PROBLEM TO BE SOLVED: To provide a method of manufacturing an optical interface module, which uses a method of easily and reliably connecting a light-emitting element and a light-receiving element to an optical waveguide.;SOLUTION: The method of manufacturing an optical interface module includes: forming a lower clad layer on a first surface of a substrate having a first and a second surface; forming a core layer on the lower clad layer and forming two grooves in part of the core layer to form a first core part between the two grooves having one end and another end; forming an upper clad layer on the core layer and in the grooves; mounting a light-emitting element on the first surface of the substrate; mounting a light-receiving element on the first surface of the substrate; forming a second core part optically coupled to the light-emitting element and one end of the first core part, by installing two grooves by laser machining in the upper clad layer and the core layer between the light-emitting element and one end of the first core part; and forming a third core part optically coupled to the light-receiving element and the other end of the first core part, by installing two grooves by laser machining in the upper clad layer and the core layer between the light-receiving element and the other end of the first core part.;COPYRIGHT: (C)2010,JPO&INPIT
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