Title :
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
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;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2014.2302812
