Research on optical fiber magnetic field sensors based on multi-mode fiber and spherical structure

A magnetic field sensor with a magnetic fluid（MF）-coated intermodal interferometer is proposed and experimentally demonstrated. The interferometer is formed by sandwiching a segment of single mode fiber（SMF） between a segment of multi-mode fiber（MMF） and a spherical structure. It can be considered a...

Full description

Saved in:
Bibliographic Details
Published in:Optoelectronics letters 2017, Vol.13 (1), p.16-20
Main Author: 王艳 童峥嵘 张卫华 栾盼盼 赵月 薛力芳
Format: Article
Language:English
Subjects:
Interference
Interferometers
Intermodal
Lasers
Magnetic fields
Magnetic fluids
Magnetism
Optical Devices
Optical fibers
Optics
Photonics
Physics
Physics and Astronomy
Segments
Transmission loss
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A magnetic field sensor with a magnetic fluid（MF）-coated intermodal interferometer is proposed and experimentally demonstrated. The interferometer is formed by sandwiching a segment of single mode fiber（SMF） between a segment of multi-mode fiber（MMF） and a spherical structure. It can be considered as a cascade of the traditional SMF-MMF-SMF structure and MMF-SMF-sphere structure. The transmission spectral characteristics change with the variation of applied magnetic field. The experimental results exhibit that the magnetic field sensitivities for wavelength and transmission loss are 0.047 nm/m T and 0.215 d B/m T for the interference dip around 1 535.36 nm. For the interference dip around 1548.41 nm,the sensitivities are 0.077 nm/m T and 0.243 d B/m T. Simultaneous measurement can be realized according to the different spectral responses.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-017-6195-6