设计了激光二极管(LD)双端面抽运传导冷却复合Nd:YAG晶体电光调Q激光器，实现脉冲间隔可调的双Q脉冲输出。用两个光纤耦合输出的LD模块作为抽运源，偏硼酸钡(BBO)晶体作为Q开关，在一个抽运周期内两次启动Q开关，获得脉冲能量大于14 mJ，脉宽小于等于18 ns，脉冲间隔200~230 μs可调的双Q脉冲输出，激光器重复频率50 Hz，光光转换效率达到24%。探索了用磷酸二氘钾(KD*P)调Q晶体开关实现稳定双脉冲输出的可行性，通过抑制压电环效应，消除子脉冲现象，最终获得脉冲能量约11 mJ，脉宽小于等于18 ns。

A laser diode (LD) dual-end pumped, conductively cooled, electro-optical Q-switched composite Nd:YAG laser is designed. Double-pulse laser output with adjustable pulse interval is achieved. By using two fiber-coupled LD modules as the pumping source, β-BaB2O4 (BBO) crystal as the Q-switch, double-pulse laser output is acquired by opening the Q-switch twice in a pumping cycle time, and the laser is capable of producing two Q-switched 1064 nm pulses with the single pulse energy more than 14 mJ, 18 ns, the interval between the two pulses is adjustable from 200 μs to 230 μs at the repetition of 50 Hz, the optical-to-optical efficiency reaches 24%. Furthermore, we explore the feasibility of stable double-pulse laser output by using the Q-switched crystal KD2PO4 (KD*P), and suppressing the piezoelectric ring effect of KD*P, the sub-pulse phenomenon is removed and double-pulse laser output with 11 mJ, 18 ns, is obtained.