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Proceedings Paper

Wavelength beam combining of quantum cascade laser arrays for remote sensing
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Paper 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.

Paper Details

Date Published: 11 August 2009
PDF: 9 pages
Proc. SPIE 7460, Lidar Remote Sensing for Environmental Monitoring X, 746004 (11 August 2009); doi: 10.1117/12.826497
Show Author Affiliations
Benjamin G. Lee, Harvard Univ. (United States)
Jan Kansky, MIT Lincoln Lab. (United States)
Anish K. Goyal, MIT Lincoln Lab. (United States)
Christian Pflügl, Harvard Univ. (United States)
Laurent Diehl, Harvard Univ. (United States)
Mikhail A. Belkin, Harvard Univ. (United States)
Antonio Sanchez, MIT Lincoln Lab. (United States)
Federico Capasso, Harvard Univ. (United States)

Published in SPIE Proceedings Vol. 7460:
Lidar Remote Sensing for Environmental Monitoring X
Upendra N. Singh, Editor(s)

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