LD 端面抽运 Nd∶GGG 激光器热效应研究

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。%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.