激光二极管环形侧面抽运YAG激光器抽运光场分布研究

Pumping Light Distribution of Laser Diode Arched Side-Pumped YAG Laser

为了改善激光二极管(LD)侧面抽运固体激光器的光束质量,提高TEM00模提取效率,提出了一种LD环形阵列侧向非均匀抽运方式。采用交错放置的两个半环形LD阵列(LDA)侧向直接抽运两根串接的激光棒,非抽运面进行热传导冷却。将LD面阵发出的光做高斯光束处理,利用高斯光束通过光学系统的变换规律,通过计算机模拟,研究了LDA环形侧向非均匀抽运条件下Nd:YAG的抽运光场均匀性,分析了抽运距离、工作物质吸收参数对抽运光场分布的影响。

In order to improve the beam quality of laser diode（LD）side-pumped solid laser and increase the efficiency of mode TEM00,a ring LD arrays（LDA）non-uniform pumping mode was reported.Two crisscross semicircular LDA were used to side pumped two laser rods and were cooled by heat conduction at the other face.The optical rays from LDA were regarded as Gaussian beam approximately.With computer modeling in the conveyable regulation of Gaussian light,the pumping uniformity characteristics in crisscross semicircular LDA non-uniform side-pumped Nd：YAG laser were studied.The influences of pumping uniformity was analyzed at different distances and absorption coefficients.