物理学报2018，Vol.67Issue(2)：96-103,8.DOI:10.7498/aps.67.20171848
波长锁定878.9nm激光二极管抽运内腔式YVO4/BaWO4连续波拉曼激光器
Continuous-wave intracavity YVO4/BaWO4Raman laser pumped by a wavelength-locked 878.9 nm laser diode
摘要
Abstract
In this paper,the composite Nd:YVO4laser crystal is in-band pumped by a wavelength-locked laser diode at 878.9 nm, with the purpose of reducing thermal effects and improving pump absorption simultaneously. By using the YVO4 and BaWO4crystals as Raman media, the influences of crystal properties, resonator structure and stability on the performance of continuous-wave intracavity Raman laser are investigated experimentally and theoretically. The results show that the resonator stability greatly affects laser performance due to the long cavity length of intracavity Raman laser. By choosing the Raman medium with high Raman gain,we can not only obtain higher Raman conversion efficiency, but also reduce the thermal effect to a certain extent. Furthermore,the smaller the curvature radius of the output mirror in the plano-concave cavity structure, the greater the power density of the fundamental laser in the Raman crystal is and the wider the dynamic stability region of the resonator,and hence the higher output power of the Raman laser can be achieved. Finally,by using 30-mm BaWO4crystal as Raman medium,a highest Raman output of 3.02 W is obtained at a pump power of 25.1 W,corresponding to a diode-to-Stokes optical conversion efficiency of 12%.关键词
内腔拉曼激光/连续波/共振抽运/谐振腔结构设计Key words
intracavity Raman laser/continuous-wave/in-band pumping/design of laser cavity引用本文复制引用
张蕴川,樊莉,魏晨飞,顾晓敏,任思贤..波长锁定878.9nm激光二极管抽运内腔式YVO4/BaWO4连续波拉曼激光器[J].物理学报,2018,67(2):96-103,8.基金项目
国家自然科学基金(批准号:11774301)、江苏省自然科学基金青年科学基金(批准号:BK20130453)和南京大学固体微结构物理国家重点实验室开放课题(批准号:M29027)资助的课题. Project supported by the National Natural Science Foundation of China(Grant No. 11774301),the Natural Science Foun-dation of Jiangsu Province,China(Grant No. BK20130453),and the State Key Laboratory for Solid State Microstructures, Nanjing University, China (Grant No. M29027). （批准号:11774301）
