METHOD FOR MANUFACTURING OPTICAL FIBER GRATING

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical fiber grating, with which the optical fiber grating with desired transmission and reflection characteristics is manufactured at a low cost and especially the optical fiber grating with low polarization dependence is manufactured. SOLUTION: The optical fiber grating is manufactured with a first step to form a continuous refractive index gradient by making light 2 with a specified wavelength irradiate an optical fiber 3 as an irradiation quantity which is uniform in a circumferential direction and further continuously varies in a longitudinal direction and a second step to form a grating part by making light 2 as an irradiation quantity which varies with a periodical interval irradiate the optical fiber 3. COPYRIGHT: (C)2005,JPO&NCIPI