Low-cost laser detection system with a 360-deg horizontal field of view

Abstract

A low-cost laser detection system based on coherence detection has been developed and is able to detect weak, continuous laser sources even against bright background light. The system is composed of a Mach–Zehnder interferometer with one arm modified with a piezo-mounted mirror to modulate the path length. We introduce methods to determine the laser wavelength and to extend the horizontal field of view of the detector. To widen the field of view, a cone mirror is added to the system while the additional use of a camera allows the direction of the incoming laser beam to be studied. The wavelength from three different lasers is estimated with the use of the modulation amplitude of the piezo mirror. The preliminary results demonstrate that a 360-deg horizontal field of view can be achieved and that the direction of the laser beam can be determined with an estimated angular precision of ±5  deg. Moreover, the wavelength can be determined with a precision of ±10  nm. The system trades sensitivity for a larger field of view with the resultant detection sensitivity equal to 70 nW (or 1  μW  ·  cm  −  2) at 635 nm.

Publication DOI: https://doi.org/10.1117/1.oe.60.2.027106
Divisions: College of Engineering & Physical Sciences > Electrical, Electronic & Power Engineering
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Mechanical Engineering & Design
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology
Additional Information: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI
Uncontrolled Keywords: coherence discrimination,cone mirror,field of view,laser detection,laser direction,wavelength determination,Atomic and Molecular Physics, and Optics,Engineering(all)
Full Text Link:
Related URLs: https://www.spi ... 7106.full?SSO=1 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-02-18
Accepted Date: 2021-01-27
Authors: Zandi, Marie
Sugden, Kate (ORCID Profile 0000-0001-6323-1082)
Benton, David M. (ORCID Profile 0000-0003-0663-1404)

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