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A 61-mJ, 1-kHz cryogenic Yb: YAG laser amplifier |
Huijun He(何会军)1,2, Jun Yu(余军)1, Wentao Zhu(朱文涛)1, Qingdian Lin(林庆典)1, Xiaoyang Guo(郭晓杨)1,†, Cangtao Zhou(周沧涛)1, and Shuangchen Ruan(阮双琛)1,2 |
1 Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Advanced Material Diagnostic Technology, and College of Engineering Physics, Shenzhen Technology University(SZTU), Shenzhen 518118, China; 2 College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China |
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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 M2 parameter of the output laser is <1.4.
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Received: 27 May 2021
Revised: 09 July 2021
Accepted manuscript online: 14 July 2021
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PACS:
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42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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42.60.-v
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(Laser optical systems: design and operation)
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42.60.Rn
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(Relaxation oscillations and long pulse operation)
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Fund: 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). |
Corresponding Authors:
Xiaoyang Guo
E-mail: guoxiaoyang@sztu.edu.cn
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Cite this article:
Huijun He(何会军), Jun Yu(余军), Wentao Zhu(朱文涛), Qingdian Lin(林庆典), Xiaoyang Guo(郭晓杨), Cangtao Zhou(周沧涛), and Shuangchen Ruan(阮双琛) A 61-mJ, 1-kHz cryogenic Yb: YAG laser amplifier 2021 Chin. Phys. B 30 124206
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