Feedback stabilization of quantum cascade laser beams for stand-off applications

Reik Müller; Christopher A. Kendziora; Robert Furstenberg

doi:10.1117/12.2262202

18 May 2017 Feedback stabilization of quantum cascade laser beams for stand-off applications

Reik Müller, Christopher A. Kendziora, Robert Furstenberg

Proceedings Volume 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX; 101942U (2017) https://doi.org/10.1117/12.2262202
Event: SPIE Defense + Security, 2017, Anaheim, CA, United States

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.

Citation Download Citation

Reik Müller, Christopher A. Kendziora, and Robert Furstenberg "Feedback stabilization of quantum cascade laser beams for stand-off applications", Proc. SPIE 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX, 101942U (18 May 2017); https://doi.org/10.1117/12.2262202

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