Multimode interference-based fiber-optic displacement sensor

Author

Mehta, Alok ; Mohammed, Waleed ; Johnson, Eric G.

Author_Institution

Sch. of Opt./CREOL, Univ. of Central Florida, Orlando, FL, USA

Volume

15

Issue

8

fYear

2003

Firstpage

1129

Lastpage

1131

Abstract

A new concept for a multimode interference-based fiber-optic displacement sensor is investigated both theoretically and experimentally. By applying multimode interference and reimaging theory to optical fibers, a displacement sensor consisting of only a section of multimode fiber fusion spliced to a single-mode fiber can be readily fabricated. Observation and analysis of the power reflected off of a surface and back through the device over a finite wavelength range provides enough information to use the device as a calibrated displacement sensor over a large displacement range.

Keywords

calibration; displacement measurement; fibre optic sensors; finite difference methods; optical fibre fabrication; optical fibre theory; calibrated displacement sensor; displacement sensor; finite wavelength range; fusion spliced; large displacement range; multimode fiber; multimode interference; multimode interference-based fiber-optic displacement sensor; optical fibre fabrication; reimaging theory; single-mode fiber; Information analysis; Interference; Mirrors; Optical fiber devices; Optical fiber polarization; Optical fiber sensors; Optical fiber theory; Optical fibers; Optical sensors; Sensor fusion;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2003.815338

Filename

1215526