0.53μm全固态激光器热效应及其补偿技术研究

发布时间：2018-04-21 11:20

本文选题：全固态激光 + 双波长复合输出　；参考：《红外与激光工程》2017年04期

【摘要】：基于0.53μm、1.06μm激光双波长复合输出技术在军事上的应用前景,针对光电对抗双波长复合输出激光器的热效应,利用泊松热传导理论,考虑晶体与外界的热交换,建立了更精确的边界条件,仿真分析了三向泵浦、内腔倍频情况下激光晶体热透镜效应和倍频晶体热致相位失配的形成过程,分析讨论了平凸腔补偿热透镜效应的有效性和一般规律。通过实验探究了热效应对双波长复合激光光束质量的影响,验证了平凸腔对热效应的补偿效果,发现平凸腔能增大基模模体积,抑制高阶模增益,改善复合激光光束质量,热效应补偿效果会随着补偿平凸镜曲率半径的减小而增强。
[Abstract]:Based on the prospect of military application of 0.53 渭 m 1.06 渭 m laser double wavelength compound output technology, aiming at the thermal effect of optoelectronic counterwork double wavelength compound output laser, using Poisson's heat conduction theory, the heat exchange between crystal and the outside world is considered. A more accurate boundary condition is established and the thermal lens effect of laser crystal and the formation process of thermal phase mismatch of frequency doubling crystal are simulated and analyzed under the condition of three-direction pumping and intracavity doubling. The effectiveness and general law of compensating thermal lens effect with flat convex cavity are analyzed and discussed. The effect of thermal effect on the beam quality of dual-wavelength composite laser is investigated experimentally, and the compensation effect of flat convex cavity on thermal effect is verified. It is found that flat convex cavity can increase the volume of fundamental mode, suppress the gain of higher-order mode, and improve the quality of composite laser beam. The effect of thermal compensation will be enhanced with the decrease of curvature radius.
【作者单位】：脉冲功率激光技术国家重点实验室(电子工程学院);
【分类号】：TN248

【相似文献】