Experimental Investigation of Double-End Pumped Tm, Ho: GdVO<sub>4</sub> Laser at Cryogenic Temperature

Yanqiu Du; Tongyu Dai; Hui Sun; Hui Kang; Hongyang Xia; Jiaqi Tian; Xia Chen; Baoquan Yao

doi:10.3390/cryst11070798

Crystals (Jul 2021)

Experimental Investigation of Double-End Pumped Tm, Ho: GdVO<sub>4</sub> Laser at Cryogenic Temperature

Yanqiu Du,
Tongyu Dai,
Hui Sun,
Hui Kang,
Hongyang Xia,
Jiaqi Tian,
Xia Chen,
Baoquan Yao

Affiliations

Yanqiu Du: Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China
Tongyu Dai: National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China
Hui Sun: School of Electric and Information Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Hui Kang: School of Electric and Information Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Hongyang Xia: School of Electric and Information Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Jiaqi Tian: School of Electric and Information Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Xia Chen: School of Electric and Information Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Baoquan Yao: National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150001, China

DOI: https://doi.org/10.3390/cryst11070798
Journal volume & issue: Vol. 11, no. 7
p. 798

Abstract

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We describe comparatively cryogenically cooled Tm, Ho: GdVO4 lasers with an emission wavelength of 2.05 μm under continuous wave and pulse operating mode. By varying the transmittance of output couplers to be 0.40 for a continuous wave laser, the maximum output power of 7.4 W was generated with a slope efficiency of 43.3% when the absorbed pump power was increased to 18.7 W. For passively Q-switched lasers, the output characteristics were researched through altering pump mode radius. When the pump mode radius focused into the Tm, Ho: GdVO4 center equaled near 600 μm, the peak power was increased to be the maximum value of 9.9 kW at the absorbed pump power of 11.8 W. The pulse energy of 0.39 mJ was achieved at the same absorbed pump power with repetition of 5.7 kHz.

Published in Crystals

ISSN: 2073-4352 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Crystallography
Website: http://www.mdpi.com/journal/crystals/

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