Simultaneous Measurement of Temperature and Curvature Based on Hollow Annular Core Fiber

Author

Yaxun Zhang ; Ai Zhou ; Boyang Qin ; Quan Xu ; Zhihai Liu ; Jun Yang ; Libo Yuan

Author_Institution

Key Lab. of In-fiber Integrated Opt., Harbin Eng. Univ., Harbin, China

Volume

26

Issue

11

fYear

2014

fDate

1-Jun-14

Firstpage

1128

Lastpage

1131

Abstract

We propose a simultaneous temperature and curvature sensor based on a hollow annular core fiber (HACF) Mach-Zehnder interferometer (MZI). The MZI is fabricated by inserting a short section of HACF between two short pieces of multimode fibers, and interference occurs between the light beams transmitting along the air hole and annular core of the HACF. Curvature and temperature can be measured through fringe visibility variation and wavelength shift of the interference spectrum, respectively. The experimental results show that the temperature sensitivity is 30 pm/°C in the range of 30°C-100°C, and the maximum visibility variation is 32.4 dB from 0.555 to 5.405 m^-1. In addition, the device is insensitive to external refractive index.

Keywords

Mach-Zehnder interferometers; curvature measurement; fibre optic sensors; light interference; temperature measurement; Mach-Zehnder interferometer; air hole; curvature measurement; fringe visibility variation; hollow annular core fiber; interference spectrum; light beams; multimode fibers; refractive index; temperature 30 degC to 100 degC; temperature measurement; wavelength shift; Interference; Optical fiber sensors; Optical fibers; Temperature measurement; Temperature sensors; Optical fiber sensors; curvature; interferometer; temperature;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2316532

Filename

6786339