Sensitivity coefficient evaluation of an embedded fiber-optic strain sensor

Libo Yuan, Li Min Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

39 Citations (Scopus)


A simple model is developed for evaluating the interaction between the surrounding matrix and a length of optical fiber embedded in it. The analysis has been performed for nominal uniform pull-stress applied to the matrix, in which a sensitivity coefficient K(L) is used to describe the percentage of strain applied to the composite actually transferred to the fiber. The theoretical results have shown that the sensitivity coefficient of the fiber-optic strain sensor depends on the embedded length of the optical fiber and the material properties of the fiber coating. The general trend of increasing the sensitivity coefficient with increasing action length has been confirmed by the experimental results. The distributions of interfacial shearing stress between matrix and coating and coating and glass fiber are given. Experiments have been performed using a white-light fiber-optic interferometer.
Original languageEnglish
Pages (from-to)5-11
Number of pages7
JournalSensors and Actuators, A: Physical
Issue number1
Publication statusPublished - 30 Jun 1998


  • Embedded fibers
  • Fiber-optic interferometers
  • Fiber-optic sensors
  • Matrix materials
  • Sensitivity coefficient
  • Strain sensors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering


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