Fabry–Pérot Fiber Sensor for Simultaneous Measurement of Refractive Index and Temperature Based on an In-Fiber Ellipsoidal Cavity

Author

Wang, Tingting ; Wang, Ming

Volume

24

Issue

19

fYear

2012

Firstpage

1733

Lastpage

1736

Abstract

A Fabry-Pérot fiber sensor for the simultaneous measurement of refractive index (RI) and temperature based on an in-fiber ellipsoidal cavity is proposed. The sensor head consists of an ellipsoidal air-microcavity, which is formed by splicing together a single-mode fiber and a photonic crystal fiber with a simple arc-discharge technique. The external RI is determined through the analysis of the fast Fourier transform. The sensor is also capable of simultaneous measurement of temperature by tracking the wavelength shift. Easy fabrication, low-cost, and high-contrast make it appropriate for practical application.

Keywords

Fabry-Perot interferometers; Fourier transform optics; arcs (electric); fast Fourier transforms; fibre optic sensors; holey fibres; micro-optics; microcavities; microsensors; optical fibre fabrication; optical fibre testing; photonic crystals; refractive index measurement; temperature measurement; Fabry-Perot fiber sensor; arc-discharge technique; ellipsoidal air-microcavity; fast Fourier transform; in-fiber ellipsoidal cavity; photonic crystal fiber; refractive index measurement; sensor head; single-mode fiber; temperature measurement; wavelength shift; Cavity resonators; Optical fiber sensors; Reflection; Refractive index; Sensitivity; Temperature measurement; Temperature sensors; Fabry–Pérot interferometers; fiber sensors; photonic crystal fiber; refractive index (RI);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2212184

Filename

6262456