Patent ID: 6771360
Filing Date: 2004-08-03
Classification: G01M

Abstract:
A method for measuring wavelength dispersion value and/or nonlinear coefficient of optical fibers comprising:a process for emitting a pump light emitted from a first continuous wave light source and a signal light emitted from a second continuous wave light source to a test optical fiber by varying peak wavelength spacing between said pump light and said signal light, and measuring four wave mixing optical intensity generated in said test optical fiber at every peak wavelength spacing; a process for measuring optical intensity of a plurality of line spectrum constituting said pump light and a plurality of line spectrum constituting said signal light respectively; and a process for calculating so that maximum value of four wave mixing optical intensity in each line spectrum wavelength spacing calculated from said measured optical intensity of line spectrum of said pump light and said signal light coincides with measured value of optical intensity of four wave mixing in each peak wavelength spacing, and obtaining nonlinear coefficient and/or wavelength dispersion value.