The paper presents the new infrared detection module developed at the VIGO System Ltd. Its high sensitivity of was
achieved by both matching the IR detector to the preamp and minimizing noises. High sensitivity of the detector was
achieved by using photodiodes with immersion lens. Immersion lens enables optimization of the detector area,
decreasing detector capacity and time constant. Detector noise was reduced as a result of photodiode cooling by means
of a thermoelectric cooler and reverse biasing. Developed module is dedicated to NOx optoelectronic sensors operates
basing on Cavity Enhanced Absorption Spectroscopy technique.
Sensitive and broadband detection of MWIR and LWIR radiation with any wavelength within the 2 to 16 μm
spectral range and bandwidth from DC to GHz range is reported. Recent efforts have been concentrated on the extension
of useful spectrum range above 13 micrometers. This was achieved with improved architecture of the active element, use
of monolithic optical immersion technology, enhanced absorption of radiation, dedicated electronics, series connection
of small cells and applying more efficient Peltier coolers.
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