Miniature fiber-optic high temperature sensor based on a hybrid structured Fabry-Perot interferometer

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....

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Bibliographic Details
Published inOptics letters Vol. 33; no. 21; p. 2455
Main Authors Choi, Hae Young, Park, Kwan Seob, Park, Seong Jun, Paek, Un-Chul, Lee, Byeong Ha, Choi, Eun Seo
Format Journal Article
LanguageEnglish
Published United States 01.11.2008
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Summary: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.
ISSN:0146-9592
DOI:10.1364/ol.33.002455