High-energy picosecond single-pass multi-stage optical parametric generator and amplifier
Yang Yu(余洋)1,3,†, Zhao Liu(刘钊)1,†, Ke Liu(刘可)1,2,‡, Chao Ma(马超)1,3, Hong-Wei Gao(高宏伟)1,2, Xiao-Jun Wang(王小军)1,2, Yong Bo(薄勇)1,2, Da-Fu Cui(崔大复)1,2, and Qin-Jun Peng(彭钦军)1,2
1 Key Laboratory of Solid-state Lasers, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; 2 Key Laboratory of Functional Crystal and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China; 3 University of Chinese Academy of Sciences, Beijing 100190, China
Abstract We demonstrate a new management of multi-stage optical parametric generator (OPG) and amplifier (OPA) to obtain high-energy picosecond sources with high beam quality. The setup of multi-stage OPG-OPA requires mode-matching between the pump beam and the stable mode of the OPG-OPA. In a proof-of-principle experiment, the single-pass multi-stage OPG-OPA consists of three walk-off compensated KTP crystal pairs and two lenses, pumped by an 86 ps, 1064 nm 10 kHz picosecond laser. The signal light at ~1.77 μm has an average output power of 502 mW with record energy up to 50.2 μJ. The beam quality factor of the signal light can be improved to after filtering out about 40% signal power. To the best of our knowledge, it is the first picosecond single-pass multi-stage OPG-OPA pumped at kHz regime.
Fund: This work was supported by the National Science Foundation for Young Scientists of China (Grant No. 61805259), and Youth Innovation Promotion Association, CAS, and Chinese Academy of Sciences funding (Grant No. ZDRW-KT-2019-4-01).
Corresponding Authors:
Ke Liu
E-mail: liuke0209@mails.ucas.ac.cn
Cite this article:
Yang Yu(余洋), Zhao Liu(刘钊), Ke Liu(刘可), Chao Ma(马超), Hong-Wei Gao(高宏伟), Xiao-Jun Wang(王小军), Yong Bo(薄勇), Da-Fu Cui(崔大复), and Qin-Jun Peng(彭钦军) High-energy picosecond single-pass multi-stage optical parametric generator and amplifier 2022 Chin. Phys. B 31 014204
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