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Noise spectra of type-II strained layer superlattice midwave infrared photodetectors were compared pre- and post-irradiation by a proton fluence of $\mathrm {7.5\times 10^{11}~ cm^{-2}}$ [total ionizing dose equivalent of 100 krad (Si)] and related to the shot noise limit at biases ranging from +200 to −800 mV and temperatures of 130 and 160 K. Pre-irradiation dark current at 130 K was 7.5X Rule...
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