Measurement of temperature profile induced by the optical signal in fiber Bragg gratings using whispering-gallery modes

The temperature sensitivity of whispering-gallery mode resonances of an optical fiber is exploited to measure thermal effects induced by an optical signal of moderate power along a fiber Bragg gating (FBG). The UV inscription technique used for the fabrication of FBG introduces a permanent change in...

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Bibliographic Details
Published in:Optics letters 2014-11, Vol.39 (21), p.6277-6280
Main Authors: Delgado-Pinar, M, Villegas, I L, Díez, A, Cruz, J L, Andrés, M V
Format: Article
Language:English
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Summary:The temperature sensitivity of whispering-gallery mode resonances of an optical fiber is exploited to measure thermal effects induced by an optical signal of moderate power along a fiber Bragg gating (FBG). The UV inscription technique used for the fabrication of FBG introduces a permanent change in the absorption coefficient of the fiber; thus, thermal effects are expected. The resonance wavelength shift of whispering-gallery modes provides information about the temperature change in the fiber, point to point. We present the experimental characterization of the thermal effects in FBG as a function of the wavelength and the power of the launched optical signal through the grating.
ISSN:0146-9592
1539-4794
DOI:10.1364/ol.39.006277