Based on AIM’s state-of-the-art MCT IR technology, detector modules for the SWIR spectral range have been
developed, fabricated and characterized. While LPE grown MCT FPAs with extended 2.5μm cut-off have been
fabricated and integrated also MBE grown MCT on GaAs is considered for future production.
Two imaging applications have been in focus operating either in passive mode by making use of e.g. the night glow, or
in active mode by laser illumination for gated viewing. Dedicated readout integrated circuits (ROIC), realized in
0.18μm Si-CMOS technology providing the required functionality for passive imaging and gated imaging, have been
designed and implemented. For both designs a 640x512 15μm pitch format was chosen. The FPAs are integrated in
compact dewar cooler configurations using AIM’s split linear coolers. A command and control electronics (CCE)
provides supply voltages, biasing, clocks, control and video digitization for easy system interfacing.
For imaging under low-light conditions a low-noise 640x512 15μm pitch ROIC with CTIA input stages and correlated
double sampling was designed. The ROIC provides rolling shutter and snapshot integration. To reduce size, weight,
power and cost (SWaP-C) a 640x512 format detector in a 10μm pitch is under development. The module makes use of
the extended SWIR spectral cut-off up to 2.5μm.
To be used for active gated-viewing operation SWIR MCT avalanche photodiodes have been implemented and
characterized on FPA level in a 640x512 15μm pitch format. The specific ROIC provides also the necessary functions
for range gate control and triggering by the laser illumination. First lab and field tests of a gated viewing demonstrator
have been carried out.
The paper will present the development status and performance results of AIM’s MCT based SWIR Modules for