English

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}
}
R2 v1 2026-06-23T16:31:33.771Z