Demonstration of a double chirped-pulse-amplification front-end system to improve the temporal contrast at a sub-petawatt laser

作者：Xie, Na^*; Zhou, Kainan; Huang, Wanqing; Wang, Xiaodong; Sun, Li; Guo, Yi; Li, Qing

来源：Optical Engineering, 2012, 51(2): 024201.

DOI：10.1117/1.OE.51.2.024201

• ultra-intense and ultra-short laser
• chirped-pulse amplification
• temporal contrast
• amplified spontaneous emission

The temporal contrast is an important factor affecting the application of ultra-intense and ultra-short lasers. In this paper, we develop a double chirped-pulse-amplification (CPA) front-end system with an intermediate nonlinear temporal pulse filter to improve the temporal contrast at a sub-petawatt Ti:sapphire laser facility, i.e. the super intense laser for experiment on the extremes (SILEX-I). The temporal pulse filter employs cross-polarized wave (XPW) generation to suppress the amplified spontaneous emission (ASE). The design output energy is 320 mJ for the front-end system. The experimental results show that the output energy of the double CPA system is 360 mJ. The ASE pedestal is suppressed significantly and the temporal contrast is improved by around three orders of magnitude.

• 出版日期2012-2
• 单位中国工程物理研究院; 中国工程物理研究院激光聚变研究中心