Spectrometer-based refractive index and dispersion measurement using low-coherence interferometry with confocal scanning

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dc.contributor.authorFrancis, Daniel
dc.contributor.authorFord, Helen D.
dc.contributor.authorTatam, Ralph P.
dc.date.accessioned2018-04-19T17:21:57Z
dc.date.available2018-04-19T17:21:57Z
dc.date.issued2018-02-02
dc.description.abstractThis paper describes a technique for measuring refractive index and thickness of transparent plates using a fibre-optic low-coherence interferometer. The interferometer is used to independently measure quantities related to the phase and group refractive indices, np and ng, of the material under investigation. Additionally, the dispersion of the phase index dependent quantity is measured by taking advantage of the range of wavelengths available from a broadband source. These three quantities are related to simultaneously yield np and ng as well as the geometrical thickness t of the sample. Measurements are presented for a range of transparent materials including measurements of the ordinary and extraordinary refractive indices of a birefringent sapphire window. The mean percentage errors across all the samples tested were 0.09% for np, 0.08% for np, and 0.11% for t.en_UK
dc.identifier.citationDaniel Francis, Helen D. Ford and Ralph P. Tatam. Spectrometer-based refractive index and dispersion measurement using low-coherence interferometry with confocal scanning. Optics Express, 2018, Vol. 26, Issue 3, pp. 3604-3617en_UK
dc.identifier.cris19579597
dc.identifier.issn1094-4087
dc.identifier.urihttps://doi.org/10.1364/OE.26.003604
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/13155
dc.language.isoenen_UK
dc.publisherOSAen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleSpectrometer-based refractive index and dispersion measurement using low-coherence interferometry with confocal scanningen_UK
dc.typeArticleen_UK

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