A 61-mJ, 1-kHz cryogenic Yb:YAG laser amplifier*Project supported by the National National Science Foundation of China (Grant Nos. 12004262 and 62005184) and the Natural Science Foundation of Top Talent of SZTU (Grant No. 202024555101039). (December 2021)

• Record Type: Journal Article
• Authors: He 何, Huijun 会军; Yu 余, Jun 军; Zhu 朱, Wentao 文涛; Lin 林, Qingdian 庆典; Guo 郭, Xiaoyang 晓杨; Zhou 周, Cangtao 沧涛; Ruan 阮, Shuangchen 双琛
• Is Part Of: Chinese physics B. Volume 30:Number 12(2021)
• Publication Date: 2021-12
• Subjects: ytterbium laser system -- Yb:YAG laser amplifier -- cryogenic laser amplification -- high energy laser amplification; 42.60.Da -- 42.60.-v -- 42.60.Rn; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1674-1056/ac140d
• Languages: English
• ISSNs: 1674-1056

Abstract

Abstract : We report a diode-pumped rod-type Yb:YAG laser amplifier operating at 1 kHz.Cryogenic cooling method was adopted to make the Yb:YAG crystal work with four-level behavior. A single-frequency fiber laser acts as the seed in an actively Q -switched Yb:YAG oscillator. The resonator delivers 5.75-mJ pulses at 1 kHz with a pulse duration of approximately 40 ns. The pulses were amplified to 61 mJ in a four-pass rod-type Yb:YAG amplifier with optical-to-optical efficiency of 24% in the main amplifier. The M 2 parameter of the output laser is < 1.4.