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Fiber optic displacement sensing monitored by an OTDR and referenced by Fresnel reflection and by fiber Bragg gratings
Author(s) -
Mendonça S.,
Frazão O.,
Baptista J. M.,
Santos J. L.
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22261
Subject(s) - fiber bragg grating , optical time domain reflectometer , optics , phosfos , fiber optic sensor , materials science , displacement (psychology) , fresnel equations , optical fiber , reflection (computer programming) , polarization maintaining optical fiber , physics , refractive index , computer science , psychology , psychotherapist , programming language
This work presents a study of displacement sensing based on a fiber eight geometry shape monitored by an optical time domain reflectometer. The displacement sensor is referenced by Fresnel reflection or by a fiber Bragg grating structure located after the sensor. One of the advantages of the fiber Bragg grating as referencing device is its capability to be multiplexed by a number of displacement sensors in series along the optical fiber. This concept is also demonstrated using two Bragg gratings. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 768–770, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22261