掺铽氟化物晶体可见光激光器研究进展

Research Progress of Terbium-doped Fluoride Crystal Visible Light Laser

掺铽氟化物晶体激光器由于可直接产生覆盖500~700 nm可见光波段激光输出,相对于传统变频可见光激光器,具有结构紧凑、转换效率高等优势,因此在科学研究和工业领域具有广阔的应用前景。当前,掺铽氟化物晶体可见光激光器发展的关键在于提升激光输出功率。本文首先从掺铽氟化物晶体的基质、晶体结构及光谱特性等方面展开介绍;然后,重点分析了基于倍频的光泵浦半导体激光器(2ω-OPSL)和可见激光二极管(LD)泵浦的掺铽氟化物晶体可见光激光器在连续激光、脉冲激光和深紫外激光输出方面的发展历程;最后,分析了掺铽氟化物晶体可见光激光器当前存在的问题并展望了该激光器的发展前景。

Terbium-doped fluoride crystal lasers have broad application prospects in the fields of scientific re⁃search and industry due to their ability to directly generate laser output covering the visible wavelength band of 500-700 nm,and their advantages of compact structure and high conversion efficiency compared with the tradition⁃al frequency conversion visible light lasers.Currently,the key to the development of terbium-doped fluoride crys⁃tal visible lasers is to scale up the output power of the laser.In this paper,we firstly introduce terbium-doped fluo⁃ride crystal matrix,crystal structure,and spectral properties,and then focus on the development of terbium-doped fluoride crystal visible lasers based on frequency-doubled optically pumped semiconductor lasers(2ω-OPSLs)and visible laser diode(LD)-pumped lasers for continuous,pulsed,and deep-ultraviolet laser outputs.Finally,the current problems of terbium-doped fluoride crystal visible lasers are analyzed,and the development prospects of these lasers are analyzed.