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Proceedings Paper

Mid-infrared "W" diode lasers and their application to methane sensing
Author(s): William W. Bewley; Chadwick L. Canedy; Chulsoo Kim; Igor Vurgaftman; Mijin Kim; Jerry R. Meyer; Jongjin G. Kim; Ramon U. Martinelli; Roger C. Farmer
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Paper Abstract

Mid-infrared “W” quantum-well diode lasers with reduced turn-on voltages are reported. Devices with coated facets operated in continuous-wave mode up to 195 K, where the emission wavelength was 3.56 microns. At 78 K the threshold current density was 67 A/cm2, the maximum output power was 198 mW, and the maximum slope efficiency was 106 mW/A. One of these lasers was used to detect methane, by exploiting the absorption band in the vicinity of 3.3 microns. Preliminary measurements demonstrated detection of methane at partial pressures down to 7 x 10-7 atm. in a nitrogen atmosphere.

Paper Details

Date Published: 11 May 2004
PDF: 9 pages
Proc. SPIE 5365, Novel In-Plane Semiconductor Lasers III, (11 May 2004); doi: 10.1117/12.529381
Show Author Affiliations
William W. Bewley, Naval Research Lab. (United States)
Chadwick L. Canedy, Naval Research Lab. (United States)
Chulsoo Kim, Naval Research Lab. (United States)
Igor Vurgaftman, Naval Research Lab. (United States)
Mijin Kim, Naval Research Lab. (United States)
Jerry R. Meyer, Naval Research Lab. (United States)
Jongjin G. Kim, Sarnoff Corp. (United States)
Ramon U. Martinelli, Sarnoff Corp. (United States)
Roger C. Farmer, Avisys Inc. (United States)


Published in SPIE Proceedings Vol. 5365:
Novel In-Plane Semiconductor Lasers III
Claire F. Gmachl; David P. Bour, Editor(s)

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