Radiation-Hardened Photon-Sensitive LADAR Camera

To satisfy the need for a radiation-hardened, 1064-nm laser sensitive, single-photon sensitive ladar camera, with pixel counts of 128 x 128 or more, a proven single-photon linear-mode InGaAs(P)/InAlAs avalanche-photodiode (APD) detector will be integrated with low-noise ladar readout integrated circuits (ROICs), and its performance will be shown compatible with missile defense mission requirements. Using numeric modeling, validated by empirical measurements, the device will be optimized for high detection efficiency, and low dark count rates, even after radiation exposure. The data gathered in Phase I, supported by models, will be used to optimize a high-performance radiation-hardened APD array in Phase II. In Phase II, the 128 x 128-element array will be coupled to an existing radiation-hardened ROIC and demonstrated using proven ladar camera electronics. Approved for Public Release | 18-MDA-9817 (23 Oct 18)