光子晶体光纤中正啁啾对色散波及孤子俘获的调控作用  

The Regulation and Control of Positive Chirp over Dispersive Wave and Soliton Trapping in PCF

作　　者：黄颖[1] 

机构地区：[1]湖南大学信息科学与工程学院,微纳光电器件及应用教育部重点实验室,湖南长沙410082

出　　处：《湘潭大学自然科学学报》2016年第4期10-14,共5页Natural Science Journal of Xiangtan University

基　　金：国家自然科学基金项目(61275137);教育部新世纪优秀人才支持计划(NCET-12-0166)

摘　　要：基于飞秒脉冲在光子晶体光纤中传输时所遵循的非线性薛定谔方程,利用数值模拟的方法研究了脉冲初始正啁啾在超连续谱的产生过程中对色散波及孤子俘获的影响.结果表明:正啁啾能显著提升色散波的产生效率,且色散波的强度与啁啾值成正比.当啁啾值不超过某一临界值且满足相位匹配条件时,孤子和色散波之间的四波混频效应能产生俘获波,俘获波的强度与孤子能量及色散波强度有关.因此,选择合适的啁啾值,利用正啁啾对色散波及俘获波的调控作用可以提高超连续谱蓝端的能量分部.This paper discusses the effects that positive chirps have on the dispersive waves and soltiton trapping based on nonlinear Schdinger equation during the femtosecond pulses transmitted in the PCF by using the method of numerical simulation.The result shows：positive chirps can promote the efficience of dispersive wave generation dramatically,and the intensity of dispersive wave is proportional to the values of chirps.When the values of chirps don＇t exceed some critical value and meet the phase matching,the trapping waves,whose intensity has something with soliton energy and dispersive intensity,is generated by the FWM between solitons and dispersive waves.So we can improve the blue-shift energy of SC spectrum by using positive chirp which can regulate and control dispersive waves and trapping waves.

关 键 词：超连续谱 啁啾 色散波 孤子俘获 

分 类 号：O436.2[机械工程—光学工程]