用光导开关产生高压、高功率超快电脉冲

Generation of the ultrashort,high-voltage and high-power electrical pulse using a photoconductive switch

基于半导体材料的光导效应，设计并制做光导开关，在偏压为４０００Ｖ，负载电阻Ｚ＿０为５０Ω时，用脉宽为～１２ｎｓ的激光脉冲辐照光导开关，得到脉宽为～１６ｎｓ，峰值电压为～１．８ｋＶ，峰值功率为～６５ｋＷ的电脉冲，本文并对光导开关的技术关键进行了分析。

Based on the photoconductive effect of the semiconductor,the photo-conductive switch has been developed.The photoconductive switch is biased at 4kV bias voltage,and can generate a electrical pulse in 50 ohm load with peak voltage～1. 8kV, peak power～65kW and 16ns duration,when the switch is triggered by a laser pulse with 12 ns pulsewidth.In this paper,the keytechnologies of the photoconductive switch,such as dark resistance. carrier life、constant resistance etc,are described.