本文报道了一种新型的LD泵浦Nd:YVO₄-KTP电光调Q绿光激光器，用单块KTP晶体同时作为电光调Q开关和Ⅱ类相位匹配的倍频晶体，减少了腔内损耗，提高了效率，得到了脉宽为12ns的绿光脉冲序列。激光器采用纵向同轴泵浦方式、独特的整体控温技术和小焦距非球面聚焦透镜，并把全部元件固化为一个整体，进一步提高了器件的效率、激光的输出功率和光束方向的稳定性。

A new type of LD pumped Nd： YV0₄- KTP Q-switched green laser is demonstrated. By using the KTP crystal as both an electro-optic Q-switcher and a frequency-doubling crystal in type II phase matching for generating pulsed green beams, low loss and high efficiency characteristics were realized. Special temperature control technique and aspherical lens with smaller focus length were used in the laser, and all elements were fixed into a whole with epoxy. These measures improved the laser efficiency, output power and laser beam direction stability. Green power with up to 762 W peak output and 12 ns pulse width was obtained.