Laser detection using liquid crystal polarization modulators
Signal Processing
2020-06-28 v1 Instrumentation and Detectors
Optics
Abstract
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 less than 10nW can be achieved. The suitability as a means of laser detection is discussed.
Cite
@article{arxiv.2006.12365,
title = {Laser detection using liquid crystal polarization modulators},
author = {David M Benton},
journal= {arXiv preprint arXiv:2006.12365},
year = {2020}
}