Author Affiliations
Abstract
College of Physics Science and Technology, Institute of Applied Photonic Technology, Yangzhou University, Yangzhou 225002, China
A continuous-wave Nd:YVO4/BaWO4 Raman laser generating simultaneous multi-wavelength first-Stokes and second-Stokes emissions is demonstrated for the first time, to the best of our knowledge. Investigations concerning different pump spot sizes and crystal lengths were conducted to improve the thermal effect and pump absorption. Three first-Stokes lasers at 1103.6, 1175.9, and 1180.7 nm and two second-Stokes lasers at 1145.7 and 1228.9 nm are obtained simultaneously using the Raman shifts of 925 cm-1 and 332 cm-1 in BaWO4 and 890 cm-1 in YVO4. At the incident pump power of 23.1 W, 1.24 W maximum Raman output power is achieved, corresponding to an optical conversion efficiency of 5.4%. We also present a theoretical analysis of the competition between different Stokes lines.
multi-wavelength intracavity Raman laser continuous wave in-band pumping Chinese Optics Letters
2020, 18(11): 111401
长春理工大学理学院吉林省固体激光技术与应用重点实验室，吉林 长春 130022
腔内倍频拉曼激光器是获得黄光激光光源的重要途径，目前尚未有直接的表达式描述连续腔内倍频激光器的功率输出对抽运和激光器参数的依赖关系。以速率方程为基础，对腔内倍频连续拉曼激光器的理论模型进行归一化处理，得到平面波近似下连续腔内倍频拉曼激光器的归一化速率方程组。对此方程组进行求解，得到描述激光器输出的表达式各变量以及参量与输出变量之间的归一化表达式，根据表达式获得了描述激光器运行的理论曲线。
连续拉曼激光器 内腔式拉曼激光器 黄光激光器 速率方程组 归一化方程组 CW Raman laser intracavity Raman laser yellow laser rate equations normalized equations
山东大学信息科学与工程学院, 山东 济南 250100
研究了激光二极管(LD)端面抽运的主动调Q内腔式Nd∶YAG/GdVO4拉曼激光器的激光特性, 测量了不同抽运功率和脉冲重复频率条件下的平均输出功率和脉冲宽度。当注入的抽运功率为7.44 W, 脉冲重复频率为20 kHz时获得的1174.5 nm拉曼光的最大平均输出功率为1.3 W, 对应的光-光转换效率为17.4%; 当注入抽运功率为6.8 W, 脉冲重复频率为15 kHz时获得的1174.5 nm拉曼光的最大单脉冲能量为74.4 μJ。与Nd∶GdVO4自拉曼激光器进行实验比较和分析, 实验结果表明主动调Q内腔式Nd∶YAG/GdVO4拉曼激光器可以获得比Nd∶GdVO4自拉曼激光器更高的平均输出功率和转换效率。
激光器 内腔拉曼激光器 受激拉曼散射 GdVO4晶体 主动调Q
