Nonlinearity and persistence of the response of IR photodetector arrays to laser radiation

摘要

This paper presents the results of experimental studies of the action of laser radiation on InSb-based IR photodetector arrays. It is shown that there are two types of response of the photodetector to laser action: nonlinear propagation of laser noise over the entire surface of the array and persistence of the image of the laser beam, as a function of the characteristics of the laser radiation. It is experimentally found that the persistent image of the laser beam varies in signal amplitude of the dark current in illuminated photodiodes, depending on the irradiance of the focal-plane array and the irradiation time (the exposure dose of the irradiation).