光学超晶格中红外光参量振荡器研究进展  

Recent Progress of Optical-Superlattice-Based Mid-Infrared Optical Parametric Oscillators

作　　者：聂鸿坤 宁建 张百涛[1] 杨克建[1] 赵刚[2] 吕新杰[2] 何京良[1] Nie Hongkun;Ning Jian;Zhang Baitao;Yang Kejian;Zhao Gang;Lü Xinjie;He Jingliang(State Key Laboratory of Crystal Materials,Institute of Novel Semiconductors,Shandong University,Jinan,Shandong 250100,China;National Laboratory of Solid State Microstructures,Nanjing University,Nanjing,Jiangsu 210093,China)

机构地区：[1]山东大学新一代半导体材料研究院晶体材料国家重点实验室,山东济南250100 [2]南京大学固体微结构物理国家重点实验室,江苏南京210093

出　　处：《中国激光》2021年第5期119-146,共28页Chinese Journal of Lasers

基　　金：国家重点研发计划(2017YFB0405204);国家重大科学仪器设备开发专项(2011YQ030127)。

摘　　要：基于光学超晶格的光参量振荡技术是研制2~5μm波段中红外相干光源的有效技术手段,在遥感探测、精密测量、环境监测、医疗诊断、科学研究和军事国防等领域具有非常重要的应用价值。总结了光学超晶格2~5μm中红外光参量振荡器的国内外研究进展,重点分析了连续波、纳秒脉冲以及皮秒脉冲等不同运转模式下光参量振荡器的结构特点、优势和发展前景。并对光学超晶格中红外光参量振荡器的发展趋势进行了展望,指出高功率、宽调谐、低功耗、小型化和轻量化是光学超晶格光参量振荡器的重要发展方向,而高质量大尺寸(厚度)的光学超晶格晶体、性能优异的泵浦源和可靠的工程化样机设计是未来光参量振荡器发展的核心技术。Significance A 2--5μm mid-infrared(MIR)laser has a broad application prospect and plays a significant role in applications such as remote sensing detection,atmospheric environmental monitoring,medical diagnosis,precision measurement,and photoelectric countermeasures.It covers the so-called"atmospheric window area",that is,a transmission window with the maximum atmospheric transmittance.It has a strong penetrating ability for fog,smoke,and dust.Moreover,it has been widely used in the field of free-space optical communications.The spectral response range of infrared-guided missile detectors used in military applications is in the 2--5μm band.As the applications of infrared detectors increase,the development of the corresponding interference technologies increases.A laser light source with a 2--5μm band for photoelectric countermeasures against infrared seekers is urgently needed.The 2--5μm band is also called the"molecular fingerprint area",which covers most gas molecular absorption spectra.It finds important applications in the fields of air pollution monitoring,trace gas detection,precision spectral analysis,and molecular biomedicine.In addition,a 2--5μm ultrastrong and ultrashort MIR laser can generate high-order harmonics,high-contrast attosecond light pulses,MIR frequency combs,and realize high brightness.It can also be used as an optical parametric oscillator(OPO)pump source for obtaining a 6--8μm or even longer wavelength MIR laser.Therefore,because of the important application background and huge market demand of 2--5μm MIR lasers,they have always been a desired topic of research in the field of all-solid-state laser technology.Periodically-polarized optical superlattice crystals mainly consist of periodically-polarized lithium niobate(PPLN),periodically-polarized lithium tantalate,and periodically-polarized KTP.They possess the advantages of a large nonlinear coefficient,a wide tuning range,diversified wavelength tuning methods,and a compact structure.When applied to a MIR OPO,they can realize wide

关 键 词：激光光学 光学超晶格晶体 光参量振荡器 中红外激光 

分 类 号：O437.4[机械工程—光学工程]