High temperature sensor based on an in-fibre Fabry-Perot cavity

Oliver Schneller, Jinesh Mathew, William N. Macpherson, Robert R J Maier

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


We present the fabrication, characterization and encapsulation of a fibre optic temperature sensor based upon a micro Fabry-Perot (F-P) cavity. The F-P cavity is formed between a reflective in-fibre metallic splice and the air-fibre boundary at the end of the sensor. A change in temperature modifies the optical cavity length and this is observed as a shift in the reflected interference spectrum. The temperature resolution of the sensor is <10 °C. The sensor can reliably operate for high temperature measurement up to 1000 °C. Furthermore a sealed off capillary is used to avoid strain transfer to the sensor in embedded applications.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
ISBN (Print)9781628411751
Publication statusPublished - 2014
Event23rd International Conference on Optical Fibre Sensors - Santander, United Kingdom
Duration: 2 Jun 20146 Jun 2014


Conference23rd International Conference on Optical Fibre Sensors
Country/TerritoryUnited Kingdom


  • Fabry-Perot
  • Fibre optic sensor
  • Temperature
  • Thin-film coating


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