METHOD AND DEVICE FOR MANUFACTURING FIBER GRATING

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...

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Bibliographic Details
Main Authors UEMURA YASUO, ISHII YOHEI, SAITO KEIICHIRO, SHIGEMATSU TAKASHI
Format Patent
LanguageEnglish
Published 05.02.2004
Edition7
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
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Summary: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
Bibliography:Application Number: JP20020197586