Laser detection using liquid crystal polarization modulators


Lasers can be identified by their relatively long coherence lengths using interferometry. A Mach–Zehnder interferometer incorporating liquid crystal polarization modulators is demonstrated as a means of low-cost, robust laser detection. Temporal modulations, as a signature of coherence, can be induced by modulating polarization changes in liquid crystal modulators using low voltages. Sensitivities of <10  nW can be achieved. The suitability as a means of laser detection is discussed.

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Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: Copyright 2020 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
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Related URLs: https://www.spi ... 9.6.064106.full (Publisher URL)
PURE Output Type: Article
Published Date: 2020-06-08
Accepted Date: 2020-06-01
Authors: Benton, David M. ( 0000-0003-0663-1404)



Version: Published Version

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