全固态kHz啁啾脉冲飞秒激光放大器  

kHz pulse-pumped Ti:sapphire regenerative amplifier

作　　者：王兆华[1] 魏志义[1] 王鹏[1] 令维军[1] 田金荣[1] 张杰[1] 

机构地区：[1]中国科学院物理研究所,北京100080

出　　处：《强激光与粒子束》2005年第B04期117-120,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(60225005;60308001);中国科学院知识创新工程方向性项目;仪器研制项目资助课题

摘　　要：要建造大功率超强激光系统,必须将nJ量级的种子进行放大,以得到mJ量级以及更高能量的激光输出。为达到这个目的,必须使种子能量指数增加,再生腔放大器是实现这一目的的良好途径;同时,为了得到更稳定的激光输出,须采用高重复频率的泵浦源。为此,设计了一种kHz重复频率激光泵浦的再生放大器,使用15 mJ的527 nm的绿光泵浦,得到了约2.3 mJ的800 nm放大激光输出,同时,对其输出激光的光谱特性进行了测量,将带宽为40 nm的种子注入后,得到了光谱带宽约为30 nm激光输出。In order to get ultra-short intensity laser pulses, it is necessary to amplify the laser pulses from nJ level to mJ level. The regea amplifier is the best way to get high-energy laser pulse. It can amplify the seed from nJ level to mJ level quickly. And the output laser has a good spatial mode. A Ti： sapphire regenerative amplifier was designed in this paper. Otherwise, in order to make the output laser stable, a 1 kHz 527 nm green laser was used as the pump laser in the experiment. Using such a Ti, sapphire regenerative amplifier, a 12 nJ seed which was generated from a self mode-locking Ti：sapphire oscillator was amplified to energy of 2.3 mJ in a pulse at 1 kHz. The spectrum of the amplifier was also measured. When the 40 nm seed was injected into the cavity, a laser output of about 30 nm was obtained.

关 键 词：飞秒激光 CPA技术 再生腔放大技术 

分 类 号：O437[机械工程—光学工程]