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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 18 — Aug. 31, 2009
  • pp: 16216–16224

Beam combining of quantum cascade laser arrays

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

Optics Express, Vol. 17, Issue 18, pp. 16216-16224 (2009)

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Wavelength beam combining was used to co-propagate beams from 28 elements in an array of distributed-feedback quantum cascade lasers (DFB-QCLs). 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 by using wavelength beam combining. To demonstrate the applicability of wavelength beam combined DFB-QCL arrays for remote sensing, we obtained the absorption spectrum of isopropanol at a distance of 6 m from the laser array.

© 2009 Optical Society of America

OCIS Codes
(140.3290) Lasers and laser optics : Laser arrays
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(140.3298) Lasers and laser optics : Laser beam combining
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Lasers and Laser Optics

Original Manuscript: March 26, 2009
Revised Manuscript: May 31, 2009
Manuscript Accepted: June 7, 2009
Published: August 27, 2009

Benjamin G. Lee, Jan Kansky, Anish K. Goyal, Christian Pflügl, Laurent Diehl, Mikhail A. Belkin, Antonio Sanchez, and Federico A. Capasso, "Beam combining of quantum cascade laser arrays," Opt. Express 17, 16216-16224 (2009)

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