蓝绿光单频激光器研究进展

Research Progress of Blue-Green Single-FrequencyLaser

蓝绿光波段激光在激光显示、医疗诊断、光学数据存储以及水下通信等方面有着广阔的应用前景。尤其是蓝绿光单频激光具有较高的相干性,可广泛应用于高分辨率光谱、原子冷却和俘获、量子光学等领域,吸引了国内外学者的极大关注,发展十分迅速。本文介绍了实现蓝绿光单频激光的几种关键技术--二次谐波产生(SHG)手段获得蓝绿光单频激光、半导体材料直接激射产生蓝绿光单频激光等,总结了蓝绿光单频激光器的研究现状和发展方向。此外,结合本课题组在光纤基蓝绿光单频激光器方面的研究工作,着重介绍了基于近红外短波单频光纤激光器通过SHG手段获得蓝绿光单频激光的研究进展,并对蓝绿光单频激光技术的发展进行了展望。

Blue-green lasers have a broad application prospect in laser display,medical diagnosis,optical data storage,and underwater communication.In particular,the blue-green single-frequency laser has high coherence and can be used in fields such as high-resolution spectroscopy,atomic cooling/capture,and quantum optics,which have attracted extensive attention of scholars at home and abroad and developed rapidly.In this paper,several key technologies of realizing blue-green single-frequency lasers are introduced,such as second harmonic generation(SHG)to obtain blue-green single-frequency lasers,and directly lasing from semiconductor materials.The research status and development direction of the blue-green single-frequency laser are summarized.In addition,according to the research work of our group in the fiber-based blue-green single-frequency laser,the research progress of obtaining blue-green single-frequency lasers through SHG technology based on near-infrared shortwave singlefrequency fiber laser is introduced emphatically.Simultaneously,the development of blue-green single-frequency laser technology is prospected.