Eyal Preter (Author), Borut Preložnik (Author), Vlada Artel (Author), Chaim Sukenik (Author), Denis Đonlagić (Author), Avi Zadok (Author)

Abstract

Fiber-optic sensors provide remote access, are readily embedded within structures, and can operate in harsh environments. Nevertheless, fiber-optic sensing of liquids has been largely restricted to measurements of refractive index and absorption spectroscopy. The temporal dynamics of fluid evaporation have potential applications in monitoring the quality of water, identificationof fuel dilutions, mobile point-of-care diagnostics, climatography and more. In this work, the fiber-optic monitoring of fluids evaporation is proposed and demonstrated. Sub-nano-liter volumes of a liquid are applied to inline fiber-optic micro-cavities. As the liquid evaporates, light is refracted out of the cavity at the receding index boundary between the fluid and the ambient surroundings. A sharp transient attenuation in the transmission of light through the cavity, by as much as 50 dB and on a sub-second time scale, is observed. Numerical models for the transmission dynamics in terms of ray-tracing and wavefront propagation are provided. Experiments show that the temporal transmission profile can distinguish between different liquids.

Keywords

optični vlakenski senzorji;optične mikro celice;fiber-optic sensors;opto-fluidics;evaporation monitoring;optical micro-cells;fiber cavities;droplet analysis;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FERI - Faculty of Electrical Engineering and Computer Science
UDC: 681.5
COBISS: 17365526 Link will open in a new window
ISSN: 1424-8220
Views: 694
Downloads: 290
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Other data

Secondary language: Slovenian
Secondary keywords: optični vlakenski senzorji;optične mikro celice;
URN: URN:SI:UM:
Type (COBISS): Scientific work
Pages: str. 15261-15273
Volume: ǂVol. ǂ13
Issue: ǂno. ǂ11
Chronology: 2013
DOI: 10.3390/s131115261
ID: 10844047