LD连续和脉冲抽运的Nd：YAG腔内倍频蓝光激光器

在激光二极管连续抽运的Nd：YAG激光器中,分别采用BIBO和LBO晶体对946nm激光进行腔内倍频,获得473 nm蓝光输出。抽运功率9.5 W时,BIBO晶体倍频输出功率为508mW,转换效率5.35%：LBO晶体倍频输出功率为441 mW,转换效率4.64%。LBO倍频的转换效率小于BIBO,但输出蓝光的光束空间质量较好。在LD脉冲抽运和LBO晶体腔内倍频的Nd：YAG激光器中,研究了抽运脉冲的调制频率和占空比与蓝光输出功率的关系。当抽运功率9W,脉冲调制频率100Hz、占空比60%时,得到最大的蓝光输出功率465mW,比相同功率连续抽运提高87mW。结果表明,LD脉冲抽运能有效降低Nd：YAG晶体的热效应影响,提高激光器输出功率。

Intra-cavity frequency doubling Nd:YAG blue laser pumped by continuous and pulsed LD

The 473 nm blue laser was generated from a continuous LD pumped Nd:YAG laser with intra-cavity frequency doubling by using BIBO and LBO crystals.Under pump power of 9.5 W,output powers of the blue laser with BIBO and LBO intra-cavity frequency doubling were 508 mW and 441 mW,and conversion efficiencies were 5.35% and 4.64%,respectively.The conversion efficiency of LBO frequency doubling was smaller than that of BIBO,but LBO produced blue laser of the better beam quality.In a pulsed LD pumped Nd:YAG laser wi...