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dc.contributor.authorFacchin, Morgan
dc.contributor.authorBruce, Graham David
dc.contributor.authorDholakia, Kishan
dc.identifier.citationFacchin , M , Bruce , G D & Dholakia , K 2020 , ' Speckle-based determination of the polarisation state of single and multiple laser beams ' , OSA Continuum , vol. 3 , no. 5 , pp. 1302-1313 .
dc.identifier.otherPURE: 267189053
dc.identifier.otherPURE UUID: bff69f86-a3f9-4b3a-9354-4d617a5ade51
dc.identifier.otherORCID: /0000-0003-3403-0614/work/74117938
dc.identifier.otherWOS: 000534639500021
dc.identifier.otherScopus: 85088864502
dc.descriptionFunding: Leverhulme Trust (RPG-2017-197); UK Engineering and Physical Sciences Research Council (EP/P030017/1).en
dc.description.abstractLaser speckle is generated by the multiple interference of light through a disordered medium. Here we study the premise that the speckle pattern retains information about the polarisation state of the incident field. We analytically verify that a linear relation exists between the Stokes vector of the light and the resulting speckle pattern. As a result, the polarisation state of a beam can be measured from the speckle pattern using a transmission matrix approach. We perform a quantitative analysis of the accuracy of the transmission matrix method to measure randomly time-varying polarisation states. In experiment, we find that the Stokes parameters of light from a diode laser can be retrieved with an uncertainty of 0.05 using speckle images of 150$\times$150 pixels and 17 training states. We show both analytically and in experiment that this approach may be extended to the case of more than one laser field, demonstrating the measurement of the Stokes parameters of two laser beams simultaneously from a single speckle pattern and achieving the same uncertainty of 0.05.
dc.relation.ispartofOSA Continuumen
dc.rightsCopyright © 2020 the Author(s). Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.en
dc.subjectStokes parametersen
dc.subjectQC Physicsen
dc.subjectT Technologyen
dc.titleSpeckle-based determination of the polarisation state of single and multiple laser beamsen
dc.typeJournal articleen
dc.contributor.sponsorThe Leverhulme Trusten
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Centre for Biophotonicsen
dc.contributor.institutionUniversity of St Andrews. Sir James Mackenzie Institute for Early Diagnosisen
dc.contributor.institutionUniversity of St Andrews. Biomedical Sciences Research Complexen
dc.description.statusPeer revieweden

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