中红外激光器研究进展

Progress of Mid-Infrared Laser

中红外波段在基础科学、生物医学、环境监测、军事国防、安检安防、通信娱乐等诸多领域都有极其重要的应用。作为中红外技术的核心组成部分,覆盖宽光谱范围、高能量、高转换效率、小型化、室温运转的高性能中红外相干辐射源始终都是科研与应用领域的研究重点与热点。目前中红外激光器种类有很多,根据不同的产生原理,中红外激光器主要分为化学激光器、气体激光器、基于稀土或过渡金属离子掺杂的激光器、量子级联半导体激光器、基于非线性频率变换的激光器。重点综述这几种激光器的特点及发展历程,并对其研究前景进行展望。

The mid-infrared band has broad applications,such as fundamental science,biomedicine,environmental testing,national defense,security,communications,and entertainment.As the core component of mid-infrared technology,a high-performance mid-infrared coherent radiation source with a wide spectral range,high energy,high conversion efficiency,miniaturization,and room-temperature operation has been a research focus in scientific research and application.There are many types of mid-infrared lasers.According to different generation principles,mid-infrared lasers are mainly divided into chemical lasers,gas lasers,and lasers based on rare earth or transition metal ion doping,quantum cascade semiconductor lasers,and lasers based on nonlinear frequency conversion.This paper focuses on the characteristics and development of these lasers and discusses their research prospects.