Patent ID: 6781678
Filing Date: 2004-08-24
Classification: G01M

Abstract:
A wavelength dispersion distribution measuring method comprising:combining two input light signals with different wavelengths into a light pulse signal, inputting the light pulse signal into an optical fiber, detecting a wavelength component of one of four-wave mixed light generated by interaction of two wavelengths launched among total back-scattered light from the optical fiber by an optical time domain reflectometer, measuring wavelength dispersion distribution characteristics of the optical fiber, wherein the measuring includes: emitting the light pulse signal from a first end of the optical fiber and measuring a first wavelength dispersion distribution characteristic of the optical fiber, emitting the light pulse signal from a second end of the optical fiber and measuring a second wavelength dispersion distribution characteristic of the optical fiber, and performing superimposition processing of measured results of the first and second wavelength dispersion distribution characteristics.