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SWIR detectors for low photon fluxes

: Rutz, Frank; Kleinow, Philipp; Aidam, Rolf; Bronner, Wolfgang; Stolch, Lukas; Benecke, M.; Sieck, A.; Rehm, Robert


LeVan, P.D. (Ed.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Infrared Sensors, Devices, and Applications VI : San Diego, California, United States, August 28, 2016
Bellingham, WA: SPIE, 2016 (Proceedings of SPIE 9974)
Paper 99740G, 11 S.
Conference "Infrared Sensors, Devices, and Applications" <6, 2016, San Diego/Calif.>
Fraunhofer IAF ()
short-wave infrared; SWIR imaging; InGaAs; InAlAs; avalanche photodiode; APD; gated viewing; Key Publication

Active and passive short-wave infrared (SWIR) detection systems for surveillance and remote sensing applications are mostly required to detect extremely low photon fluxes. This can be achieved by utilizing the internal signal gain as provided by avalanche photodiodes (APDs). We report on our current development activities of SWIR photodetectors based on InGaAs/InAlAs/InP APDs, covering detector design, epitaxial growth, process technology, and electro-optical characterization results of single-element detectors and fanout hybrids. For the first time, the operation of an InGaAs based SWIR camera with 640 × 512 pixels utilizing APDs for signal amplification is demonstrated for operating temperatures of 180 K and even 260 K.