Patent ID: 6441893
Filing Date: 2002-08-27
Classification: G01M

Abstract:
A measurement method of resonant nonlinearity in a nonlinear optical fiber using a long period fiber grating pair characterized by:connecting a nonlinear optical fiber between a first long period fiber grating and a second long period fiber grating; injecting light from a pump light source for causing resonant nonlinearity, and at the same time, injecting light from a light source of which the nonlinearity is to be measured through first long period fiber grating or said second long period fiber grating at one side; transmitting said light from said two light sources through said nonlinear optical fiber and said second long period fiber grating or said first long period fiber grating at the other side; and measuring said light from said light source of which the nonlinearity is to be measured by a spectrum analyzer using the change of interference pattern formed by said long period fiber grating pair.