Frequency division multiplexing for interferometric planar Doppler velocimetry

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dc.contributor.authorCharrett, Thomas O. H.
dc.contributor.authorBledowski, Ian A.
dc.contributor.authorJames, Stephen W.
dc.contributor.authorTatam, Ralph P.
dc.date.accessioned2016-06-01T10:49:52Z
dc.date.available2016-06-01T10:49:52Z
dc.date.issued2014-05-30
dc.description.abstractA new method of acquiring simultaneously the signal and reference channels used for interferometric planar Doppler velocimetry is proposed and demonstrated. The technique uses frequency division multiplexing (FDM) to facilitate the capture of the requisite images on a single camera, and is suitable for time-averaged flow measurements. Furthermore, the approach has the potential to be expanded to allow the multiplexing of additional measurement channels for multicomponent velocity measurement. The use of FDM for interferometric referencing is demonstrated experimentally with measurements of a single velocity component of a seeded axisymmetric air jet. The expansion of the technique to include multiple velocity components was then investigated theoretically and experimentally to account for bandwidth, crosstalk, and dynamic range limitations. The technique offers reduced camera noise, automatic background light suppression, and crosstalk levels of typically <10%. Furthermore, as this crosstalk is dependent upon the channel modulations applied, it can be corrected for in postprocessing.en_UK
dc.identifier.citationCharrett TOH, Bledowski IA, James SW, Tatam RP. (2014) Frequency division multiplexing for interferometric planar Doppler velocimetry. Applied Optics, Volume 53, Issue 20, July 2014, pp. 4363-4374en_UK
dc.identifier.cris6056002
dc.identifier.issn1559-128X
dc.identifier.urihttp://dx.doi.org/10.1364/AO.53.004363
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/9923
dc.language.isoenen_UK
dc.publisherOptical Society of Americaen_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 3.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/
dc.titleFrequency division multiplexing for interferometric planar Doppler velocimetryen_UK
dc.typeArticleen_UK

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