GW级纳秒脉冲源激光触发同步实验

Laser-triggered synchronization experimentof GW-level nanosecond pulse sources

结合GW级纳秒脉冲源建立了实验平台,研究了激光触发开关的延迟时间及其抖动与激光能量、工作电压、激光波长、透镜焦距等参数的关系。结果表明:开关延迟与抖动随激光脉冲能量的上升、工作电压的上升而逐渐减小;采用紫外光得到的开关延迟与抖动小于相同条件下红外光得到的结果;在高气压小间隙开关条件下,采用小的透镜焦距可以得到更小的开关延迟与抖动。开关在自击穿电压220kV、欠压比为80%、采用7mJ,266nm波长激光时的抖动为0.3ns,在此条件下进行了两台脉冲源的同步实验,得到其同步偏差85%置信率小于0.3ns。

Based on the experiment platform with ultra-wide spectrum pulse source of GW level,the thesis investigates the influence on the delay time and jitter of laser-triggered switch of some relative parameters,such as laser pulse energy,laser wavelength,working voltage,and focal length of lens.The experimental results show that,the delay time of the switch decreases gradually as the laser energy or the working voltage increases.When 266 nm laser is adopted,smaller jitter can be achieved than using 1 064 nm laser.On condition of high pressure and small switch gap,the use of lens with smaller focal length shortens the delay time.The jitter is less than 0.3 ns while the self-breakdown voltage is 220 kV,the working ratio is larger than 80% and the energy of the 266 nm laser pulse is 7 mJ.In this condition,the synchronization experiment of two GW-level pulse sources is carried out and the synchronization difference is below 0.3 ns at the probability of 85%.