Open AccessAntiresonant mechanism based self-temperature-calibrated fiber optic Fabry–Perot gas pressure sensors
Author(s) -
Hong Gao,
Yi Jiang,
Liuchao Zhang,
Yang Cui,
Yuan Jiang,
Jinhua Jia,
Lan Jiang
Publication year - 2019
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.022181
Subject(s) - materials science , optics , fabry–pérot interferometer , cladding (metalworking) , interferometry , fiber optic sensor , temperature measurement , optical fiber , femtosecond , pressure measurement , pressure sensor , single mode optical fiber , wavelength , laser , optoelectronics , physics , quantum mechanics , meteorology , thermodynamics , metallurgy
A self-temperature-calibrated gas pressure sensor with a sandwich structure made of single-mode fiber (SMF)-hollow core fiber (HCF)-SMF is proposed and experimentally demonstrated. A Fabry-Perot interferometer (FPI) is formed by the SMF-HCF-SMF structure along the axial direction, and an antiresonant reflecting optical waveguide (ARROW) is formed by the ring-cladding of the HCF along the radial direction. A micro-channel is drilled on the ring-cladding of the HCF using a femtosecond laser to facilitate air entering/exiting the HCF. The FPI functions as the pressure sensor, and the ARROW functions as the temperature sensor. The initial wavelength and pressure sensitivity of the FPI can be calibrated from the temperature obtained by measuring the optical thickness of the ARROW. The experimental results show that the ARROW exhibits a temperature sensitivity of ~0.584 nm/°C, and the pressure sensitivity of the FPI ranges from 3.884 to 0.919 nm/MPa, within the temperature range of 37-1007 °C. The simplicity and durability of the sensor make it suitable for reliable gas pressure measurement in high-temperature environments.