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.
Original language | English |
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Pages (from-to) | 2419-2425 |
Number of pages | 7 |
Journal | Journal of Lightwave Technology |
Volume | 33 |
Issue number | 12 |
Early online date | 9 Feb 2015 |
DOIs | |
Publication status | Published - 2015 |
Keywords
- Fabry–Perot cavity
- metal thin-film
- optical fiber devices
- optical fiber sensors
- strain isolation
- temperature sensors