Wavelength beam combining of quantum cascade laser arrays for remote sensing

Benjamin G. Lee, Jan Kansky, Anish K. Goyal, Christian Pflügl, Laurent Diehl, Mikhail A. Belkin, Antonio Sanchez, Federico Capasso

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Wavelength beam combining was used to co-propagate beams from 28 elements in a linear array of distributedfeedback quantum cascade lasers (DFB-QCLs). The overlap of the beams in the far-field is improved using wavelength beam combining; the beam-quality product of the array, defined as the product of near-field spot size and far-field divergence for the entire array, was improved by a factor of 21. We measured the absorption spectrum of isopropanol at a distance of 6 m from the laser arrays, demonstrating the efficacy of wavelength beam combined DFB-QCL arrays for remote sensing.

Original languageEnglish
Title of host publicationLidar Remote Sensing for Environmental Monitoring X
DOIs
StatePublished - 2009
Externally publishedYes
EventLidar Remote Sensing for Environmental Monitoring X - San Diego, CA, United States
Duration: 3 Aug 20093 Aug 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7460
ISSN (Print)0277-786X

Conference

ConferenceLidar Remote Sensing for Environmental Monitoring X
Country/TerritoryUnited States
CitySan Diego, CA
Period3/08/093/08/09

Keywords

  • distributed feedback
  • laser arrays
  • laser beam combining
  • quantum cascade laser

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