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Proceedings Paper

A simple and robust optical scheme for self-mixing low-coherence flowmeters
Author(s): Stefano Cattini; Luigi Rovati
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Paper Abstract

The developed measuring system is based on a low-coherence source and a self-mixing (or internal) detection. The proposed optical layout exploits the reflection from the internal wall of the duct as reference arm, thus reducing system complexity, cost, size and increasing its robustness to movements of the measurand. Moreover, the usage of a low-coherence source allows reducing the problems related to the poor definition of the volume under test (sensing region or measurement volume) typical of “coherent” self-mixing systems. Although preliminary analysis have been performed by simply investigating the frequencies relative to the maximum in the Doppler spectrum, the obtained results demonstrates that by increasing scatterers concentration of +300%, the system sensitivity increases of about only +20%.

Paper Details

Date Published: 28 February 2014
PDF: 10 pages
Proc. SPIE 8951, Optical Diagnostics and Sensing XIV: Toward Point-of-Care Diagnostics, 895102 (28 February 2014); doi: 10.1117/12.2035962
Show Author Affiliations
Stefano Cattini, Univ. degli Studi di Modena e Reggio Emilia (Italy)
Luigi Rovati, Univ. degli Studi di Modena e Reggio Emilia (Italy)


Published in SPIE Proceedings Vol. 8951:
Optical Diagnostics and Sensing XIV: Toward Point-of-Care Diagnostics
Gerard L. Coté, Editor(s)

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