Chinese Optics Letters, 2016, 14 (2): 023201, Published Online: Sep. 21, 2018
High contrast amplification at 1053 nm limited by pulse stretching-compressing process
Abstract
We report on our high-contrast laser based on high-contrast, high-energy seed injection, low-gain optical parametric 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 μJ 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.
Xiaoming Lu, Yujie Peng, Yanyan Li, Xiaoyang Guo, Yuxin Leng, Zhan Sui, Yi Xu, Xinliang Wang. High contrast amplification at 1053 nm limited by pulse stretching-compressing process[J]. Chinese Optics Letters, 2016, 14(2): 023201.