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

被引：2

作者：

Mueller, Reik ^{[1
]}

Kendziora, Christopher A. ^{[2
]}

Furstenberg, Robert ^{[2
]}

机构：

[1] BAAINBw, Ferdinand Sauerbruch Str 1, D-56073 Koblenz, Germany

[2] Naval Res Lab, Code 6365,4555 Overlook Ave SW, Washington, DC 20375 USA

来源：

MICRO- AND NANOTECHNOLOGY SENSORS, SYSTEMS, AND APPLICATIONS IX | 2017年 / 10194卷

关键词：

Stand-off detection; QCL tuning; infrared detection; position stabilizing; real time control; electro-optical feedback loop;

D O I：

10.1117/12.2262202

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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.

引用

页数：13

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