An All-Fiber Optic Current Sensor Based on Ferrofluids and Multimode Interference

Author

Lin Li ; Qun Han ; Yaofei Chen ; Tiegen Liu ; Rongxiang Zhang

Author_Institution

Key Lab. of Opto-Electron. Inf. Technol., Tianjin Univ., Tianjin, China

Volume

14

Issue

6

fYear

2014

fDate

Jun-14

Firstpage

1749

Lastpage

1753

Abstract

In this paper, an all-fiber optical current sensor based on ferrofluids and a singlemode-multimode-singlemode structure (SMS) with a piece of no-core fiber as the multimode section was proposed and experimentally investigated. The transmittance of the SMS that is sealed in a capillary with ferrofluids is highly sensitive to the surrounding magnetic field. Because the strength of the magnetic field is proportional to the current in the electric line, so the current can be measured. A demonstration sensor was fabricated and experimentally characterized. A sensitivity of 2.12 dB/A was achieved.

Keywords

electric current measurement; electric sensing devices; fibre optic sensors; light interference; magnetic field measurement; magnetic fluids; magnetic sensors; SMS; all-fiber optic current sensor; current measurement; electric line; ferrofluid; magnetic field strength; multimode interference; no-core fiber; singlemode-multimode-singlemode structure; Educational institutions; Magnetic fields; Magnetic sensors; Optical fiber sensors; Optical fibers; Fiber optics sensors; all-optical devices; fiber optics; magneto-optical materials;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2014.2302812

Filename

6725606