摘要
超短脉冲激光系统中,足够宽的带宽是获得超短脉冲的先决条件.高增益放大器,特别是再生放大器的增益窄化效应严重制约着输出激光脉冲的时间特性.将可编程声光色散滤波器(AOPDF)应用到高功率激光系统中,能有效地克服增益窄化效应.实验表明,再生放大器的光谱宽度由未应用前的27nm增加到了44nm,压缩脉冲的宽度减小了一半,从而也使峰值功率提高了一倍.
Laser pulse durations are dominated by the spectral bandwidths in chirped pulse amplification systems. Therefore, gain narrowing during amplification is one of the most important factors that limits the minimal pulse durations of compressed pulses in high-power ultrashort-pulse laser systems. The gain narrowing can be compensated by applying an acousto-optic programmable dispersive filter(AOPDF) to the laser system. Here we present the experiments and results with an AOPDF for the 200-TW Ti: sapphire laser. The spectral bandwidth is increased from the original 27 nm to 44 nm. The pulse duration correspondingly is decreased from 60 fs to 30 fs and thus the output pulse power is doubled.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第6期2764-2768,共5页
Acta Physica Sinica
基金
中国工程物理研究院预研基金项目
中国工程物理研究院行业科学技术预先研究基金(批准号:20030218)资助的课题.~~
