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dc.contributor.authorYáñez Alvarado, Carlos René
dc.contributor.authorAzcona Guerrero, Francisco Javier
dc.contributor.authorRoyo Royo, Santiago
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Enginyeria Òptica
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Òptica i Optometria
dc.identifier.citationYañez, C.; Azcona, F.; Royo, S. Confocal flowmeter based on self-mixing interferometry for real-time velocity profiling of turbid liquids flowing in microcapillaries. "Optics express", 19 Agost 2019, vol. 27, núm. 17, p. 24340-24352.
dc.description.abstractWe propose a new confocal device for flow profiling in microcapillaries. A viewfinder system is developed using a visible light microscope, allowing focusing with high precision an 830 nm Fabry-Perot laser diode on a microchannel. By means of a novel confocal approach, the Doppler shift produced by the particles of a turbid liquid moving in the focal plane can be measured in real time using the well-known self-mixing effect. The resolution of this device is characterized in function of the full width at half maximum of the Gaussian frequency peak related to the self-mixing signal in the frequency domain. Velocity measurements for flow rates from 0.2 to 1.6 mL/min are presented, and the results demonstrate that the method reduces the phase noise and the effects of the out-of-focus particles, allowing straightforward flow profiling in microchannel structures
dc.format.extent13 p.
dc.subjectÀrees temàtiques de la UPC::Ciències de la visió::Òptica física
dc.subject.lcshLaser interferometry
dc.subject.lcshFlow meters
dc.subject.otherDoppler effect
dc.subject.otherFiber lasers
dc.subject.otherLaser beams
dc.subject.otherLaser sources
dc.subject.otherOptical components
dc.subject.otherOptical feedback
dc.titleConfocal flowmeter based on self-mixing interferometry for real-time velocity profiling of turbid liquids flowing in microcapillaries
dc.subject.lemacInterferometria làser
dc.subject.lemacFluids -- Mesurament
dc.contributor.groupUniversitat Politècnica de Catalunya. GREO - Grup de Recerca en Enginyeria Òptica
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorYañez, C.; Azcona, F.; Royo, S.
local.citation.publicationNameOptics express

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