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Fiber optic displacement sensing monitored by an OTDR and referenced by Fresnel reflection and by fiber Bragg gratings

✍ Scribed by S. Mendonça; O. Frazão; J. M. Baptista; J. L. Santos

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 262 KB
Volume: 49
Category: Article
ISSN: 0895-2477
DOI: 10.1002/mop.22261

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✦ Synopsis

Abstract

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

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