温度调谐ZnGeP<sub>2</sub>长波红外光参量振荡器

田俊涛; 李辉; 赵莉莉; 李志永; 王海; 刘松阳; 许文宁; 白进周; 谭荣清

doi:10.37188/CO.2022-0217

温度调谐ZnGeP₂长波红外光参量振荡器

doi: 10.37188/CO.2022-0217

田俊涛^{1, 2,},
李辉¹,
赵莉莉^{1, 2},
李志永^{1, 2},
王海^{1, 2},
刘松阳^{1, 2},
许文宁^{1, 2},
白进周^{1, 2},
谭荣清^{1, 2, ,}

1.
中国科学院空天信息创新研究院激光工程中心, 北京 100094
2.
中国科学院大学电子电气与通信工程学院, 北京 100049

基金项目: 国家自然科学基金（No. 61875198，No. 61775212）；脉冲功率激光技术国家重点实验室开放基金（No. SKL2021KF04）；中国科学院仪器设备研制项目（No. YJKYYQ20210045）

详细信息

作者简介:
田俊涛（1993—），男，河南周口人，博士研究生，2018年于中国石油大学（北京）获得学士学位，主要从事可调谐长波红外固体激光器方面的研究。E-mail：tianjuntao518@163.com

谭荣清（1966—），男，辽宁辽阳人，博士，研究员，博士生导师，1988年于北京大学获得物理学学士学位，1991年、2001年于中国科学院电子学研究所获得工学硕士、博士学位，现任中国科学院空天信息创新研究院研究员, 主要从事激光器和激光技术及应用方面的研究。E-mail：rqtan@mail.ie.ac.cn

中图分类号: TN248.1
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出版历程
- 收稿日期: 2022-10-18
- 修回日期: 2022-11-14
- 录用日期: 2022-12-12
- 网络出版日期: 2023-03-08

Tunable long-wave infrared optical parametric oscillator based on temperature-adjustable ZnGeP₂

TIAN Jun-tao^{1, 2
,},
LI Hui¹,
ZHAO Li-li^{1, 2},
LI Zhi-yong^{1, 2},
WANG Hai^{1, 2},
LIU Song-yang^{1, 2},
XU Wen-ning^{1, 2},
BAI Jin-zhou^{1, 2},
TAN Rong-qing^{1, 2
, ,}

1.
Laser Engineering Center, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
2.
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Funds: Supported by National Natural Science Foundation of China (No. 61875198, No. 61775212); Open Foundation of State Key Laboratory of Pulsed Power Laser Technology (No. SKL2021KF04); Scientific Instrument Developing Project of the Chinese Academy of Sciences (No. YJKYYQ20210045)

More Information

Corresponding author: rqtan@mail.ie.ac.cn

摘要

摘要:
为了获得可调谐长波红外激光输出，本文设计了一种基于ZnGeP₂（ZGP）温度调谐的长波红外光参量振荡器。采用中心波长为2097 nm的Ho:YAG激光器泵浦不同相位匹配角的ZGP晶体，通过改变晶体工作温度来研究ZnGeP₂光参量振荡器(ZGP-OPO)的温度调谐特性。在15~30 °C温度范围内，实现了7.53~8.77 μm分段可调谐长波激光输出，总调谐宽度为1.24 μm。整个调谐范围内，输出功率大于1.503 W，当闲频光波长为8.77 μm时，输出功率为1.503 W，斜率效率和光光转换效率分别为12.19%和6.53%。实验结果表明，ZGP温度调谐是实现连续可调谐长波红外激光输出的有效技术途径。本实验研究在可调谐长波固体激光器工程化领域具有潜在的应用价值。
- 温度调谐 /
- 光参量振荡器 /
- ZnGeP₂ /
- 长波
Abstract:
In order to realize tunable longwave infrared laser, we design a ZGP temperature tuned longwave infrared optical parametric oscillator. A Ho:YAG laser with the center wavelength of 2097 nm is used to pump ZGP crystals with different phase matching angles. The temperature adjustable properties of ZGP-OPO is researched by changing the operating temperature of crystal. The laser with a segment continuously tunable range of 7.53−8.77 μm is realized in the temperature range of 15−30°C, with a total tuning range of 1.24 μm. The output power of ZnGeP₂-Optical Parametric Oscillator(ZGP-OPO) is greater than 1.503 W over the entire tuning range. The output power is 1.503 W at the idler wavelength of 8.77 μm, and the corresponding slope efficiency and optical conversion efficiency are 12.19% and 6.53%, respectively. The experimental results show that temperature tuning of ZGP is an effective technical method to obtain continuously tunable long-wave infrared laser. This research has potential application value in the field of engineering of tunable long-wave laser.
- temperature tunable /
- optical parametric oscillator /
- ZnGeP₂ /
- long-wave

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图 1 ZGP-OPO实验装置图

Figure 1. Experimental setup for ZGP-OPO

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图 2 不同匹配角θ下计算的波长调谐曲线和测量的波长。（a） θ=51.3；（b） θ=51.0；（c） θ=50.6

Figure 2. Calculated wavelength tuning curves and measured wavelengths at different matching angles. (a) θ=51.3; (b) θ=51.0; (c) θ=50.6

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图 3 不同匹配角和温度下的输出功率

Figure 3. Output powers at different matching angles and temperatures

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图 4 闲频光8.77 μm的光束质量和光斑

Figure 4. Beam quality and spot of idler at the wavelength of 8.77 μm

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图 5 闲频光8.77 μm的输出特性。（a）输出功率和脉冲波形的关系；（b）功率不稳定度

Figure 5. Output characteristics of idler with the wavelength of 8.77 μm. (a) Relationship between output power and pulse waveform; (b) power instability

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图 6 测量的ZGP-OPO闲频光光谱图

Figure 6. Measured ZGP-OPO idler spectrum

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表 1 Sellmeier方程中的各参数值

Table 1. Parameter values in Sellmeier equations

Parameter	Value
Parameter	n_e	n_o
A(T)	5.23-6.4345×10⁻⁴T +1.8373×10⁻⁶T ² −4.9464×10⁻⁹T ³	4.4011+7.948×10⁻⁵T +2.0697×10⁻⁶T ² −6.3256×10⁻⁹T ³
B(T)	4.5037+1.2308×10⁻³T −9.7765×10⁻⁷T ² +4.6323×10⁻⁹T ³	5.1168+4.0214×10⁻⁴T −1.0452×10⁻⁶T ² +5.8067×10⁻⁹T ³
c	0.15503	0.134894
d	1.56991	1.31394
f	706.750	603.937

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