Journal
OPTICS LETTERS
Volume 33, Issue 21, Pages 2455-2457Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.33.002455
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Funding
- Gwangju Institute of Science and Technology (GIST) [BK21]
- Korea Science and Engineering Foundation (KOSEF)
- Korean Ministry of Science and Technology (MOST) [R01-2007-000-20821-0]
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A miniature Fabry-Perot (FP) interferometric fiber-optic sensor suitable for high-temperature sensing is proposed and demonstrated. The sensor head consists of two FP cavities formed by fusion splicing a short hollow-core fiber and a piece of single-mode fiber at a photonic crystal fiber in series. The reflection spectra of an implemented sensor are measured at several temperatures and analyzed in the spatial frequency domain. The experiment shows that the thermal-optic effect of the cavity material is much more appreciable than its thermal expansion. The temperature measurements up to 1000 degrees C with a step of 50 degrees C confirm that it could be applicable as a high-temperature sensor. (C) 2008 Optical Society of America
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