Research on performance improvement technology of a BaGa4Se7 mid-infrared optical parametric oscillator

In this Letter, we demonstrate an average output power of 5.12 W at 3–5 µm from a type-I phase-matching BaGa4Se7 (BGSe) optical parametric oscillator (OPO), which is pumped by a 2090 nm ð',,-switched Ho:YAG laser with pulse repetition frequency of 1 kHz. At maximum output level, the correspond...

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Bibliographic Details
Published in:	Optics letters 2020-12, Vol.45 (23), p.6418-6421
Main Authors:	Yang, Ke, Liu, Gaoyou, Li, Chunxiao, Yao, Baoquan, Yao, Jiyong, Chen, Yi, Mi, Shuyi, Duan, Xiaoming, Dai, Tongyu
Format:	Article
Language:	eng
Subjects:	Horizontal orientation Infrared lasers Laser beams Optical Parametric Oscillators Parametric amplifiers Phase matching Pulse repetition frequency Q factors Semiconductor lasers Tuning YAG lasers
Online Access:	Get full text
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Summary:	In this Letter, we demonstrate an average output power of 5.12 W at 3–5 µm from a type-I phase-matching BaGa4Se7 (BGSe) optical parametric oscillator (OPO), which is pumped by a 2090 nm ð',,-switched Ho:YAG laser with pulse repetition frequency of 1 kHz. At maximum output level, the corresponding slope efficiency and optical-to-optical conversion efficiency are 30.0% and 18.3%, respectively. Moreover, under ring cavity conditions, the BGSe OPO produced a 3.04 W mid-infrared laser with high beam quality factors ð'2 of 1.47 in the horizontal direction and 1.51 in the vertical direction. Besides, the wavelength-tuning curve for type-I BGSe was also investigated, corresponding to an idler wavelength-tuning range of 4.5–5.3 µm, and the signal light wavelength was 4.5 to 4.1 µm.
ISSN:	0146-9592 1539-4794