Determination of Brillouin Backscattering Strain and Temperature Coefficients in Telecommunication Optical Fibers
Abstract
In this paper, the Brillouin spectra of silica-based optical fibers were investigated, and their temperature and strain dependence were determined. The values of the thermal coefficients are more diverse than those of the strain, based on the twelve commercially available optical fibers. The values ranging from 1.1 to 1.4 MHz/°C and from 0.043 to 0.053 MHz/µε for the thermal and strain coefficients, respectively. Furthermore, the long-term measurements of the ambient temperature were carried out using bare optical fiber, determining the absolute error at the level up to 7°C.
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