24-W cryogenically cooled Nd:YAG monolithic 946-nm laser with a slope efficiency >70%

C. Y. Cho; C. Y. Lee; C. C. Chang; P. H. Tuan; Kai-Feng Huang; Yung-Fu Chen

doi:10.1364/OE.23.010126

24-W cryogenically cooled Nd:YAG monolithic 946-nm laser with a slope efficiency >70%

C. Y. Cho, C. Y. Lee, C. C. Chang, P. H. Tuan, Kai-Feng Huang, Yung-Fu Chen

Department of Electrophysics

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

A high-power efficient monolithic Nd:YAG 946-nm laser is demonstrated at the cryogenic temperature. By exploring the absorption and the fluorescence spectra of the Nd:YAG crystal, it reveals the fact that the absorption bandwidth at 808 nm is narrowing and the fluorescence intensity at 1061 nm is significant enhanced when the temperature is decreased. The temperature dependence of the lasing threshold at 946 nm is found to display a minimum value near a temperature of 170 K. At an incident pump power of 34.5 W, the local heating leads the optimum temperature to be approximately 120 K and the maximum output power can reach 24.4 W with the conversion efficiency of 71% as well as the slope efficiency up to 75%.

Original language	English
Pages (from-to)	10126-10131
Number of pages	6
Journal	Optics Express
Volume	23
Issue number	8
DOIs	https://doi.org/10.1364/OE.23.010126
State	Published - 1 Jan 2015

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abstract = "A high-power efficient monolithic Nd:YAG 946-nm laser is demonstrated at the cryogenic temperature. By exploring the absorption and the fluorescence spectra of the Nd:YAG crystal, it reveals the fact that the absorption bandwidth at 808 nm is narrowing and the fluorescence intensity at 1061 nm is significant enhanced when the temperature is decreased. The temperature dependence of the lasing threshold at 946 nm is found to display a minimum value near a temperature of 170 K. At an incident pump power of 34.5 W, the local heating leads the optimum temperature to be approximately 120 K and the maximum output power can reach 24.4 W with the conversion efficiency of 71% as well as the slope efficiency up to 75%.",

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AU - Cho, C. Y.

AU - Lee, C. Y.

AU - Chang, C. C.

AU - Tuan, P. H.

AU - Huang, Kai-Feng

AU - Chen, Yung-Fu

PY - 2015/1/1

Y1 - 2015/1/1

N2 - A high-power efficient monolithic Nd:YAG 946-nm laser is demonstrated at the cryogenic temperature. By exploring the absorption and the fluorescence spectra of the Nd:YAG crystal, it reveals the fact that the absorption bandwidth at 808 nm is narrowing and the fluorescence intensity at 1061 nm is significant enhanced when the temperature is decreased. The temperature dependence of the lasing threshold at 946 nm is found to display a minimum value near a temperature of 170 K. At an incident pump power of 34.5 W, the local heating leads the optimum temperature to be approximately 120 K and the maximum output power can reach 24.4 W with the conversion efficiency of 71% as well as the slope efficiency up to 75%.

AB - A high-power efficient monolithic Nd:YAG 946-nm laser is demonstrated at the cryogenic temperature. By exploring the absorption and the fluorescence spectra of the Nd:YAG crystal, it reveals the fact that the absorption bandwidth at 808 nm is narrowing and the fluorescence intensity at 1061 nm is significant enhanced when the temperature is decreased. The temperature dependence of the lasing threshold at 946 nm is found to display a minimum value near a temperature of 170 K. At an incident pump power of 34.5 W, the local heating leads the optimum temperature to be approximately 120 K and the maximum output power can reach 24.4 W with the conversion efficiency of 71% as well as the slope efficiency up to 75%.

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24-W cryogenically cooled Nd:YAG monolithic 946-nm laser with a slope efficiency >70%

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