Optical fiber temperature sensor based on a microcavity with polymer overlay

Optics Express
Iván Hernández-RomanoJoel Villatoro

Abstract

An ultracompact, cost-effective, and highly accurate fiber optic temperature sensor is proposed and demonstrated. The sensing head consists of Fabry-Perot microcavity formed by an internal mirror made of a thin titanium dioxide (TiO2) film and a microscopic segment of single-mode fiber covered with Poly(dimethylsiloxane) (PDMS). Due to the high thermo-optic coefficient of PDMS the reflectance of the fiber-PDMS interface varies strongly with temperature which in turn modifies the amplitude of the interference pattern. To quantify the changes of the latter we monitored the visibility of the interference pattern and analyzed it by means of the fast Fourier transform. Our sensor exhibits linear response, high sensitivity, and response time of 14 seconds. We believe that the microscopic dimensions along with the performance of the sensor here presented makes it appealing for sensing temperature in PDMS microfluidic circuits or in biological applications.

References

Nov 10, 2004·Journal of Biomedical Materials Research. Part a·Sophie L PetersonDarryl Y Sasaki
Jul 28, 2006·Nature·George M Whitesides
Jul 28, 2006·Nature·Dirk JanasekAndreas Manz
Jul 28, 2006·Nature·Paul YagerBernhard H Weigl
May 23, 2007·Biomedical Microdevices·Abel L ThangawngMatthew R Glucksberg
Nov 1, 1989·Optics Letters·C E LeeE Udd
Jul 14, 2012·Reports on Progress in Physics·Ralf SeemannStephan Herminghaus

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Citations

Mar 25, 2020·Biomedical Optics Express·Mildred S Cano-VelázquezJuan Hernández-Cordero
Apr 15, 2020·Sensors·Paulo RorizSusana Novais
Jan 25, 2017·Scientific Reports·Guang QianTong Zhang

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