大功率部分端面抽运混合腔板条激光器  

High Power Partially End-Pumped Slab Laser with Hybrid Resonator

作　　者：石鹏[1] 李代军 张恒利 杜可明 

机构地区：[1]中国科学院上海光学精密机械研究所,上海201800 [2]Edge Wave GmbH

出　　处：《光学学报》2004年第4期491-494,共4页Acta Optica Sinica

摘　　要：在半导体抽运的全固态激光器中 ,激光晶体上的热畸变限制了激光器在大功率下输出时保持高光束质量的能力。板条结构的固体激光器具有优异的散热能力 ,再配合部分端面抽运以及稳非稳柱面混合腔的使用 ,使大功率高光束质量的激光输出成为可能。在德国EdgeWaveGmbH进行的对这一技术的合作研究中 ,利用不到10 0mm的腔长 ,在Nd∶YVO4板条激光器上获得了 110W近衍射极限的 1.0 6 μm连续激光输出 ,这时在非稳腔方向上的光束传播因子M2 为 1.3,在稳腔方向上为 1.5。通过对输出激光进行空间滤波切除腔镜造成的衍射旁瓣后 ,5 0W输出时M2 的典型值在非稳腔和稳腔方向上分别为 1.0 9和 1.2。In laser diode-pumped solid-state lasers, the thermal induced distortion in laser crystal limits the scalability of high power output with high beam quality. Partially end-pumped slab laser with a stable-unstable hybrid resonator is an effective way to solve this problem. 110 W output with nearly diffractive-limit is obtained using Nd∶YVO 4 as the gain media and a cavity less than 100 mm. The beam propagation factor M 2 are 1.3 and 1.5 in the unstable and stable directions respectively at this power level. Spatial filting to cut the side lobes casued by hard-edge difrraction of output resonator mirror is also demonstrated. The typical propagation factors M 2 are 1.09 and 1.2 after a spatial filter at 50 W operation.

关 键 词：应用光学 二极管抽运固体激光器 板条激光器 端面抽运 光束质量 钕掺杂 钒酸钇晶体 

分 类 号：TN248.1[电子电信—物理电子学]