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Xi Luo

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Proceedings Article | 18 March 2024 Paper

Determination of blind elements of InGaAs short-wave infrared focal plane detector with high effective pixel rate for low-orbit satellite communication based on dark signal voltage change rate and sliding window detection

Yuebo Liu, Meng Wang, Xi Luo, HongYue Wang, CanXiong Lai, ShaoHua Yang, GuoGuang Lu, Teng Ma

Proceedings Volume 13104, 131041M (2024) https://doi.org/10.1117/12.3022586

KEYWORDS: Infrared detectors, Short wave infrared radiation, Indium gallium arsenide, Reliability, Satellite communications

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The effective pixel rate is a key performance parameter of infrared focal plane detectors and is also a key parameter for assessing the reliability degradation trend of the device. The application scenario of InGaAs short wavelength infrared focal plane detectors for interstellar alignment is different from that of conventional imaging detectors, where the signal values of each pixel of the focal plane are mainly used to determine the position of the laser bright spot, rather than the gray values used to generate the image. From the point of view of blind element evaluation, for the low-orbit satellite communications application scenario, the rate of change of the response values of the image elements in each local region of the InGaAs short-wave infrared focal plane detector for interplanetary alignment with optical flux has a greater impact on the performance of the device than the absolute response values of the image elements. In order to adapt to this evaluation requirement, this work designs a sliding window blind element determination method based on the rate of change of the dark signal voltage for the intrinsic characteristics of the detector, which utilizes the principle of equivalence of the effects of luminous flux and integration time on the detector signal voltage value, which is more adaptable to the practical application scenarios of interstellar-aligned shortwave infrared focal plane detectors, and the entire focal plane is divided into a number of localized regions, and the sliding detection window is used for blind element determination, which avoids the fully aligned shortwave infrared focal plane detector. Blind meta-judgment, which avoids the phenomenon of misjudgment that often occurs in global judgment. This blind judgment method is also of great importance for the reliability evaluation of InGaAs shortwave infrared focal plane detectors with high effective pixel rate for interstellar alignment.

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