100 kHz high power high beam quality nanosecond laser oscillator

Yang Tianli; Yang Jing; Zhou Wangzhe; Li Xuepeng; Wang Xiaojun; Peng Qinjun

doi:10.11884/HPLPB202335.230023

Volume 35 Issue 7

Jun. 2023

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Article Navigation > High Power Laser and Particle Beams > 2023 > 35(7): 071006

Yang Tianli, Yang Jing, Zhou Wangzhe, et al. 100 kHz high power high beam quality nanosecond laser oscillator[J]. High Power Laser and Particle Beams, 2023, 35: 071006. doi: 10.11884/HPLPB202335.230023

Citation:

Yang Tianli, Yang Jing, Zhou Wangzhe, et al. 100 kHz high power high beam quality nanosecond laser oscillator[J]. High Power Laser and Particle Beams, 2023, 35: 071006. doi: 10.11884/HPLPB202335.230023

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100 kHz high power high beam quality nanosecond laser oscillator

doi: 10.11884/HPLPB202335.230023

Yang Tianli^{1, 2, 3
,},
Yang Jing^{1, 2, 4
,
,},
Zhou Wangzhe^{1, 2, 3},
Li Xuepeng^{1, 2, 4},
Wang Xiaojun^{1, 2, 4
,
,},
Peng Qinjun^{1, 2, 4}

1.
Key Laboratory of Solid State Laser, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2.
Key Laboratory of Function 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
4.
Institute of Optical Physics and Engineering Technology, Qilu Zhongke, Ji’nan 250000, China

Received Date: 2023-02-13
Accepted Date: 2023-04-27
Rev Recd Date: 2023-05-09

Available Online: 2023-05-16

Publish Date: 2023-06-15

Abstract

Abstract

Nanosecond (ns) pulsed laser with high average power and high repetition rate is a potential solution for laser cutting, laser welding and many other processing applications. With the increase of pulse repetition rate, especially when it is higher than 50 kHz, it is difficult to accumulate enough upper state population in a limited time, and the stability of laser pulse becomes a challenge in the design of laser. The main oscillator power amplifier (MOPA) system is the main method currently used. It is difficult to obtain ns pulsed laser with high average power, high repetition rate and high beam quality through direct oscillation. In this paper, the quantitative relationship between the intensity stability of laser pulse and the pump rate is analyzed according to the simulation of high repetition rate Q-switched laser. Combined with the use of plane-concave lenses to make the cavity a thermal-near-unstable cavity with a large-volume fundamental mode, the balanced design of Nd:YAG acousto-optic (AO) Q-switched laser oscillator with high repetition rate, high power and high beam quality was realized. A direct oscillation of 100 kHz high power high beam quality ns pulsed laser by using side pumped module was realized for the first time, the discrete coefficient of pulse intensity was only 0.041, the output power exceeded 142 W, the pulse width was 165 ns, and the beam quality factor M² was 1.5.
- laser oscillator,
- high repetition rate,
- acousto-optic Q-switched,
- nanosecond,
- high beam quality

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References(20)

References

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