激光引信窄脉冲光源驱动电路设计(英文)

Design of narrow pulse light source driving circuit of laser fuze

针对激光引信小型化和高性能的工作需求,设计了一种新型半导体激光器(LD)驱动电路。电路采用高速MOSFET作为开关器件,为激光器提供脉宽窄、上升时间短、峰值电流大的驱动脉冲。建立了相应的驱动电路模型,设计制作了尺寸为19 mm×10 mm的驱动电路,仿真和实验分析了供电电源、充电电容和阻尼电阻对驱动脉冲的影响。并根据仿真和实验结果选取最佳的电路参数,在此条件下驱动脉冲的脉宽为8.6 ns、前沿上升时间为4 ns、峰值电流为39 A。该电路为激光引信探测性能的提高提供参考。

Aiming at the miniaturization and high performance requirements of laser fuze, a novel driving circuit was designed to drive the pulse laser diode. The circuit used high-speed MOSFET as the switching element to generate a driving pulse with narrow pulse width, short rise time and large peak current for laser diode. A corresponding driving circuit model was established. The effects of supply voltage, energy storage capacitor and damping resistor on the performance of driving pulse were analyzed by simulation and experiment. A driving circuit with the size of 19 mm ×10 mm was designed and the optimal circuit parameters were selected. The driving circuit provides a driving pulse with pulse width of8.6 ns, rise time of 4 ns and peak current of 39 A. The design provides an effective improvement of detection performance of laser fuze.