Research on temperature stability of multi-segmented Nd:YAG/Nd:GdVO4 crystals laser

Mengyao Wu; Pengfei Qu; Xiaolin Zhao; Zongzhe Li

doi:10.1117/12.3030406

3 June 2024 Research on temperature stability of multi-segmented Nd:YAG/Nd:GdVO₄ crystals laser

Mengyao Wu, Pengfei Qu, Xiaolin Zhao, Zongzhe Li

Proceedings Volume 13182, 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024); 131821J (2024) https://doi.org/10.1117/12.3030406
Event: 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024), 2024, Kunming, China

Abstract

In high-power end-pumped solid-state lasers, traditional Nd:YAG crystals are extremely susceptible to fluctuations in the temperature and wavelength of the pump source due to their narrow absorption line width, causing fluctuations in the output power of the laser. In order to reduce the sensitivity of lasers to temperature and wavelength drift of the pump source, this paper combines Nd:YAG crystals with excellent thermophysical parameters with Nd:GdVO₄ crystals with wide absorption spectrum characteristics. Through a combination of front and rear placement, the front-end Nd:YAG crystal absorbs most of the pumped energy, and the back-end Nd:GdVO₄ crystals are used to supplement absorption of the unabsorbed pumped energy. When the pump source has wavelength drift, the two crystals use complementary absorption methods to keep the absorption efficiency and output power of the laser stable, thereby reducing the effect of the temperature and wavelength drift of the pump source on the laser. Experiments have shown that when the pump power is 95.5 W, this dual crystal combination scheme can achieve absorption efficiency of more than 91.5 % within the operating temperature range of 22 ℃ to 32 ℃ of the pump source, while the stability of the output power is higher than 92.5 %.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Mengyao Wu, Pengfei Qu, Xiaolin Zhao, and Zongzhe Li "Research on temperature stability of multi-segmented Nd:YAG/Nd:GdVO₄ crystals laser", Proc. SPIE 13182, 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024), 131821J (3 June 2024); https://doi.org/10.1117/12.3030406

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KEYWORDS

Crystals

Nd:YAG lasers

Light absorption

Temperature metrology

Absorption spectrum

Laser stabilization

Emission spectrum

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