Pulse-Bias Modulation Of A PbS Mosaic Array

Abstract

Two -dimensional x -y addressed mosaic arrays of more than 12,000 lead-sulfide detectors each (64 by 192 detectors in an active area slightly larger than 6.4 by 19 mm) have been successfully developed and demonstrated at Aerojet ElectroSystems Company. This paper describes the pulse -bias modulation concept used to operate the detectors and multiplex their outputs and the design and fabrication techniques used to implement this concept. The measured performance of an array which was independently verified by the Naval Ocean Systems Center in San Diego is described, and data for an additional 10 modules (a total of more than 105 detectors) are summarized.

Polycrystalline PbSe x-y addressed uncooled FPAs

“…In figure 4 a SEM image of a PbSe film after this sensitization process is shown. The standard way to perform the electrooptical characterization of an x-y addressed array is using the Pulse-Bias Modulation (PBM) method [25]. It basically consists of a fast bias pulse that does not disturb the detector integrating response to incident energy.…”