摘要
连续波可调谐中红外相干光源在光谱分析、传感与探测等领域具有重要的应用价值。基于准相位匹配(QPM)的差频产生(DFG)技术是获取高效中红外激光输出的有效途径,其具有结构简单、调谐方便、室温运转和无阈值限制等优点。本文介绍了连续波中红外差频产生激光光源的基本原理及在高转换效率、宽带调谐、多波长运转和系统小型化方面的国内外研究进展,并对多种典型DFG激光系统的设计方案、技术特点和输出性能展开讨论,最后对连续波中红外DFG激光光源的发展前景进行了展望。
Continuous-wave tunable coherent light source in the mid-infrared region is valuable for spectrum analysis,sensing and detection,etc. Optical difference frequency generation( DFG) based on quasi-phase matching( QPM)technique is a useful way to achieve mid-IR laser emissions,which has many advantages such as simple structure,convenient tuning,room-temperature operation,and non-threshold limits. In this paper,the basic principle of DFG technique is firstly introduced,and then the research progress on high conversion efficiency,broadband tuning,multiwavelength operation and system miniaturization are dicussed in detail. The design schemes,technical characteristics and output performances of some typical mid-IR laser systems are illustrated and analyzed emphatically. Finally,the development prospects of the continuous-wave mid-infrared DFG laser source is forecast.
出处
《激光杂志》
北大核心
2015年第12期8-13,共6页
Laser Journal
基金
国家自然科学基金(11374161)
江苏省信息与通信工程优势学科
2014年度大学生创新创业训练计划资助项目
关键词
非线性光学
中红外激光
差频产生
周期性极化晶体
准相位匹配
nonlinear optics
mid-infrared laser
difference frequency generation
periodically poled crystal
quasi phase matching
