Optical fiber coupler

U.S. Patent Number: 5329602

Abstract: An improvement is proposed for decreasing the variation in the coupling ratio of an optical fiber coupler after a heat shock test. In an optical fiber coupler which is an elongated intergral body formed by fusing a plural number of optical fibers side-by-side consisting of two straightly columnar parts and a biconical part therebetween formed by drawing and adhesively bonded to a reinforcing base with a coating layer of an adhesive therebetween, the improvement can be achieved by limiting the zone where the coating layer of an adhesive to the surface of each of the straightly columnar parts within a range from the boundary between the straightly columnar part and the biconical part to a point 8 mm apart from the boundary.

Inventors: Mori; Tsuneo (Gunma, JP), Koya; Kazuo (Gunma, JP)

Assignee: Shin-Etsu Chemical Co., Ltd. (Tokyo, JP)

Application Number: 08/069,698

Issued: 1994-07-12

Expired: 2006-07-12

Classes: 385/43 ; 385/51; 385/96

Field of search: 385/43,96,99,51

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