Patent ID: 7298944
Filing Date: 2007-11-20
Classification: G02B

Abstract:
1. A method of manufacturing an optical fiber grating having a plurality of grating sections arranged intermittently at a predetermined period along a longitudinal direction, by irradiating, onto the side of an optical fiber having locations made of a material wherein the refractive index rises when irradiated by light of a specific wavelength, light of said specific wavelength along a length direction of the optical fiber at a predetermined period, causing the refractive index of the irradiated sections to rise, wherein in the formation of a plurality of high refractive index sections, light is irradiated by varying sequentially the light irradiation position along the longitudinal direction of the optical fiber, so that the irradiation amount of the light becomes equal around the circumferential direction of the optical fiber as a result of integrating thr light irradiation amount along the length direction of the optical fiber over all of said grating section.