有限束宽下超高斯光束经光栅对压缩的研究  

Study of super-Gaussian beam through grating pair compression in the case of finite beam size

作　　者：刘文兵[1] 冯国英[2] 朱启华[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,绵阳621900 [2]四川大学电子信息学院,成都610064

出　　处：《激光技术》2005年第3期261-265,共5页Laser Technology

基　　金：国家自然科学基金;中国工程物理研究院联合基金资助项目(10176019)

摘　　要：利用有限束宽下入射脉冲通过光栅对压缩的理论模型,从脉冲光束的傅里叶角谱入手,分析了脉冲超高斯光束单次及两次通过光栅对时的变换特性,以及高阶色散对脉冲压缩的影响。结果表明,脉冲超高斯光束单次通过光栅对压缩器时,横向谱移动使得出射光束产生时间相关的空间移动而两次通过压缩器时则会消除此种影响。高阶色散不仅影响输出脉冲的时间特性同时还影响其空间特性,导致输出脉冲波形扭曲,产生时空畸变。Using the theoretical model of pulsed beam through gra ting pair in the case of finite beam size and starting from the Fourier angle sp ectrum of the pulsed beam,the spatial and temporal properties of the pulsed sup er-Gaussian beam single and double passing compressor and the effects of high- order dispersion are studied.It’s found that when the pulsed super-Gaussian be am once passes through the grating pair,the time-dependent spatial shift will be introduced in the output pulse by the transverse spectrum shift,but the effe ct will be eliminated when twice passes and that high-order dispersion affects the spatial and temporal properties of the output pulse,causes the pulse front distortion and induces space-time aberration in the output pulse.

关 键 词：超高斯光束 光栅对 脉冲压缩 高阶色散 

分 类 号：O436[机械工程—光学工程]