建立了精确的激光触发变压器型脉冲调制器的同步触发系统。分别对脉冲调制器初级电脉冲触发控制信号与电脉冲输出时刻之间、变压器充电起始时刻与激光器Q开关触发信号之间、激光信号与脉冲调制器放电时刻之间的延时进行了测量, 并分析其相互间时序关系；通过对变压器输出电压信号进行采样滤波后, 利用比较器输出逻辑门电路(TTL)信号作为激光器Q开关触发信号, 实现了脉冲形成线充电时间与激光触发主开关放电过程的同步控制。开展了激光触发脉冲功率调制器主开关的实验研究, 在形成线充电电压-590 kV时, 在假负载上得到-305 kV, 20 kA的电脉冲, 脉冲宽度126 ns, 激光到达主开关时刻与开关导通时刻间延时35 ns。

A synchronization system for laser triggered transformer-type coaxial spiral pulse modulator was designed. Using the electrical pulse to trigger the primary trigger switch and the laser pulse to trigger the main gas switch of the pulse forming line (PFL), the PFL is successfully triggered by controlling the working time of both the pulses. The delay and jitter of the electrical pulse generator, pulse transformer, pulse voltage at the load, laser flash-lamp and Q-switch signal were measured and analyzed. The charging voltage of the PFL was sampled after being filtered for avoiding the electromagnetic interference and then introduced to the comparison device to generate transistor-transistor logic pulse to trigger the Q-switch of Nd:YAG pulse laser device. When the PFL is charged at -590 kV, which is also the gas breakdown voltage, the high power electrical pulse with voltage of -305 kV, current of 20 kA and pulse width of 126 ns is obtained at the dummy load. The delay between the time that the laser pulse arrives at the switch and the switch breakdown moment is 35 ns.