纳秒可见光全固态拉曼激光器的研究进展

Research progress of nanosecond visible all-solid-state Raman lasers

纳秒脉冲可见波段激光在遥感、相干雷达系统、精密加工、激光清洗、液态染料激光器泵浦等领域广泛应用,全固态激光器以其结构紧凑、占用空间小、成本低、寿命长等特点备受青睐。近年来,纳秒可见光全固态激光器发展迅速,本文简述了传统激光二极管泵浦掺Nd ^(3+)、Yb ^(3+)等稀土离子晶体输出近红外光的二阶非线性频率变换产生纳秒脉冲可见光固体激光器的技术水平。从非线性频率变换角度介绍了几种出光波段丰富的纳秒脉冲可见光全固态拉曼激光器的技术特点,重点介绍了拉曼频移、拉曼混频和金刚石拉曼,对其性能特点和技术瓶颈进行了综述,并在最后做了总结和展望。

Nanosecond pulsed visible laser is widely used in remote sensing,coherent radar system,precision machining,laser cleaning,and liquid dye laser pumping and so on.All-solid-state laser is favored for its compact structure,small volume,low-cost,long life and so on.In recent years,nanosecond visible all-solid-state lasers have been developing rapidly.In this paper,the state of the art of nanosecond pulsed visible solid-state lasers generated by second-order nonlinear frequency conversion of near-infrared light output from Nd ^(3+),Yb ^(3+)and other rare-earth ion-doped crystals pumped by conventional laser diodes is briefly described.The technical characteristics of several nanosecond pulse visible all-solid-state Raman lasers with abundant outgoing wavelength bands are introduced from the perspective of nonlinear frequency conversion,focusing on Raman frequency shifting,Raman frequency mixing,and diamond Raman,with an overview of their performance characteristics and technical bottlenecks,and concluding with a summary and outlook.