Coherence imaging for laser detection

Abstract

The detection of lasers by means of coherence detection often uses interferometry in a one-dimensional manner such as with a Mach Zehnder interferometer. We are taking a two dimensional approach making use of a spatial light modulator and a camera to examine the results of binary holography in differentiating coherent and incoherent incoming light. A DMD micromirror array focusing light onto a CCD camera is presented as a method for determining the presence of coherent light, its wavelength and angle of arrival. We discuss the use of Zernike modes to overcome the aberrations inherent in the DMD device, thereby improving the focussing quality and improving the precision of wavelength determination.

Publication DOI: https://doi.org/10.1117/12.2573194
Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Engineering & Applied Sciences > Mechanical Engineering & Design
Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
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 ... 194.short?SSO=1 (Publisher URL)
PURE Output Type: Conference article
Published Date: 2020-09-20
Accepted Date: 2020-09-01
Authors: Benton, David ( 0000-0003-0663-1404)
Sugden, Kate ( 0000-0001-6323-1082)
Zandi, Marie

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