为了实现转镜的高转速、连续可调以及高度稳定性,对转镜Q开关的高速电机及其驱动控制系统进行了设计。采用AVR单片机、栅极驱动集成模块和IGBT设计了控制高速电机的变频驱动系统。实验结果表明:所设计的高速电机转速<60.8 kr/min时,驱动系统可平稳转动且无抖动现象,而且还能实现转镜Q开关的快速关断。将设计的棱镜转镜Q开关应用于二极管泵浦固态激光器(DPSSL)中,在转速为43 kr/min时,实现了具有14 kHz高重复频率大功率快速关断能力的Q开关技术,获得了小于百纳秒的脉宽输出,是目前转镜技术得到的最佳结果。

In order to obtain a kind of spinning prism with high spinning speed, continuous adjustability and robust stability, the driving system of a high-speed motor for spinning prism Q-switch was designed. Using an AVR chip and a grid electrode driving integrating module, the high-speed motor controlled by three-phase frequency conversion was designed. The results show that the driving system of the motor can work stably when the rotation speed is less than 60.8 kr/min, which can realize “fast” shutoff of the Q-switch. The designed Q-switch is applied in Diode Pumped Solid State Laser(DPSSL), and the 14 kHz turning-off-ability Q-switch in the high repetition rate and high-power DPSSL is realized in a experiment with the rotation speed of 43 kr/min, which is the best result in the spinning mirror Q-switch by now.