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Proceedings Paper

Low threshold short cavity quantum cascade lasers
Author(s): Xing Chen; Liwei Cheng; Dingkai Guo; Fow-Sen Choa; Terry Worchesky
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Paper Abstract

Low threshold quantum cascade lasers (QCLs) are important for low-power chemical sensor applications. We report a low-threshold high-period-number 4.8μm strain-balanced InGaAs/InAlAs quantum cascade laser. By growing more periods (up to 60 periods) of QCL stages, shortening the QCL cavity length, and applying high-reflectivity coatings on both facets of the laser cavity, low threshold QCLs can be obtained. At current stage a QCL threshold of <30mA at 20K, <50mA at 80K, and <120mA near room temperature were achieved. Low current threshold QCLs will have significant impacts to future chemical sensing systems.

Paper Details

Date Published: 17 February 2011
PDF: 6 pages
Proc. SPIE 7953, Novel In-Plane Semiconductor Lasers X, 79531Z (17 February 2011); doi: 10.1117/12.875960
Show Author Affiliations
Xing Chen, Univ. of Maryland, Baltimore County (United States)
Liwei Cheng, Univ. of Maryland, Baltimore County (United States)
Dingkai Guo, Univ. of Maryland, Baltimore County (United States)
Fow-Sen Choa, Univ. of Maryland, Baltimore County (United States)
Terry Worchesky, Univ. of Maryland, Baltimore County (United States)


Published in SPIE Proceedings Vol. 7953:
Novel In-Plane Semiconductor Lasers X
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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