; TN929. 11 : A Phasedependent evolution behavior of perturbation in lossless optical fibers 1, 2 1 1 1 1 ZHONG X ianqiong , CHEN Jian guo , LI Da yi , LING X iaodong , FENG Guoying ( 1. School of E lectron ics and In form ation Engineering, S ichuan University, Chengdu 610064, China; 2. Departm ent of 部 Optoelectron ic Technology, Chengdu Un iversity of Inform ation Technology, Chengdu 610041, Ch ina 辑 Abstrac t: Using the linearized nonlinear Schrdinger equation obtained w ith the aid of the sm all s ignal approxim ation, 编 analytical expressions for the amp litude and phase of a perturbation propagating in an optical fiber have been deduced. The 》 evolution characteristics of the am plitude and phase of the perturbation has been calcu lated and d iscussed. Them oving trajectories 术 portrayed by the perturbation phasors have been obtained under the polar coord inates. The characteristics and the asym ptotic 技 behaviors of the trajectories have been analyzed. The resu lts show that the evolution of the perturbation is intensively influenced by the in itial per