高功率超短脉冲激光系统中光谱增益窄化补偿的调制函数  

Spectral gain narrowing compensation modulation function in high-power ultrashort-pulse laser system

作　　者：刘兰琴[1] 彭翰生[1] 魏晓峰[1] 曾小明[1] 彭志涛[1] 黄小军[1] 王晓东[1] 周凯南[1] 王逍[1] 朱启华[1] 楚晓亮[1] 郭仪[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心

出　　处：《强激光与粒子束》2005年第6期856-860,共5页High Power Laser and Particle Beams

基　　金：中国工程物理研究院行业科学技术预先研究基金资助课题(20030218)

摘　　要：设计了一种与高功率超短脉冲激光放大过程中获得的总增益、增益介质的带宽、激光带宽、脉冲中心波长等参数相关的调制函数,对激光放大过程中的光谱增益窄化进行补偿。此调制函数的优越性在于,对不同性能的激光系统,无需改变调制函数的形式就能适用。通过数值模拟的方法,讨论了在不同增益介质带宽、激光带宽、脉冲中心波长下的补偿效果。此调制函数在高功率超短脉冲激光系统中有良好的应用前景。A modulation function related to the total gain of amplifier chains was established to compensate the spectral gain narrowing in high-power ultrashort-pulse laser systems. The modulation function to be used for a system could be given by putting in all data of the system, including the spectrum of the total gain, bandwidths of the gain medium and laser pulse, and central wavelength. For different laser systems, the form of the modulation function could remain the same. Spectral compensation simulations for the SILEX-I Ti:sapphire laser system were conducted by modulating the seeding pulse with a designed function at different parameters of bandwidth of gain medium, laser spectral width and laser central wavelength etc. The simulation results indicate that this modulated function is very good for gain narrowing compensation. If the bandwidths of the gain medium can reach 220 nm, by modulating the seeding pulse, the output spectrum width will increase 15 nm or more.

关 键 词：超短脉冲 增益窄化 调制函数 光谱补偿 

分 类 号：TN248[电子电信—物理电子学]