充气毛细管中飞秒激光四波混频的理论描述  

Theoretical description of four-wave mixing of femtosecond pulses in gas-filled capillary

作　　者：陈宝振[1] 黄祖洽[2] 

机构地区：[1]北京师范大学粒子束和材料改性教育部重点实验室,北京100875 [2]北京师范大学低能核物理研究所,北京100875

出　　处：《物理学报》2004年第12期4218-4223,共6页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :90 10 3 0 2 5 );高等学校博士学科点专项科研基金(批准号:2 0 0 2 0 0 2 70 0 6)资助的课题~~

摘　　要：建立了一个描写充气毛细管中飞秒激光四波混频过程的理论框架 .在这个理论框架的基础上 ,对最近得到的充气毛细管中飞秒激光四波混频过程的信号强度 气压实验曲线给出了初步的理论说明 .发现考虑走离效应和相调制效应对充气毛细管中飞秒激光四波混频过程有重要的作用 .同时还发现在一定的条件下 。The coupled equations of four-wave mixing by femtosecond pulses in gas-filled capillary are derived. Based on the equations,the influence of the walk-off and phase modulation is investigated. It is found that the discrepancy between the theoretical and experimental results decreases when the influence of the walk-off and phase modulation is taken into account. At the same time,it is also found that taking the influence of the 3rd harmonic generated by the idler light into account is necessary for reducing the discrepancy between the theoretical and experimental results.

关 键 词：四波混频 飞秒激光 理论描述 调制效应 信号强度 直接 毛细管 实验曲线 三次谐波 发现 

分 类 号：TN24[电子电信—物理电子学]