In-Fiber Fabry–Perot Cavity Sensor for High-Temperature Applications

Author

Mathew, Jinesh ; Schneller, Oliver ; Polyzos, Dimitrios ; Havermann, Dirk ; Carter, Richard M. ; MacPherson, William N. ; Hand, Duncan P. ; Maier, Robert R. J.

Author_Institution

Inst. of Photonics & Quantum Sci., Heriot-Watt Univ., Edinburgh, UK

Volume

33

Issue

12

fYear

2015

fDate

June15, 15 2015

Firstpage

2419

Lastpage

2425

Abstract

The fabrication, characterization and encapsulation of a fiber optic temperature sensor based upon a micro Fabry-Perot (F-P) cavity is presented. The F-P cavity is formed between a reflective in-fiber metallic splice and the air-fiber boundary at the end of the sensor. A change in temperature modifies the optical cavity length, and this is observed as a change in the reflected interference spectrum. The sensor has been demonstrated for high-temperature measurement up to 1100 °C. The stability of the sensor system is ~10 °C over a period exceeding 300 h at 1100 °C. Furthermore, a sealed capillary is used as a protective enclosure.

Keywords

encapsulation; fibre optic sensors; optical fibre fabrication; optical fibre testing; splicing; temperature measurement; temperature sensors; air-fiber boundary; fiber optic temperature sensor characterization; fiber optic temperature sensor encapsulation; fiber optic temperature sensor fabrication; high-temperature measurement; in-fiber Fabry-Perot cavity sensor; microFabry-Perot cavity; optical cavity length; protective enclosure; reflected interference spectrum; reflective in-fiber metallic splice; sealed capillary; sensor system stability; temperature 10 degC; temperature 1100 degC; time 300 h; Cavity resonators; Optical fiber sensors; Optical fibers; Temperature measurement; Temperature sensors; Thermal stability; Fabry-Perot cavity; Fabry???Perot cavity; metal thin-film; optical fiber devices; optical fiber sensors; strain isolation; temperature sensors;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2015.2397936

Filename

7036038