用于紫外激光脉冲电光开关的驱动脉冲源

利用雪崩晶体管作为高速开关器件、根据并联充电、串联放电原理设计了一种串并联相结合的MARX电路,以该电路为基础设计了一种低抖动高压脉冲驱动源,并将其应用于紫外激光脉冲的电光开关削波系统。通过同步调节器调节高压驱动脉冲和激光电光系统的时间匹配度,获得了驱动电脉冲与电光开关耦合的最佳工作状态;对匹配过程中的电光开关工作状态以及激光脉冲压缩过程进行了分析和研究,当高压驱动电脉冲幅度为2 690 V,脉宽为7.9 ns时,可以将脉宽为7.1 ns的紫外激光脉冲压缩至2.1 ns,KDP晶体的透光率达到了92.2%,电光开关的效率达到了31.7%。

Driving pulse source for ultraviolet laser pulse electro-optic switch

A MARX circuit was designed by connecting the avalanche transistors serially and parallel. A high-voltage pulse driving source with low jitter was developed based on this circuit, and it was applied on a electro-optical switch clipping system of ultraviolet laser pulse. The time matching degree between high-voltage driving pulse and laser electro-optic system was regulated by synchronous regulator to get the best work state of the driving electrical pulses coupling with the electro-optical switch; work state of the electro-optical switch and shaping process of the laser were researched while matching the working time, when the amplitude and pulse width of high-voltage driving pulse was 2 690 V and 7.9 ns, the UV laser pulse with 7.1 ns in pulse width can be compressed to 2.1 ns. Then the transmittance of KDP crystal is 92.2%, and the efficiency of electro-optic switch has reached 31.7%.