新型全光纤高能量飞秒光脉冲源的数值模拟  

Numerical Simulations of Novel All-Fiber Source of High Energy Femtosecond Pulses

作　　者：孟义昌[1,2] 张书敏[1,2] 靳春江[1,2] 李辉辉[1,2] 王新占[1,2] 

机构地区：[1]河北师范大学物理科学与信息工程学院,石家庄050016 [2]河北师范大学河北省新型薄膜材料实验室,石家庄050016

出　　处：《光子学报》2010年第3期412-416,共5页Acta Photonica Sinica

基　　金：河北省自然科学基金(F2009000321);河北师范大学重点基金(130243);河北师范大学博士科研启动基金(L2005B05)资助

摘　　要：数值模拟了自相似脉冲的产生与压缩,得到一种产生高能量飞秒光脉冲的新方法.结果表明:利用掺铒光纤对光脉冲进行自相似传输,可得到含线性频率啁啾的高能量自相似光脉冲;自相似光脉冲经过空芯光子带隙光纤的一级线性压缩和高非线性光纤的二级非线性压缩,可获得高峰值功率的飞秒光脉冲;压缩过程中存在最佳光纤长度;喇曼自频移和自陡效应对脉冲压缩产生不利影响.The generation and compression of parabolic similariton pulses are investigated numerically,and a novel method of generating high-energy femtosecond pulses is obtained.The results show that the high-energy parabolic pulses with linear chirp can be obtained by propagating of pulses inside the Erbium-doped fibers.Employing the linear compression with hollow core photonic bandgap fibers in the first stage and the nonlinear compression with highly nonlinear fiber in the second stage,the parabolic similariton pulse can be compressed into a femtosecond pulse with high peak power.There is an optimum fiber length for the pulse compression,and the Raman self-frequency shift and the self-steepening effects are disadvantageous for pulse compression.

关 键 词：自相似脉冲 脉冲压缩 空芯光子带隙光纤 超短光脉冲 

分 类 号：TN252[电子电信—物理电子学]