O'Donnell, L., Padgett, M. J. and Johnson, S. D. (2021) Optimising backscatter from multiple beam interference. Optics Express, 29(6), pp. 8770-8776. (doi: 10.1364/OE.420384)
Text
235950.pdf - Published Version Available under License Creative Commons Attribution. 4MB |
Abstract
Optical sensing applications are usually reliant on the intensity of the measured signal. For remote sensing applications where a target is probed with a laser beam, the sensitivity will be limited by the amount of backscattered light returned from the target to the detector. We demonstrate a method of increasing the signal returned to the detector by illuminating the target with a number of independently controlled beams, where both the position and phase are optimised. We show an improvement in the backscattered signal that is proportional to the number of beams used. The method is demonstrated within a laser microphone, measuring audio signal due to vibrations in surfaces, showing a significant improvement in the signal-to-noise of the measurement.
Item Type: | Articles |
---|---|
Additional Information: | Funding: Engineering and Physical Sciences Research Council (EP/M01326X/1, EP/S026444/1); Defence Science and Technology Laboratory. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Padgett, Professor Miles and Johnson, Dr Steven and O'Donnell, Laura |
Authors: | O'Donnell, L., Padgett, M. J., and Johnson, S. D. |
College/School: | College of Science and Engineering College of Science and Engineering > School of Physics and Astronomy |
Journal Name: | Optics Express |
Publisher: | Optical Society of America |
ISSN: | 1094-4087 |
ISSN (Online): | 1094-4087 |
Copyright Holders: | Copyright © 2021 The Optical Society |
First Published: | First published in Optics Express 29(6):8770-8776 |
Publisher Policy: | Reproduced under a Creative Commons License |
University Staff: Request a correction | Enlighten Editors: Update this record