两种典型双棒串接Nd∶YAG激光器谐振腔的分析

Analysis of two typical resonators for two-rod Nd∶YAG laser

采用矩阵光学的方法对两种典型双棒串接Nd∶YAG激光器谐振腔进行了研究 ,分析了两种腔型的稳定区间和热焦距 f的关系 ,并推导出两种腔型的模体积计算公式 .在 f =0 .1 6m和 f =0 .5 0m两种情况下绘出了两种腔型的模体积与稳定区间的关系图 .结果表明 :谐振腔内棒的位置直接影响了腔的稳定范围和模体积 ,对两种典型谐振腔来说 ,等间距腔的稳定范围和模体积要大得多 ,在输入功率相同时 。

Two typical resonators for two rod Nd:YAG laser were investigated by matrix optics. The relation between stability zone and thermal lens focus f was analyzed, and the formula of mode volume for the two typical resonators was calculated. The relative figures of mode volume and stability zone were presented when f =0.16?m and f =0.50?m. It was shown that the stability zone and mode volume were affected by the position of rods. The stability zone and mode volume of equal interval resonator were larger than another resonator. And the equal interval resonator can get higher output power.