Infrared and Laser Engineering, Volume. 46, Issue 10, 1003005(2017)
Research on the gain saturation effect of an image intensifier based on microchannel plate
To study the influence of laser radiation on the performance of an image intensifier, the irradiation experiment of CW laser on the image intensifier was carried out and the effect of laser irradiation on its gain characteristics was analyzed. Experimental results show that no pixel crosstalk phenomenon is found as the increase of the laser power until the light illumination arrives 8×104 times of the illumination for point saturation, meaning that the gain of the image intensifier is saturated and the output light intensity of image intensifier will not increase indefinitely. The equivalent circuit model of the microchannel plate of the image intensifier was established and its gain characteristic was analyzed. The maximum current for linear gain, got from this model, was approximately 1.64×10-10 A, which was very close to experimental data, indicating that the charge extracted from the microchannel wall cannot be replenished in time is the main reason of gain saturation.
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Xie Yuntao, Zhang Yujun, Wang Xi, Sun Xiaoquan. Research on the gain saturation effect of an image intensifier based on microchannel plate[J]. Infrared and Laser Engineering, 2017, 46(10): 1003005
Category: 特约专栏-野光电器件激光辐照效应冶
Received: Jul. 13, 2017
Accepted: Sep. 13, 2017
Published Online: Nov. 27, 2017
The Author Email: Yuntao Xie (wsqijian@126.com)