Title :
Fabry–Pérot Fiber Sensor for Simultaneous Measurement of Refractive Index and Temperature Based on an In-Fiber Ellipsoidal Cavity
Author :
Wang, Tingting ; Wang, Ming
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);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2012.2212184
