3 October 2006 AIM results for space-qualified HgCdTe photovoltaic detectors from 0.9-μm to 13-μm spectral range
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Abstract
Remote sensing from space is an emerging market for applications in security, climate research, weather forecast, and global environmental monitoring, to mention a few. In particular, next generation systems demand for large, two-dimensional arrays in the short (SWIR, 0.9-2.5 μm) and the very long wavelength infrared (VLWIR) spectral range up to 15 μm. AIM's developments for space applications benefit from AIM's experiences in high-performance thermal imaging and seeker-head applications. AIM has delivered a 13 μm cut-off demonstrator for a high resolution Fourier-transform imaging spectrometer in limb geometry. For this 256 x 256 VLWIR sensor we measured a responsivity of 100 LSB/K and a noise equivalent temperature difference of 22 mK with 14 bit ADCs at 880 Hz full frame-rate. The substrate and epitaxial layer grown at AIM exhibit very good uniformity and low dark currents. Currently, AIM develops a 1024 x 256 SWIR detector (0.9-2.5 μm) with a capacitance transimpedance amplifier (CTIA) for hyperspectral imaging. The radiation hardness of AIM's FPA technology (MCT sensor and Silicon read-out integrated circuit) has been successfully tested by a total ionization dose (TID) experiment using ESTEC's 60Co γ-source. Our reference module withstands 30 krad TID. For enhanced reliability of the IDCA, AIM has developed a compact 1 W pulse-tube cooler with flexure bearing compressor, which induces also a very low vibration output. In summary, AIM will be able to supply space qualified detector modules covering the spectral range from 0.9 to 13 μm in the near future.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. Haiml, A. Bauer, H. Bitterlich, M. Bruder, K. Hofmann, H. Lutz, M. Mai, H.-P. Nothaft, I. Rühlich, J. Wendler, T. Wiedmann, R. Wollrab, and J. Ziegler "AIM results for space-qualified HgCdTe photovoltaic detectors from 0.9-μm to 13-μm spectral range", Proc. SPIE 6361, Sensors, Systems, and Next-Generation Satellites X, 636119 (3 October 2006); doi: 10.1117/12.689700; https://doi.org/10.1117/12.689700
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