从理论上分析了准三能级系统946nmNd∶YAG全固态激光器运转的条件，并比较了几种不同的倍频晶体的特性，给出内腔倍频获得473nm蓝光发射的方案。用波长808nm、输出功率为2．2W的半导体激光器泵浦Nd∶YAG，采用内腔倍频的方法，在一定的温度下，用Ⅰ类临界相位匹配BIBO晶体倍频获得了473nm26．5mW的单模连续蓝色激光输出，功率波动小于±5%。

In this paper,the authors design and build a LD end-pumped Nd∶YAG/BIBO TEM₀₀ mode blue laser. Considering the theory of Nd∶YAG 946 nm quasi-three-level laser system and Comparing the properties of BBO LBO and BIBO for frequency doubling at 946 nm,the authors present the way to realize the operation of 473 nm all-solid-state blue laser. With incident pump power of 2.2 W,output power of 26.5 mW at 473 nm can be obtained using an intra-cavity doubling crystal of BIBO. The longtime stability of the output is ±5%.