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Proceedings Paper

Quantum cascade laser as a mid-infrared photovoltaic and photoconductive detector
Author(s): Xing Chen; David Shyu; Fow-Sen Choa; Sudhir Trivedi
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Paper Abstract

We report the operation of quantum cascade lasers (QCLs) as a mid-infrared (mid-IR) photo-detector under both photovoltaic and photoconductive modes. When operated at photoconductive mode, negative photo-conductance is observed at low bias current. The photo-conductance of the device changes from negative to positive when the bias is increased over a transparency point. These interesting mid-IR detection characteristics of QCL gain material can help and simplify the design and testing of mid-IR photonic integrated devices and circuits by using them to measure the coupling and waveguide loss and provide gain at any location in a mid-IR photonic circuit.

Paper Details

Date Published: 20 May 2011
PDF: 7 pages
Proc. SPIE 8012, Infrared Technology and Applications XXXVII, 80123N (20 May 2011); doi: 10.1117/12.884424
Show Author Affiliations
Xing Chen, Univ. of Maryland, Baltimore County (United States)
David Shyu, Univ. of Maryland, Baltimore County (United States)
Fow-Sen Choa, Univ. of Maryland, Baltimore County (United States)
Sudhir Trivedi, Brimrose Corp. of America (United States)

Published in SPIE Proceedings Vol. 8012:
Infrared Technology and Applications XXXVII
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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