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dc.contributor.authorFacchin, Morgan
dc.contributor.authorBruce, Graham David
dc.contributor.authorDholakia, Kishan
dc.date.accessioned2020-05-12T11:30:23Z
dc.date.available2020-05-12T11:30:23Z
dc.date.issued2020-05-15
dc.identifier267189053
dc.identifierbff69f86-a3f9-4b3a-9354-4d617a5ade51
dc.identifier000534639500021
dc.identifier85088864502
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 . https://doi.org/10.1364/OSAC.394117en
dc.identifier.issn2578-7519
dc.identifier.otherORCID: /0000-0003-3403-0614/work/74117938
dc.identifier.urihttps://hdl.handle.net/10023/19920
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.format.extent12
dc.format.extent858807
dc.language.isoeng
dc.relation.ispartofOSA Continuumen
dc.subjectSpeckleen
dc.subjectPolarisationen
dc.subjectStokes parametersen
dc.subjectQC Physicsen
dc.subjectT Technologyen
dc.subjectDASen
dc.subject.lccQCen
dc.subject.lccTen
dc.titleSpeckle-based determination of the polarisation state of single and multiple laser beamsen
dc.typeJournal articleen
dc.contributor.sponsorThe Leverhulme Trusten
dc.contributor.sponsorEPSRCen
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.identifier.doi10.1364/OSAC.394117
dc.description.statusPeer revieweden
dc.identifier.urlhttps://arxiv.org/abs/2003.14408en
dc.identifier.grantnumberRPG-2017-197en
dc.identifier.grantnumberEP/P030017/1en


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