Wavelength beam combining of quantum cascade laser arrays for remote sensing
Author(s)
Sanchez-Rubio, Antonio; Goyal, Anish K.; Kansky, Jan E.; Capasso, Federico; Belkin, M. A.; Diehl, Laurent; Pflügl, Christian; Lee, Benjamin G.; ... Show more Show less
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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.
Date issued
2009-08Department
Lincoln LaboratoryJournal
Proceedings of SPIE--the International Society for Optical Engineering; v.7460
Publisher
The International Society for Optical Engineering
Citation
Lee, Benjamin G. et al. “Wavelength beam combining of quantum cascade laser arrays for remote sensing.” Lidar Remote Sensing for Environmental Monitoring X. Ed. Upendra N. Singh. San Diego, CA, USA: SPIE, 2009. 746004-9. © 2009 SPIE--The International Society for Optical Engineering
Version: Final published version
ISSN
0277-786X