Optimising backscatter from multiple beam interference

Tools

O'Donnell, Laura and Padgett, Miles J. and Johnson, Steven D. (2021) Optimising backscatter from multiple beam interference. Optics Express, 29 (6). pp. 8770-8776. ISSN 1094-4087 (https://doi.org/10.1364/OE.420384)

[thumbnail of Optimising-backscatter-from-multiple-beam-interference]
Preview
 Text. Filename: Optimising-backscatter-from-multiple-beam-interference.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo
Download (4MB)| Preview

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.

ORCID iDs

O'Donnell, Laura, Padgett, Miles J. and Johnson, Steven D. ORCID logoORCID: https://orcid.org/0000-0002-6181-8303;
  • Item type:Article
    ID code:89749
    Dates:
    Date
    Event
    15 March 2021
    Published
    5 March 2021
    Published Online
    26 February 2021
    Accepted
    Subjects:Science > Physics > Optics. Light
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:27 Jun 2024 13:35
    Last modified:11 Nov 2024 14:22
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/89749
CORE (COnnecting REpositories)