Open AccessSimultaneous temperature and force measurement using Fabry-Perot interferometer and bandgap effect of a fluid-filled photonic crystal fiber
Author(s) -
Tingting Han,
Yange Liu,
Zhi Wang,
Zhifang Wu,
Shuangxia Wang,
Shuo Li
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.013320
Subject(s) - optics , materials science , photonic crystal fiber , interferometry , fusion splicing , photonic crystal , fabry–pérot interferometer , interference (communication) , optoelectronics , refractive index , fiber , sensitivity (control systems) , photonic bandgap , optical fiber , physics , wavelength , channel (broadcasting) , electrical engineering , electronic engineering , composite material , engineering
A novel fiber sensor capable of simultaneously measuring force and temperature is proposed and investigated. A section of high-index-fluid-filled photonic bandgap fiber (HIFF-PBGF) is inserted in a fiber loop to act as the sensing head. Photonic bandgap effect of the HIFF-PBGF as well as Fabry-Perot interferometer (FPI) introduced by controlling the splicing between the HIFF-PBGF and single mode fiber is used for achieving force and temperature discrimination. Taking advantage of the bandgap being high sensitivity to the temperature, a high temperature sensitivity of more than -1.94 dB/°C is achieved, which is the highest based on the intensity measurement, to our best knowledge. Meanwhile, a force sensitivity of 3.25 nm/N (~3.9 pm/με) is obtained, which could be enhanced by controlling the FPI shape. The device also has the strong points of easy fabrication, compact structure and high interference fringe contrast.