Solid-state interferometric interrogator and multiplexer for high-speed dynamic and absolute FBG wavelength measurement

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Abstract

We present a solid-state FBG array interrogator and multiplexer capable of determining absolute FBG wavelengths and of providing high-speed, high-resolution static and dynamic measurements. Using a described procedure, deployable on multiplexing passive-interferometric schemes, the system is able to determine initial sensor wavelengths and thereafter track wavelength changes with interferometric resolution. The scheme allows high-resolution interrogation of FBG sensor arrays to be applied to many industrial applications, where previously the lack of combined absolute and quasi-static wavelength measurement precluded the use of interferometric techniques. Using a preliminary laboratory embodiment, we demonstrate a wavelength determination accuracy of <0.3 nm and a measurement resolution of 10 fm/√Hz, and propose pathways to improved performance and miniaturisation.
Original languageEnglish
Title of host publicationProceedings of SPIE Volume 8794
Subtitle of host publicationFifth European Workshop on Optical Fibre Sensors
EditorsLeszek R. Jaroszewicz
Number of pages6
DOIs
Publication statusPublished - 6 May 2013
Event5th European Workshop on Optical Fiber Sensors - Krakow, Poland
Duration: 19 May 201322 May 2013

Conference

Conference5th European Workshop on Optical Fiber Sensors
CountryPoland
CityKrakow
Period19/05/1322/05/13

Keywords

  • interferometric interrogator
  • multiplexer
  • FBG wavelength measurement

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  • Cite this

    Orr, P., Perry, M., Fusiek, G., & Niewczas, P. (2013). Solid-state interferometric interrogator and multiplexer for high-speed dynamic and absolute FBG wavelength measurement. In L. R. Jaroszewicz (Ed.), Proceedings of SPIE Volume 8794: Fifth European Workshop on Optical Fibre Sensors https://doi.org/10.1117/12.2026772