Micro-displacement measurement using a long period fiber grating in a self-referenced fiber optic intensity sensor

Author

Cazacu, S. ; Martins, J.M. ; Rego, G. ; Santos, S.F. ; Santos, J.L. ; Baptista, J.M.

Author_Institution

Dep. de Engenharia Electrotecnica, Inst. Superior de Engenharia do Porto, Portugal

Volume

1

fYear

2004

fDate

7-11 Nov. 2004

Firstpage

262

Abstract

This work describes a sensor, in which the sensing head comprises a long period fiber grating (LPG) whose attenuation peak varies as function of its bending. The level of LPG bending is induced by the displacement of a micrometer translation stage (MTS) being possible therefore to measure microdisplacements. The sensing head is integrated in a fiber optic intensity sensor, referenced in frequency, which is immune to intensity fluctuations other than the ones caused by the LPG.

Keywords

diffraction gratings; displacement control; displacement measurement; fibre optic sensors; optical fibre fabrication; LPG bending; fiber optic intensity sensor; long period fiber grating; microdisplacement measurement; micrometer translation stage; Chemical sensors; Electrical resistance measurement; Electromagnetic measurements; Fiber gratings; Light emitting diodes; Optical attenuators; Optical fiber sensors; Optical fibers; Optical sensors; Sensor phenomena and characterization;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Society, 2004. LEOS 2004. The 17th Annual Meeting of the IEEE

Print_ISBN

0-7803-8557-8

Type

conf

DOI

10.1109/LEOS.2004.1363211

Filename

1363211