A 61-mJ, 1-kHz cryogenic Yb:YAG laser amplifier

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 puls...

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Veröffentlicht in:	Chinese physics B 2021-12, Vol.30 (12), p.124206-496
Hauptverfasser:	He, Huijun, Yu, Jun, Zhu, Wentao, Lin, Qingdian, Guo, Xiaoyang, Zhou, Cangtao, Ruan, Shuangchen
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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Zusammenfassung:	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.
ISSN:	1674-1056
DOI:	10.1088/1674-1056/ac140d