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Temporal contrast enhancement by self-phase modulation in a multi-pass cell with excellent beam quality and pointing stability

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【作者】刘寅飞；宋贾俊；陆效明；彭宇杰；李妍妍；高贯光；沈丽雅；朱君泽；徐天泽；冷雨欣；

【Author】 Yinfei Liu;Jiajun Song;Xiaoming Lu;Yujie Peng;Yanyan Li;Guanguang Gao;Liya Shen;Junze Zhu;Tianze Xu;Yuxin Leng;State Key Laboratory of Ultra-intense Laser Science and Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences;School of Physics and Optoelectronic Engineering,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences;School of Physical Science and Technology,ShanghaiTech University;

【通讯作者】宋贾俊;彭宇杰;冷雨欣;

【机构】 State Key Laboratory of Ultra-intense Laser Science and Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences； Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences； School of Physics and Optoelectronic Engineering,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences； School of Physical Science and Technology,ShanghaiTech University；

【摘要】 We demonstrate temporal contrast enhancement via self-phase modulation followed by spectral filtering in a gas-filled multi-pass cell(MPC). The performance of this temporal cleaning device has been thoroughly investigated, covering spectral broadening, efficiency, temporal contrast enhancement, power stability, beam quality, and beam pointing stability. Our device achieves a total efficiency exceeding 30%, corresponding to a pulse energy of 555 μJ. The temporal contrast of the filtered pulse is enhanced by more than two orders of magnitude, surpassing 10~9. The filtered beam exhibits excellent beam quality and pointing stability, with M~2values of 1.12 × 1.14 and an angular pointing stability of 1.90 μrad × 2.05 μrad. This approach, especially when combined with a second-stage spectral broadening device, provides an excellent front end for an ultra-wideband, high-peak-power laser system, offering high beam quality, excellent power stability, and outstanding pointing stability.更多还原

【Abstract】 We demonstrate temporal contrast enhancement via self-phase modulation followed by spectral filtering in a gas-filled multi-pass cell(MPC). The performance of this temporal cleaning device has been thoroughly investigated, covering spectral broadening, efficiency, temporal contrast enhancement, power stability, beam quality, and beam pointing stability. Our device achieves a total efficiency exceeding 30%, corresponding to a pulse energy of 555 μJ. The temporal contrast of the filtered pulse is enhanced by more than two orders of magnitude, surpassing 10~9. The filtered beam exhibits excellent beam quality and pointing stability, with M~2values of 1.12 × 1.14 and an angular pointing stability of 1.90 μrad × 2.05 μrad. This approach, especially when combined with a second-stage spectral broadening device, provides an excellent front end for an ultra-wideband, high-peak-power laser system, offering high beam quality, excellent power stability, and outstanding pointing stability.更多还原

【关键词】 temporal contrast enhancement； self-phase modulation； multi-pass cell；
【Key words】 temporal contrast enhancement； self-phase modulation； multi-pass cell；

【基金】 supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (Nos. XDA0380205 and XDB0890101);the Shanghai Municipal Science and Technology Major Project;the National Key Research and Development Program of China (No. 2022YFA1604400);the National Natural Science Foundation of China (Nos. 12388102, 62205351, 61925507, 62075227, 22227901, U21A20138, and 62375273);the Shanghai Rising-Star Program (No. 21QA1410200);the Youth Innovation Promotion Association of the Chinese Academy of Sciences (No. 2020248);the Shanghai Association for Science and Technology (Nos. 22DZ1100300, 22560780100, and 23560750200);the China Postdoctoral Science Foundation (No. GZC20232817)

【文献出处】 Chinese Optics Letters ,中国光学快报(英文版) , 编辑部邮箱 ,2026年02期

【分类号】TN24
【下载频次】3

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