Patent ID: 6909496
Filing Date: 2005-06-21
Classification: G01M

Abstract:
1. A method of measuring a nonlinear refractive index of an optical fiber, said method comprising: inputting light, an intensity of which is modulated by a modulation signal of a sine wave having a designated frequency, to one end side of an optical fiber which is a measurement object; converting the light which is incident on the one end side of the optical fiber that is the measurement object and which exits from the other end side of the optical fiber that is the measurement object into an electric signal, and finding, from the electric signal, a predetermined feature value of a signal component having a frequency equal to the frequency of the modulation signal; and obtaining a nonlinear refractive index of the optical fiber that is the measurement object from the predetermined feature value by calculation based on a nonlinear Schroedinger equation.