A compact and efficient 4.25 μm BaGa<sub>4</sub>Se<sub>7</sub> optical parametric oscillator

Minqiang Kang; Ying Deng; Xiongwei Yan; Xiaoming Zeng; Yangwu Guo; Jiyong Yao; Fa Zeng; Jiangang Zheng; Kainan Zhou; Chongbing Qu; Jingqin Su; Qihua Zhu

doi:doi:10.3788/COL201917.121402

Chinese Optics Letters, 2019, 17 (12): 121402, Published Online: Oct. 8, 2019

A compact and efficient 4.25 μm BaGa₄Se₇ optical parametric oscillator Download： 700次

Minqiang Kang ¹Ying Deng ^1,2,3Xiongwei Yan ¹Xiaoming Zeng ^1,2,3Yangwu Guo ⁴Jiyong Yao ^4,*Fa Zeng ¹Jiangang Zheng ^1,2,3Kainan Zhou ^1,2,3Chongbing Qu ⁵Jingqin Su ^1,2,3Qihua Zhu ^1,2,3,**

Author Affiliations

¹ Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

² Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China

³ Science and Technology on Plasma Physics Laboratory, Mianyang 621900, China

⁴ Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China

⁵ Graduate School of China Academy of Engineering Physics, Beijing 100088, China

140.3070 Infrared and far-infrared lasers 190.4970 Parametric oscillators and amplifiers

Abstract

We report an efficient mid-infrared extracavity optical parametric oscillator (OPO) based on the nonlinear crystal BaGa₄Se₇ pumped by a diode-side-pumped Q-switched Nd:Y₃Al₅O₁₂ (Nd:YAG) laser. The maximum pulse energy of 1.03 mJ at 4.25 μm is obtained with the repetition rate of 10 Hz and pulse width of 12.6 ns when the pump energy was 13.5 mJ, corresponding to an optical-to-optical conversion efficiency of 7.6% from 1.064 μm to 4.25 μm. The idler wave slope conversion efficiency was 12%. To the best of our knowledge, it is the highest reported conversion efficiency for the compact BaGa₄Se₇ OPO driven by the Nd:YAG laser.

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Minqiang Kang, Ying Deng, Xiongwei Yan, Xiaoming Zeng, Yangwu Guo, Jiyong Yao, Fa Zeng, Jiangang Zheng, Kainan Zhou, Chongbing Qu, Jingqin Su, Qihua Zhu. A compact and efficient 4.25 μm BaGa₄Se₇ optical parametric oscillator[J]. Chinese Optics Letters, 2019, 17(12): 121402.

A compact and efficient 4.25 μm BaGa₄Se₇ optical parametric oscillator Download： 700次

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