LD端面抽运Nd：GGG激光器热效应研究

Thermal effect of LD end-pumped Nd：GGG laser

摘要: 为了研究激光二极管端面抽运掺钕钆镓石榴石Nd：GGG激光器的热效应，采用实验测量与理论计算结合的方法，进行了激光器的连续运转，测量了激光器的热焦距、本征损耗和热损耗。结果表明，采用凹-平腔结构，当抽运功率为28.8W时，得到最大连续波输出功率为13.2W，对应最大斜效率为51.5%，光光转换效率为49.5%，Nd：GGG晶体的本征损耗测量值为0.86%/cm；测量结果与理论计算吻合得很好。所得结果为LD抽运Nd：GGG激光器的进一步设计优化提供了实验和理论依据。

Abstract: In order to study the thermal effect of LD end-pumped Nd:GGG laser, the thermal focal length, intrinsic loss and thermal loss were measured with the laser operating continuously. The results show the maximal output power of 13.2W, the maximal slope efficiency of 51.5% and the optical conversion efficiency of 49.5% were obtained in a plano-concave cavity when the pump power was 28.8W. The intrinsic loss of Nd:GGG crystal was 0.86%/cm. The result was in good agreement with the theoretically calculation. The results can offer experimental and theoretical basis for the further optimizaiton of LD pumped Nd:GGG laser.