24 June 2014 Large format 15μm pitch XBn detector
Author Affiliations +
Over the past few years, a new type of High Operating Temperature (HOT) photon detector has been developed at SCD, which operates in the blue part of the MWIR atmospheric window (3.4 - 4.2 μm). This window is generally more transparent than the red part of the MWIR window (4.4 - 4.9 μm), and thus is especially useful for mid and long range applications. The detector has an InAsSb active layer and is based on the new "XBn" device concept, which eliminates Generation-Recombination dark current and enables operation at temperatures of 150K or higher, while maintaining excellent image quality. Such high operating temperatures reduce the cooling requirements of Focal Plane Array (FPA) detectors dramatically, and allow the use of a smaller closed-cycle Stirling cooler. As a result, the complete Integrated Detector Cooler Assembly (IDCA) has about 60% lower power consumption and a much longer lifetime compared with IDCAs based on standard InSb detectors and coolers operating at 77K. In this work we present a new large format IDCA designed for 150K operation. The 15 μm pitch 1280×1024 FPA is based on SCD's XBn technology and digital Hercules ROIC. The FPA is housed in a robust Dewar and is integrated with Ricor's K508N Stirling cryo-cooler. The IDCA has a weight of ~750 gram and its power consumption is ~ 5.5 W at a frame rate of 100Hz. The Mean Time to Failure (MTTF) of the IDCA is more than 20,000 hours, greatly facilitating 24/7 operation.
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Yoram Karni, Yoram Karni, Eran Avnon, Eran Avnon, Michael Ben Ezra, Michael Ben Ezra, Eyal Berkowitz, Eyal Berkowitz, Omer Cohen, Omer Cohen, Yossef Cohen, Yossef Cohen, Roman Dobromislin, Roman Dobromislin, Itay Hirsh, Itay Hirsh, Olga Klin, Olga Klin, Philip Klipstein, Philip Klipstein, Inna Lukomsky, Inna Lukomsky, Michal Nitzani, Michal Nitzani, Igor Pivnik, Igor Pivnik, Omer Rozenberg, Omer Rozenberg, Itay Shtrichman, Itay Shtrichman, Michael Singer, Michael Singer, Shay Sulimani, Shay Sulimani, Avi Tuito, Avi Tuito, Eliezer Weiss, Eliezer Weiss, "Large format 15μm pitch XBn detector", Proc. SPIE 9070, Infrared Technology and Applications XL, 90701F (24 June 2014); doi: 10.1117/12.2049691; https://doi.org/10.1117/12.2049691

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