Brillouin spectral measuring method and Brillouin spectral measuring apparatus

摘要

The present invention relates to a Brillouin spectrum measuring method and measuring apparatus that have a structure for more accurately measuring the parameters of Brillouin spectra at predetermined sections of an optical fiber. The measuring method comprises an optical fiber section including first and second optical fibers that are serially connected via a connection portion. The first and second optical fibers have a Brillouin spectrum for which the difference between the peak frequencies in a predetermined temperature and predetermined strain-applied state for which the respective usage environments are assumed is equal to or more than a predetermined frequency difference. In the measuring method, a Brillouin spectrum which is obtained in accordance with pumping light supplied to the optical fiber section is measured, and a point of connection between the first and second optical fibers is specified on the basis of the measurement data for the measured Brillouin spectrum.