Remote interrogation of WDM fiber-optic intensity sensors deploying delay lines in the virtual domain Articles uri icon

publication date

  • May 2013

start page

  • 5870

end page

  • 5880


  • 5


  • 13

International Standard Serial Number (ISSN)

  • 1424-3210

Electronic International Standard Serial Number (EISSN)

  • 1424-8220


  • In this work a radio-frequency self-referencing WDM intensity-based fiber-optic sensor operating in reflective configuration and using virtual instrumentation is presented. The use of virtual delay lines at the reception stage, along with novel flexible self-referencing techniques, and using a single frequency, avoids all-optical or electrical-based delay lines approaches. This solution preserves the self-referencing and performance characteristics of the proposed WDM-based optical sensing topology, and leads to a more compact solution with higher flexibility for the multiple interrogation of remote sensing points in a sensor network. Results are presented for a displacement sensor demonstrating the concept feasibility.


  • Electronics
  • Industrial Engineering


  • optical sensing; passive remote sensing; self-referencing; virtual delay line