Abstract
The temperature dependences of spontaneous Brillouin and Rayleigh scattering intensities in a dispersion-shifted fiber have been measured over a wide temperature range by optical-time-domain reflectometry. It was found that spontaneous Brillouin and Rayleigh intensities normalized by room-temperature values have linear dependences on temperature, with coefficients (0.26 ± 0.02)%/°C and (0.015 ± 0.002)%/°C in temperature ranges -27–819 and 29–827 °C, respectively. Experimental results have demonstrated that both kinds of scattering can be used for distributed high-temperature measurement.
© 2003 Optical Society of America
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