Method and device for measuring nonlinear refractive index of optical fiber

摘要

A transmitting section (22) makes light, intensity-modulated by a modulating signal of a sine wave having a designated frequency, be incident on one end side of an optical fiber (1) which is a measurement object. A feature value determining section (32) converts the light, which exits from another end side of the optical fiber, into an electric signal, and finds, from the electric signal, a predetermined feature value of a signal component having a frequency equal to the frequency of the modulating signal. A computing section (33) obtains a nonlinear refractive index of the optical fiber (1) to be measured from the predetermined feature value by calculation corresponding to the predetermined feature value based on a nonlinear Schroedinger (Schr¦dinger) equation. IMAGE