Low Cost Detection of Lasers


A low-cost method of detecting lasers based on detecting coherence properties of received light is presented. The method uses an unbalanced Mach–Zehnder interferometer with a modulating piezo-mounted mirror in one arm to discriminate against incoherent background light and identify the presence of laser radiation at the nW level against much brighter backgrounds. The wavelength of the coherent input can be determined by comparing the intensities of the modulation frequency harmonics.

Publication DOI: https://doi.org/10.1117/1.OE.56.11.114104
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. Funding: Centre for Defence Enterprise within UK MoD.
Uncontrolled Keywords: laser detection; modulation; wavelength measurement
Publication ISSN: 1560-2303
Last Modified: 08 Jan 2024 08:35
Date Deposited: 22 Nov 2017 16:55
Full Text Link:
Related URLs: https://www.spi ... .11.114104.full (Publisher URL)
PURE Output Type: Article
Published Date: 2017-11-15
Accepted Date: 2017-10-31
Authors: Benton, David (ORCID Profile 0000-0003-0663-1404)



Version: Published Version

License: Creative Commons Attribution

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