折返式激光二极管侧抽运Nd:YAG激光器  

Diode Side-Pumped Enfolded Cavity Nd∶YAG Lasers

作　　者：侯霞[1] 陆雨田[1] 胡企铨[1] 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光学学报》2004年第10期1349-1352,共4页Acta Optica Sinica

摘　　要：提出一种明显改善激光二极管侧面直接抽运固体激光器输出光束质量的新型谐振腔———折返式谐振腔 ,它由三部分组成 :直角棱镜、全反的腔镜以及耦合输出腔镜 ,采用振荡光顺次通过晶体内增益场强区的工作方式。它重叠利用不均匀增益场的对称强区 ,提高了晶体增益场和谐振腔基模的重叠度 ,达到改善器件输出光束质量和提高效率的目的。通过对受抽运晶体内的增益场分布及腔内振荡光的模拟分析以及实验测试 ,验证了这种谐振腔的优势。在此基础上 ,研制了采用准连续线阵列激光二极管抽运Nd∶YAG的折返式激光器。研究比较了在不同类型谐振腔下 ,激光器的输出特性。例如 :平平直腔和平平折返腔在耦合透过率为 5 0 %时的输出特性 ,其增益场和基模的重叠度由 2 4 %提高到 5 3% ,光光斜效率由的 2 0 2 %提高到 2 7 3%。A novel cavity for improving the beam quality of diode direct side-pumped Nd∶YAG laser was proposed. The enfolded cavity consisted of three parts, a Porro prism, a high-reflectance mirror and a output coupler mirror. It made full use of the symmetry proportion of uneven gain profile to provide better matching between the gain volume and mode volume, so that the better quality beam and the higher optical-optical slope efficiency were obtained. The enfolded cavity was proved to be high effective by the results of experimentation and simulated calculation. For the quasi-CW laser diode side-pumped enfolded Nd∶YAG laser, a 27.3% optical-optical slope efficiency was obtained.

关 键 词：激光器 谐振腔 折返式 侧抽运 直角棱镜 

分 类 号：TN298.13[电子电信—物理电子学]