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Feedback stabilization of quantum cascade laser beams for stand-off applications
Author(s): Reik Müller; Christopher A. Kendziora; Robert Furstenberg
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Paper Abstract

Techniques which apply tunable quantum cascade lasers (QCLs) for target illumination suffer from fluctuations of the laser beam direction. This manuscript describes a method to stabilize the beam direction by using an active feedback loop. This approach corrects and stabilizes the laser pointing direction using the signal from a 4-element photo sensor as input to control an active 2 dimensional Galvo mirror system. Results are presented for measurements using known perturbations as well as actual mode hops intrinsic to external cavity QCL during wavelength tuning.

Paper Details

Date Published: 18 May 2017
PDF: 13 pages
Proc. SPIE 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX, 101942U (18 May 2017); doi: 10.1117/12.2262202
Show Author Affiliations
Reik Müller, BAAINBw (Germany)
Christopher A. Kendziora, U.S. Naval Research Lab. (United States)
Robert Furstenberg, U.S. Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 10194:
Micro- and Nanotechnology Sensors, Systems, and Applications IX
Thomas George; Achyut K. Dutta; M. Saif Islam, Editor(s)

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