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

doi:10.1117/12.826497

11 August 2009 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

Author Affiliations +

Proceedings Volume 7460, Lidar Remote Sensing for Environmental Monitoring X; 746004 (2009) https://doi.org/10.1117/12.826497
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

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.

Citation Download Citation

Benjamin G. Lee, Jan Kansky, Anish K. Goyal, Christian Pflügl, Laurent Diehl, Mikhail A. Belkin, Antonio Sanchez, and Federico Capasso "Wavelength beam combining of quantum cascade laser arrays for remote sensing", Proc. SPIE 7460, Lidar Remote Sensing for Environmental Monitoring X, 746004 (11 August 2009); https://doi.org/10.1117/12.826497

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