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Temporal contrast enhancement of ultrashort pulses using a spatiotemporal plasma-lens filter

Ping Zhu, Arie Zigler, Xinglong Xie, Dongjun Zhang, Qingwei Yang, Meizhi Sun, Jenya Papeer, Jun Kang, Qi Gao, Xiao Liang, Haidong Zhu, Ainlin Guo, Yan Liang, Shengzhe Ji, Lei Ren, Huiya Liu, Ning Kang, Yao Zhao, and Jianqiang Zhu

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Abstract

The spatiotemporal plasma-lens filter proposed here enhances the temporal contrast of the ultrashort pulse laser by combining plasma optics and spatial filtering. Experimentally, the spatiotemporal plasma-lens filter has improved the temporal contrast by 2 orders of magnitude with 80% laser transmission efficiency under a 1 Hz repetitive laser operation. Not only were the pre-pulse and the pedestal cleaned out, but also the rising edge of the main pulse was sharpened.

© 2020 Optical Society of America

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