To provide a method with which a Gaussian type distribution apodization is surely given with high accuracy by a two-luminous flux interferometric method for manufacturing the optical waveguide Bragg grating and to provide an apparatus of manufacturing an optical waveguide Bragg grating. 光導波路ブラッググレーティングを作製する2光束干渉法で、ガウシアン分布のアポダイゼーションを高精度で確実に付与する方法と、光導波路ブラッググレーティング製造装置を提供 - 特許庁