脉宽依赖的飞秒激光成丝钳制光强的研究  

Pulse-Duration-Dependent Clamping Intensity in Femtosecond Laser Filament

作　　者：张旋 王铁军[1,2] 郭豪 孙海轶 李儒新[1,2] Zhang Xuan;Wang Tiejun;Guo Hao;Sun Haiyi;Li Ruxin(State Key Laboratory of High Field Laser Physics , Shanghai Institute of Optics and Fine Mechanics ,Chinese Academy of Sciences , Shanghai 201800, China;Center of Materials Science and Optoelectronics Engineering , University of Chinese Academy of Sciences ,Beijing 100049, China)

机构地区：[1]中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海201800 [2]中国科学院大学材料与光电研究中心,北京100049

出　　处：《中国激光》2019年第9期30-36,共7页Chinese Journal of Lasers

基　　金：中国科学院战略性先导科技专项(B类)(XDB16010400),中国科学院国际合作重点项目(181231KYSB20160045)

摘　　要：研究了飞秒激光成丝过程中钳制光强对脉宽的依赖关系。对不同脉宽成丝钳制光强进行直接实验测量,发现当脉宽逐渐展宽(由45 fs展宽至177 fs)时,对应的钳制光强逐渐减小。实验结论与通过求解非线性薛定谔方程得到的数值模拟结果一致。依赖于脉宽的钳制光强的分析结果可为深入理解与脉宽相关的光丝应用提供科学依据和新思路。Herein, the pulse-duration-dependent clamping intensity in a femtosecond laser filament is systematically investigated. The clamping intensity in the laser filament is directly measured. Results show that the clamping intensity gradually decreases as the pulse duration stretches from 45 fs to 177 fs. The experimental results are in a good agreement with the simulation results obtained by solving the nonlinear Schrodinger equation. The analysis of pulse-duration-dependent clamping intensity in the laser filament provides scientific basis and new ideas for fully understanding intensity related filament applications.

关 键 词：激光器 飞秒现象 飞秒激光成丝 钳制光强 啁啾 

分 类 号：O436[机械工程—光学工程]