A 6-17 μm tunable and high-pulse-energy far-infrared laser based on a BaGa4Se7 optical parametric oscillator

doi:10.1088/1674-1056/adf82d

中国物理B ›› 2026, Vol. 35 ›› Issue (1): 14210-014210.doi: 10.1088/1674-1056/adf82d

A 6-17 μm tunable and high-pulse-energy far-infrared laser based on a BaGa₄Se₇ optical parametric oscillator

Kejun Wang(王柯君)^1,2,3, Hui Kong(孔辉)^1,2,3,†, Xiaoxia Li(李晓霞)^1,2,3,‡, Dongbo Lv(吕东博)^1,2,3,, and Peng Xie(谢鹏)^1,2,3

1 State Key Laboratory of Pulsed Power Laser Technology, College of Electronic Engineering, National University of Defense Technology, Hefei 230037, China;
2 Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China;
3 Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China

收稿日期:2025-07-01 修回日期:2025-07-24 接受日期:2025-08-06 发布日期:2025-12-30
通讯作者: Hui Kong, Xiaoxia Li E-mail:konghui17@nudt.edu.cn;Lixiaoxia17@nudt.edu.cn
基金资助:
This work was supported by Independent Innovation Science Foundation of National University of Defense Technology (Grant No. 23-ZZCX-JDZ-44).

A 6-17 μm tunable and high-pulse-energy far-infrared laser based on a BaGa₄Se₇ optical parametric oscillator

Kejun Wang(王柯君)^1,2,3, Hui Kong(孔辉)^1,2,3,†, Xiaoxia Li(李晓霞)^1,2,3,‡, Dongbo Lv(吕东博)^1,2,3,, and Peng Xie(谢鹏)^1,2,3

1 State Key Laboratory of Pulsed Power Laser Technology, College of Electronic Engineering, National University of Defense Technology, Hefei 230037, China;
2 Advanced Laser Technology Laboratory of Anhui Province, Hefei 230037, China;
3 Nanhu Laser Laboratory, National University of Defense Technology, Changsha 410073, China

Received:2025-07-01 Revised:2025-07-24 Accepted:2025-08-06 Published:2025-12-30
Contact: Hui Kong, Xiaoxia Li E-mail:konghui17@nudt.edu.cn;Lixiaoxia17@nudt.edu.cn
Supported by:
This work was supported by Independent Innovation Science Foundation of National University of Defense Technology (Grant No. 23-ZZCX-JDZ-44).

摘要/Abstract

摘要： Tunable mid-infrared and far-infrared laser output was demonstrated based on BaGa₄Se₇ crystals and an optical parametric oscillator (OPO). With a 1.06 μm Nd:YAG laser and a double-pass singly resonant OPO cavity, a laser energy output of 2.2 mJ at 10 μm was obtained. By tuning the angle and temperature, a tunable laser output covering the wavelength range from 6 μm to 17 μm was obtained with a tuning precision better than 3 nm. The corresponding optical-to-optical conversion efficiency was 2.8%, and the slope efficiency was 4.4%. The damage effect of the output laser on detectors was also investigated, and point damage to the detector occurred at an output energy of 16.4 μJ. The laser system has the advantages of miniaturization, a wide tuning range, high energy and high tuning resolution. Its broadband laser characteristics make it highly valuable for applications in atmospheric detection, infrared spectroscopy and electro-optical countermeasures.

关键词: BaGa₄Se₇, tunable laser, optical parametric oscillator, far-infrared laser

Abstract: Tunable mid-infrared and far-infrared laser output was demonstrated based on BaGa₄Se₇ crystals and an optical parametric oscillator (OPO). With a 1.06 μm Nd:YAG laser and a double-pass singly resonant OPO cavity, a laser energy output of 2.2 mJ at 10 μm was obtained. By tuning the angle and temperature, a tunable laser output covering the wavelength range from 6 μm to 17 μm was obtained with a tuning precision better than 3 nm. The corresponding optical-to-optical conversion efficiency was 2.8%, and the slope efficiency was 4.4%. The damage effect of the output laser on detectors was also investigated, and point damage to the detector occurred at an output energy of 16.4 μJ. The laser system has the advantages of miniaturization, a wide tuning range, high energy and high tuning resolution. Its broadband laser characteristics make it highly valuable for applications in atmospheric detection, infrared spectroscopy and electro-optical countermeasures.

Key words: BaGa₄Se₇, tunable laser, optical parametric oscillator, far-infrared laser

中图分类号: (Nonlinear optical crystals)

42.70.Mp

42.65.Yj (Optical parametric oscillators and amplifiers) 42.15.Eq (Optical system design)

Kejun Wang(王柯君), Hui Kong(孔辉), Xiaoxia Li(李晓霞), Dongbo Lv(吕东博), and Peng Xie(谢鹏). A 6-17 μm tunable and high-pulse-energy far-infrared laser based on a BaGa₄Se₇ optical parametric oscillator[J]. 中国物理B, 2026, 35(1): 14210-014210.

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A 6-17 μm tunable and high-pulse-energy far-infrared laser based on a BaGa₄Se₇ optical parametric oscillator

A 6-17 μm tunable and high-pulse-energy far-infrared laser based on a BaGa₄Se₇ optical parametric oscillator

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