Enhanced Multiplexing Capacity of Low-Coherence Reflectometric Sensors Based on a Loop Topology

Libo Yuan, Wei Jin, Li Min Zhou, Y. L. Hoo, M. S. Demokan

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review


A novel scheme for enhancing the multiplexing capacity of low-coherence reflectometric sensors is demonstrated. The scheme is based on connecting the sensing elements in serial in a loop configuration, allowing each of the sensors within the array being interrogated twice from opposite directions. The bi-directional interrogation doubles the multiplexing capacity while maintains the signal to noise ratio. The double interrogation scheme would allow the normal operation of the sensor array even when one end of the transmission fiber were broken, improving the reliability of the sensing system for large-scale structural monitoring.
Original languageEnglish
Title of host publicationProceedings of IEEE Sensors
Number of pages6
Publication statusPublished - 1 Dec 2002
EventFirst IEEE International Conference on Sensors - IEEE Sensors 2002 - Orlando, FL, United States
Duration: 12 Jun 200214 Jun 2002


ConferenceFirst IEEE International Conference on Sensors - IEEE Sensors 2002
Country/TerritoryUnited States
CityOrlando, FL


  • Fiber optic sensors
  • Low-coherence reflectometry
  • Quasi-distributed sensors
  • Strain sensors

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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