用金属氧化物半导体场效应晶体管器件实现的高重复率电光调Q模块设计

随着激光器的发展,需要高重复率的电光调Q器件。提出了一种新型超快、高重复率的电光调Q技术,这种技术采用V型槽的金属氧化物半导体场效应晶体管(VMOSFET)器件作为调Q模块的主功率开关,运用宽范围可调的高压稳压电源和调Q触发信号整形电路,以及加压调Q和退压调Q的兼容电路。实验中得出:当调Q工作频率为10 kHz时,调Q电压幅度3~5 kV任意可调,电压脉冲宽度小于5 ns,触发抖动时间小于1μs,且可以长期稳定工作。该调Q模块已经用于激光二极管(LD)抽运的无水冷固体Nd∶YAG激光器和连续Nd∶YAG激光器中。

Design of High Repetition Rate Electro-Optically Q-Switched Module with Vertical Metal Oxide Semiconductor Field Effect Transistor Component

High repetition rate electro-optically Q-switched component is needed with the development of laser. By experiment, a novel ultra quick and high repetition rate electro-optically Q-switched technology is presented. Vertical metal oxide semiconductor field effect transistor (VMOSFET) is adopted as main power switch of Q-switched module. Adjustable high voltage-stabilized source and reshaping circuit of Q-switched trigger signal, as well as the compatible circuit for adding voltage and draw back voltage of Q-switching are used. In the experiment, when the Q-switched module operating at 10 kHz, Q-switched voltage ranges freely from 3 kV to 5 kV, the width of voltage pulse is less than 5 ns, the shaking time of pulse is less than 1 μs, it works steadily and chronically. The Q-switched module has already been used in the laser diode (LD) pumped without water cooling solid Nd∶YAG laser and continuously Nd∶YAG laser.