剩余电压对脉冲氙灯放电特性的影响研究

Research on the effect of residual voltage on the discharging characteristics of xenon flash lamp

结合脉冲氙灯泵浦工作过程分析了剩余电压的产生机理,理论分析了剩余电压对脉冲氙灯放电特性的影响,并进行了实验测试。测试结果表明:随着剩余电压的增大,氙灯发光波形的形状基本保持不变,但发光功率峰值逐渐减小,当达到不稳定状态时(剩余电压为308V),峰值功率降至初始值的61.4%;同时,闪光时间也相应减小25μs左右。由此可见,剩余电压的存在将直接影响到激光发射装置的出光稳定性、激光脉冲宽度以及激光功率。鉴于此,在今后氙灯泵浦激光设备的设计、研制时,必须对剩余电压的影响进行充分论证,根据激光装置的工作特性和应用要求,合理确定剩余电压的上限。

The mechanism of the residual voltage was analyzed combined with the working process of pulsed xenon lamp-pump,the impact of the residual voltage on pulsed xenon lamp discharging characteristics was analyzed theoretically,and the experimental test was carried out.The experiment results showed that,with the increase of the residual voltage,the xenon lamp light waveform shape remained unchanged,but the light-emitting peak power decreased gradually.When the residual voltage moved into an unstable state（residual voltage is 308 V）,the peak power dropped to 61.4% of the initial value;at the same time,the flash time reduced about 25 μs.This is bound to affect the laser device′s light stability,the laser pulse width and laser power.In view of this,the impact of the residual voltage in the future design and research of xenon lamp-pumped laser devices must be fully demonstrated.The upper limit of the reasonable residual voltage in accordance with the operating characteristics of the laser device and application requirements should also be determined.