Being the wavelength dispersion measuring method which does the wavelength dispersion

摘要

PROBLEM TO BE SOLVED: To provide a chromatic dispersion measuring method and a device of an optical fiber for observing Rayleigh back-scattering light and determining nondestructively chromatic dispersion of the optical fiber as a function of the distance, dispensing with a high-output light source, and having excellent cost effectiveness.;SOLUTION: This chromatic dispersion measuring method for measuring a distribution in the length direction of the chromatic dispersion of the optical fiber is characterized as follows: an optical pulse is allowed to enter from one end of the optical fiber, and the Rayleigh back-scattering light intensity is observed as a function of the distance from an input end; the statistical average and dispersion at each distance of the observed Rayleigh back-scattering light intensity are calculated; and the chromatic dispersion at each distance of the optical fiber is calculated from the statistical average and dispersion at each distance of the calculated Rayleigh back-scattering light intensity.;COPYRIGHT: (C)2007,JPO&INPIT