• High Power Laser Science and Engineering
  • Vol. , Issue , ()
Shen Liya, Li Yanyan, Li Wenkai, Song Jiajun, Junyu Qian, Sun Jianyu, Feng Renyu, Peng Yujie, leng yuxin
Author Affiliations
  • Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences
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    Abstract

    Temporal contrast directly affects the interaction between the ultraintense and ultrashort pulse laser with matter. Seed laser sources with broad bandwidth and high temporal contrast are significant for overall temporal contrast enhancement. The technique of cascaded nonlinear processes with optical parametric amplification (OPA) and second harmonic generation (SHG) is demonstrated for high temporal contrast seed source generation. Within 40 ps before the main pulse, the temporal contrast reaches over 10<sup>11</sup>. The pulse energy and duration of the high contrast pulse are 112 μJ and 70 fs, respectively. Considering its high beam quality and stability, this laser source can serve as a high-quality seed for Nd: glass-based ultraintense and ultrashort pulse laser facilities.
    Manuscript Accepted: Nov. 23, 2022
    Posted: Nov. 24, 2022