High contrast amplification at 1053 nm limited by pulse stretching-compressing process  

作　　者：陆效明 彭宇杰 李妍妍 郭晓杨 冷雨欣 隋展 许毅 王新亮 

机构地区：[1]School of Physics Science and Engineering,Tongji University [2]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences [3]Shanghai Institute of Laser Plasma

出　　处：《Chinese Optics Letters》2016年第2期88-92,共5页中国光学快报（英文版）

摘　　要：We report on our high-contrast laser based on high-contrast, high-energy seed injection, low-gain optical para- metric chirped pulse amplification （OPCPA）, and Nd：glass amplifiers, which can be used as the high-contrast front end of a high-power Nd：glass chirped pulse amplification （CPA） laser system. The energy of the stretched 1053 nm high-contrast seed pulse increases to 60 DJ by optimizing the frequency doubling crystal in the pulse cleaning device. After passing through a two-stage low-gain OPCPA, a 2-pass 2-rod Nd：glass amplifier, and a compressor the amplified pulse of 131 mJ/282 fs is achieved. The third-order correlation scanning measurement shows that the pulse contrast in the tens of ps range is about 10^-7-10^-8. With the high-contrast seed passing through the stretcher and compressor only, the contrast measurement indicates that the stretching-compressing process leads mainly to the contrast degradation of the amplified pulse.We report on our high-contrast laser based on high-contrast, high-energy seed injection, low-gain optical para- metric chirped pulse amplification （OPCPA）, and Nd：glass amplifiers, which can be used as the high-contrast front end of a high-power Nd：glass chirped pulse amplification （CPA） laser system. The energy of the stretched 1053 nm high-contrast seed pulse increases to 60 DJ by optimizing the frequency doubling crystal in the pulse cleaning device. After passing through a two-stage low-gain OPCPA, a 2-pass 2-rod Nd：glass amplifier, and a compressor the amplified pulse of 131 mJ/282 fs is achieved. The third-order correlation scanning measurement shows that the pulse contrast in the tens of ps range is about 10^-7-10^-8. With the high-contrast seed passing through the stretcher and compressor only, the contrast measurement indicates that the stretching-compressing process leads mainly to the contrast degradation of the amplified pulse.

关 键 词：AMPLIFICATION Chirp modulation Frequency doublers GLASS Laser optics Ultrashort pulses 

分 类 号：TN722[电子电信—电路与系统]