METHOD AND DEVICE FOR MANUFACTURING FIBER GRATING

• Main Authors: UEMURA YASUO, ISHII YOHEI, SAITO KEIICHIRO, SHIGEMATSU TAKASHI
• Format: Patent
• Language: English
• Published: 05.02.2004
• Edition: 7
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To apodize even laser light having a uniform beam profile so that a profile of a reflected wave may have a desired shape and to improve S/N by suppressing or excluding occurrence of sidelobes of the reflected wave. SOLUTION: In a fiber grating manufacturing method for forming a diffraction grating having a refractive index periodically changed, in a core of an optical fiber, laser light 2 having a uniform beam profile has the irradiation quantity controlled while being radiated to the optical fiber, so that the integral value of the irradiation intensity of radiation of laser light in the lengthwise direction of the optical fiber 1 is changed like a bell shape. COPYRIGHT: (C)2004,JPO