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 single-frequency fiber laser is introduced emphatically. Simultaneously, the development of blue-green single-frequency laser technology is prospected.