【作者】 柳涛； 袁孝； 张翔； 刘莉；

【Author】 LIU Tao~1 YUAN Xiao~1 ZHANG Xiang~1 LIU Li~2 1 State Key Lab of Laser Technology,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China 2 The Department of Electronics and Information,Wuhan University of Science and Engineering,Wuhan,Hubei 430070,China

【机构】 华中科技大学激光技术国家重点实验室； 武汉科技学院电子信息工程学院；

【摘要】 在恒压偏置的条件下,采用重复频率为1 kHz 和10 Hz 的飞秒激光分别对光导型室温中红外 HgCdTe 光电探测器进行辐照,得到了该探测器在飞秒激光辐照下的输出波形和失效时间。在重复频率为1 kHz,能量密度为 0．024 mJ/cm~2的飞秒激光连续辐照下,探测器输出信号表现为飞秒激光脉冲重复频率的波包,参考信号可分辨,但发生畸变；当能量密度增加到0．60 mJ/cm~2时,参考信号消失,探测器失效。在重复频率为10 Hz 的飞秒激光作用下,探测器的失效时间随飞秒激光能量密度的增加而增加,当激光能量密度增加到2．03 mJ/cm~2时,探测器的失效时间达到 520 μs。探测器输出波形表明,飞秒激光辐照过程中存在热效应,导致探测器电阻增加,输出信号电压上升。更多还原

【Abstract】 The output signal and out-of-service time of the PC type HgCdTe detectors are obtained when irradiated with femtosecond laser at the repetition rate of 1 kHz,and repetition rate of 10 Hz,respectively.When irradiated with the 1 kHz repetition rate femtosecond laser at the fluence of 0.024 mJ/cm~2,the output signal is distorted and the reference signal can be perceived,and the reference signal vanished,the detector disabled when the laser fluence increased to 0.60 mJ/cm~2.While irradiated with the femtosecond laser of l0 Hz repetition rate,the out-of-service time of the detector was increasing with the irradiated fluence and the out-of-service time of 520 μs is obtained at the fluence of 2.03 mJ/cm~2.The output signal indicates that the temperature of the detector is ascending while irradiated with femtosecond laser pulses continuously,which results in the resistance increasing.更多还原