为了研究脉冲输出波长为1319nm的 Nd∶YAG激光器，通过分析Nd∶YAG激光介质的辐射跃迁能级, 采用镀制高选择性介质膜的方法抑制1064nm等其它波长的起振，最终实现1319nm激光单脉冲输出。实验中采用闪光灯抽运、水冷Nd∶YAG激光器，KD*P调Q，平平腔结构，获得1319nm激光静态输出能量340.9mJ，动态输出76.8mJ，重频1Hz，脉宽17ns，束散角2.7mrad。结果表明，通过镀制高选择性介质膜的方法可以实现1319nm激光调Q脉冲输出。

In order to study pulsed electro-optic Q-switched Nd∶YAG laser at 1319nm, the transition radiation energy level of Nd∶YAG crystal was analyzed. A single pulsed laser at 1319nm was acquired after restraining laser oscillator of wavelength at 1064nm through coating chosen film on the mirror. In a configuration of lamp pumped, water-cooled Nd∶YAG with KD*P as electro-optic Q-switched, pulsed output static energy of 340.9mJ at 1319nm, Q-switched output energy of 768mJ with pulsed-width of 17ns and divergence of 2.7mrad were acquired. Experimental results show that coating chosen-film can be used to obtain laser at 1319nm.