基于BaGa_(4)Se_(7)晶体的中红外辐射源稳定性实验研究  

Experimental study of the stability of a mid-infrared radiation source based on BaGa_(4)Se_(7)crystals

作　　者：李楠 李惟帆[2,3,4] 祁峰 姚吉勇 郭丽媛[2,3] 路远 LI Nan;LI Wei-fan;QI Feng;YAO Ji-yong;GUO Li-yuan;LU Yuan(School of Electronic Information Engineering,Shenyang Aerospace University,Shenyang 110136,China;Key Laboratory of Liaoning Province in Terahertz Imaging and Sensing,Shenyang 110169,China;Key Laboratory of Opto-Electronic Information Processing,Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110169,China;Institutes for Robotics and Intelligent Manufacturing,Chinese Academy of Sciences,Shenyang 110169,China;Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]沈阳航空航天大学电子信息工程学院,辽宁沈阳110136 [2]辽宁省太赫兹成像感知重点实验室,辽宁沈阳110169 [3]中国科学院沈阳自动化所光电信息处理重点实验室,辽宁沈阳110069 [4]中国科学院机器人与智能制造创新研究院,辽宁沈阳110169 [5]中国科学院理化技术研究所,北京100190

出　　处：《激光与红外》2024年第5期685-691,共7页Laser & Infrared

基　　金：雄安新区科技创新专项项目(No.2022XAGG0181);辽宁省“兴辽英才”计划项目(No.XLYC2007074);中国科学院青年创新促进会资助项目(No.2023206)资助。

摘　　要：在实际应用中,光源的输出能量稳定性影响着光源在各种应用中的可靠性和性能,如激光治疗、光谱分析、光电对抗以及光成像等领域。本文首先对光学参量振荡器(OPO)系统从激光泵浦源、谐振腔结构和非线性晶体三个方面对输出能量稳定性进行分析。实验方面,使用BaGa_(4)Se_(7)(BGSe)晶体搭建脉冲激光泵浦的3~8μm中红外OPO辐射源,从激光泵浦源和OPO系统两部分对输出能量波动性进行了详细的测量和分析。当输入泵浦能量为30 mJ,正入射输出4.5μm波长时,平均能量为2.151 mJ,标准差为56.49μJ,计算RMS波动为2.62%。根据分析得出,随着激光增益的提高和腔损耗的减小,输出脉冲的波动减小。该研究为不同应用场景下BGSe晶体的红外辐射源的工作参数的选择提供了有益的指导。In practice,the output energy stability of a light source affects the reliability and performance of the light source in various applications,such as laser therapy,spectral analysis,photoelectric countermeasures,and optical imaging.In this paper,the output energy stability of the optical parametric oscillator(OPO)system is first analyzed from three aspects,laser pumping source,resonant cavity structure and nonlinear crystal.Experimentally,a pulsed laser-pumped 3~8μm mid-infrared OPO radiation source is constructed using a BaGa_(4)Se_(7)(BGSe)crystal,and the output energy fluctuation is measured and analyzed in detail from both the laser pumping source and the OPO system.When the input pump energy is 30 mJ and the positive-incidence output is 4.5μm,the average energy is 2.151 mJ with a standard deviation of 56.49μJ,and the calculated RMS fluctuation is 2.62%.According to the analysis,it is concluded that the fluctuation of the output pulse decreases with the increase of the laser gain and the decrease of the cavity loss.This study provides a useful guide for the selection of operating parameters of infrared radiation sources with BGSe crystals in different application scenarios.

关 键 词：中红外激光 BaGa 4Se 7 光参量振荡器 稳定性 方均根波动 

分 类 号：O437[机械工程—光学工程] TN248[理学—光学]