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
ACTA PHYSICA SINICA（2018）
Abstract
采用波长锁定878.9 nm激光二极管共振抽运复合Nd:YVO4激光晶体,改善热效应的同时提高抽运吸收率,分别以YVO4和BaWO4晶体作为拉曼介质,实验和理论研究了晶体性能、谐振腔结构和稳定性对内腔分体式连续波拉曼激光器性能的影响.结果表明:由于内腔分体式拉曼激光器腔长较长,谐振腔稳定性对激光器性能影响较大,选择高增益的拉曼晶体,不仅可获得高拉曼转换效率,还能一定程度上减轻热效应.而平凹腔结构中输出镜的曲率半径越小,拉曼晶体中基频光的功率密度越大,腔的动态稳定区越宽,获得的拉曼激光输出功率更高.最终以30 mm的BaWO4晶体作为拉曼介质,在抽运功率25.1 W时,获得了3.02 W的连续拉曼激光输出,光-光转换效率达到12%.
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Key words
intracavity Raman laser,continuous-wave,in-band pumping,design of laser cavity
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