Modeling of light intensity-modulated fiber-optic displacement sensors

Panagiotis Polygerinos, Lakmal D. Seneviratne, Kaspar Althoefer

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


Light-intensity-modulated displacement sensors are currently extensively used in numerous applications. Most such sensors operate by utilizing a pair of adjacent optical fibers and a reflector. This scheme can provide a good sensing outcome, but its performance can be enhanced with the use of only a single optical fiber. Such displacement sensors have the benefits of higher sensitivity and operating range, because they can efficiently collect more light after a reflectance has occurred. Hence, this paper investigates a single optical fiber that emits and collects light while translating and rotating with respect to the main axis of the optical fiber. The Gaussian light-sensing behavior of these two cases is mathematically modeled, giving sensing characteristics such as linearity and sensitivity. Experimental results are presented for verification and validation of the models.

Original languageEnglish (US)
Article number5613937
Pages (from-to)1408-1415
Number of pages8
JournalIEEE Transactions on Instrumentation and Measurement
Issue number4
StatePublished - Apr 2011
Externally publishedYes


  • Displacement sensor
  • fiber-optic displacement sensor
  • fiber-optic sensor
  • intensity-modulated sensor
  • reflective intensity modulation

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering


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