RIKESH PATEL RIKESH.PATEL@NOTTINGHAM.AC.UK
Assistant Professor
Widefield two laser interferometry
Patel, Rikesh; Achamfuo-Yeboah, Samuel; Light, Roger A.; Clark, Matt
Authors
Samuel Achamfuo-Yeboah
Roger A. Light
MATT CLARK matt.clark@nottingham.ac.uk
Professor of Applied Optics
Abstract
A novel system has been developed that can capture the wide- field interference pattern generated by interfering two independent and incoherent laser sources. The interferograms are captured using a custom CMOS modulated light camera (MLC) which is capable of demodulating light in the megahertz region. Two stabilised HeNe lasers were constructed in order to keep the optical frequency difference (beat frequency) between the beams within the operational range of the camera.
This system is based on previously reported work of an ultrastable heterodyne interferometer [Opt. Express 20, 17722 (2012)]. The system used an electronic feedback system to mix down the heterodyne signal captured at each pixel on the camera to cancel out the effects of time varying piston phase changes observed across the array. In this paper, a similar technique is used to track and negate the effects of beat frequency variations across the two laser pattern. This technique makes it possible to capture the full field interferogram caused by interfering two independent lasers even though the beat frequency is effectively random.
As a demonstration of the system’s widefield interferogram capture capability, an image of a phase shifting object is taken using a very simple two laser interferometer.
Citation
Patel, R., Achamfuo-Yeboah, S., Light, R. A., & Clark, M. (2014). Widefield two laser interferometry. Optics Express, 22(22), https://doi.org/10.1364/OE.22.027094
Journal Article Type | Article |
---|---|
Acceptance Date | Oct 8, 2014 |
Publication Date | Oct 23, 2014 |
Deposit Date | Jul 18, 2017 |
Publicly Available Date | Jul 18, 2017 |
Journal | Optics Express |
Electronic ISSN | 1094-4087 |
Publisher | Optical Society of America |
Peer Reviewed | Peer Reviewed |
Volume | 22 |
Issue | 22 |
DOI | https://doi.org/10.1364/OE.22.027094 |
Public URL | https://nottingham-repository.worktribe.com/output/737752 |
Publisher URL | https://www.osapublishing.org/oe/abstract.cfm?uri=oe-22-22-27094 |
Additional Information | © 2014 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited. |
Contract Date | Jul 18, 2017 |
Files
pap4.pdf
(449 Kb)
PDF
You might also like
Widefield heterodyne interferometry using a custom CMOS modulated light camera
(2011)
Journal Article
Ultrastable heterodyne interferometer system using a CMOS modulated light camera
(2012)
Journal Article
Widefield ultrastable heterodyne interferometry using a custom CMOS modulated light camera
(2011)
Presentation / Conference Contribution
Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces
(2017)
Journal Article
Downloadable Citations
About Repository@Nottingham
Administrator e-mail: discovery-access-systems@nottingham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search