Title :
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
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;
Conference_Titel :
Lasers and Electro-Optics Society, 2004. LEOS 2004. The 17th Annual Meeting of the IEEE
Print_ISBN :
0-7803-8557-8
DOI :
10.1109/LEOS.2004.1363211
