QWIP-LED/CCD coupling study: final report

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Authors
  1. Chiu, S.
  2. Scott, A.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
Many space-based imaging applications demand a sensitive, low noise long wavelength IR detector which is able to image a wide field of view in a short time. Quantum Well Infrared Photodetector (QWIP)-LED detectors offer the potential for large imaging area, and ultra-low noise operation when cooled to cryogenic temperatures (-30K). Due to these factors the QWIP-LED holds a significant advantage over conventional detectors. It is in the area of system efficiency, however, that current QWIP-LEDs are less competitive for low signal space applications. This study was a collaborative effort between EMS technologies, DND, CRESTech and NRC with a goal to design and implement a method to increase the efficiency of QWIP-LED systems. As a result of this study, it has become apparent that early projections about the cost, quality, and efficiency of pixelless QWIP-LED technology were highly optimistic regarding critical implementation details. Unforeseen difficulties with the application of 'standard' LED and grating technologies to a non-standard device severely impacted the predicted efficiency for both absorption and emission. TRUNCATED
Keywords
QWIP (Quantum Well Infrared Photodetectors);Quantum wells;Light Emitting Diode (LED);Thermal detectors;INFRARED IMAGING
Report Number
DREO-TR-2000-101 — Technical Report
Date of publication
01 Nov 2000
Number of Pages
64
DSTKIM No
CA010462
CANDIS No
514958
Format(s):
Hardcopy;Document Image stored on Optical Disk

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