高功率Ho:YAG激光器及其泵浦的磷锗锌、硒镓钡和硒化镉中长波红外非线性光学频率转换研究进展  

Research Progress of High-Power Ho:YAG Lasers and Its Application for Pumping Mid-Far-Infrared Nonlinear Frequency Conversion in ZGP, BGSe and CdSe Crystals

作　　者：姚宝权[1] 杨科 密淑一 李俊辉 魏迪生 唐锦文 陈龙 华笑笑 杨超 段小明[1] 戴通宇 鞠有伦[1] 王月珠[1] Yao Baoquan;Yang Ke;Mi Shuyi;Li Junhui;Wei Disheng;Tang Jinwen;Chen Long;Hua Xiaoxiao;Yang Chao;Duan Xiaoming;Dai Tongyu;Ju Youlun;Wang Yuezhu(National Key Laboratory of Tunable Laser Technology,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China)

机构地区：[1]哈尔滨工业大学可调谐(气体)激光技术国家级重点实验室,黑龙江哈尔滨150001

出　　处：《中国激光》2022年第1期25-38,共14页Chinese Journal of Lasers

摘　　要：2μm、中波红外(3~5μm)和长波红外(8~12μm)波段位于大气传输窗口和人眼安全范围内,涵盖众多气体原子和分子的共振吸收峰,在光谱学、遥感、通信、地球大气环境监测和光电对抗等领域具有重要的应用价值。目前,获取中长波红外波段激光的方法分为线性和非线性两种。首先分析了两种方法在中长波红外激光领域的国内外最新研究进展。之后详细地介绍了哈尔滨工业大学可调谐(气体)激光技术国家级重点实验室在非线性光学频率转换领域近三年取得的研究成果,包含Ho∶YAG调Q激光器及其泵浦的磷锗锌(ZnGeP_(2),ZGP)、硒镓钡(BaGa_(4)Se_(7),BGSe)和硒化镉(CdSe)三种非线性晶体在中长波红外非线性光学频率转换器中的应用。相信随着2μm超短脉冲激光器的发展,高功率超短脉冲中长波红外激光技术会成为未来的研究热点。Significance The 2μm,mid-infrared(MIR,3-5μm)and far-infrared(FIR,8-12μm)bands are located in the atmospheric transmission windows and the safety ranges of human eyes.At the same time,the vibration absorption spectral peaks of many gas atoms and molecules are also located in this band.Therefore,these three bands have important application value in the fields of spectroscopy,remote sensing,communications,earth atmosphere monitoring,and optoelectronic countermeasures.At present,the methods used to obtain the mid-far infrared lasers have shown the characteristics of many types and obvious advantages and disadvantages,among which the nonlinear frequency conversion(NFC)technologies possess the advantages of relatively high average power and conversion efficiency,compact structure,and tunable wavelength.Thus,it is the best choice to achieve mid-far infrared lasers.Progress National Key Laboratory of Tunable Laser Technology in Harbin Institute of Technology has carried out researches on the NFC technologies based on the studies in high-power Ho:YAG lasers.For 2μm lasers,a Ho:YAG Q-switched laser was successfully developed with the highest average output power of 231 W and a pulse repetition rate(PRR)of 10 kHz in 2018(Figs.3-5).In order to meet the requirements of higher power mid-far infrared NFC for pump sources,the Ho:YAG Q-switched laser with the highest average output power of 312 W(Figs.6 and 7)and a PRR of 20 kHz has also been achieved as expected.In addition,the Ho:YAG Q-switched laser with the highest single pulse energy of 28 mJ and a PRR of 1 kHz has also been successfully used as a pump source for NFC(Figs.1 and 2).With the development of high-power Ho:YAG lasers,the optical NFC technology has also shined in the realization of high-power mid-far infrared lasers.First of all,the research on NFC based on zinc germanium phosphate(ZnGeP_(2),ZGP)crystals has yielded fruitful results.In 2019,through the ZGP master oscillator power amplifier(MOPA)system,the lasers at center wavelengths of 3.92μm and 4.57μm wit

关 键 词：激光光学 Ho∶YAG 中波红外激光 长波红外激光 磷锗锌 硒镓钡 硒化镉 

分 类 号：TN244[电子电信—物理电子学]