Exhaled breath optical fiber sensor based on LMRs for respiration monitoring

Author

Sanchez, P. ; Zamarreno, C.R. ; Zamarreo, C.R. ; Hernaez, M. ; Matias, I.R. ; Arregui, F.J.

Author_Institution

Dept. of Electr. & Electron. Eng., Public Univ. of Navarra, Pamplona, Spain

fYear

2014

fDate

2-5 Nov. 2014

Firstpage

1142

Lastpage

1145

Abstract

In this work, the fabrication and characterization of a small and portable exhaled breath sensor based on Lossy Mode Resonances (LMR) is presented. Tin oxide (SnO₂) coatings fabricated onto optical fibers are used as LMR supporting coatings. The principle of operation is based on the measurement of refractive index changes by the LMR device (with an average sensitivity of 8355 nm/RIU) originated by the condensation of micro water droplets in the surroundings of the SnO₂ coating during the breath natural process. The sensor shows a repetitive response with less than 100 ms of response time and a wavelength shift of 150 nm from inhalation to exhalation.

Keywords

bio-optics; fibre optic sensors; pneumodynamics; refractive index; tin compounds; LMR supporting coatings; Lossy Mode Resonances; SnO₂; exhaled breath optical fiber sensor; refractive index change; respiration monitoring; tin oxide coatings; Coatings; Monitoring; Optical fiber sensors; Optical fibers; Refractive index; Sensitivity; Sputtering; Breath sensor; LMR; Optical fiber; Sputtering; Tin Oxide;

fLanguage

English

Publisher

ieee

Conference_Titel

SENSORS, 2014 IEEE

Conference_Location

Valencia

Type

conf

DOI

10.1109/ICSENS.2014.6985209

Filename

6985209