title: Distributed strain measurements using fiber Bragg gratings in small-diameter optical fiber and low-coherence reflectometry.
abstract: Optical low coherence reflectometry and fiber Bragg gratings written in small diameter (50 micrometer) optical fibers were used for measurements of non-homogenous internal strain fields inside an epoxy specimen with sub-grating length resolution. The results were compared with measurements using Fiber Bragg gratings in standard size (125 micrometer) single mode fibers and show that smaller fibers are less intrusive at stress heterogeneities.
authors.affiliation: Ecole Polytechnique Fédérale de Lausanne, EPFL, Laboratoire de Mécanique Appliquée et d’Analyse de Fiabilité CH-1015 Lausanne, Switzerland.
authors.forename: Dragan
authors.initials: D
authors.lastname: Coric
authors.forename: Marco
authors.initials: M
authors.lastname: Lai
authors.forename: John
authors.initials: J
authors.lastname: Botsis
authors.forename: Aiping
authors.initials: A
authors.lastname: Luo
authors.forename: Hans G
authors.initials: HG
authors.lastname: Limberger
mesh_terms: D055119:Elastic Modulus; D004853:Epoxy Resins / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008422:Materials Testing / Q000295:instrumentation*; D008904:Miniaturization; D010783:Photometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers
chemical_list: D004853:Epoxy Resins