A Self-Diffraction Temporal Filter for Contrast Enhancement in Femtosecond Ultra-High Intensity Laser  

作　　者：Xian-Zhi Wang Zhao-Hua Wang Yuan-Yuan Wang Xu Zhang Jia-Jun Song Zhi-Yi Wei 王羡之;王兆华;王媛媛;张旭;宋贾俊;魏志义(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China;Songshan Lake Materials Laboratory,Dongguan 523808,China;CAS Center for Excellence in Ultra-intense Laser Science,Shanghai 201800,China)

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Songshan Lake Materials Laboratory,Dongguan 523808,China [4]CAS Center for Excellence in Ultra-intense Laser Science,Shanghai 201800,China

出　　处：《Chinese Physics Letters》2021年第7期40-44,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant Nos.11774410 and 91850209);the Strategic Priority Research Program of CAS(Grant No.XDB16030200).

摘　　要：We demonstrated a nonlinear temporal filter based on the self-diffraction(SD)process.Temporal contrast enhancement,angular dispersion and spectrum broadening properties of the SD process are investigated in experiment and simulation.Driven by spectral phase well compensated laser pulses with bandwidth of 28 nm,the filter produced clean pulses with a temporal contrast higher than 10^(10) and excellent spatial profile,the spectrum of which was smoothed and broadened to 64 nm.After implementing this filter into a home-made 30 TW Ti:sapphire amplifier,temporal contrast of the amplified pulses was enhanced to 10^(10) within the time scale of−400 ps.

关 键 词：AMPLIFIER FEMTO FILTER 

分 类 号：TN24[电子电信—物理电子学] TN713