Mitsubishi Gas Chemical Company, Inc.

Tomoko Kondoh

Norio Takeda

Mitsuzo Arii

Kuniaki Jinnai

Hisashi Ohwada

Osamu Kondoh

Shigeo Kataoka

An optical divider for multimode optical fibers of graded-index (GI) type composed of an optical input section for securing input optical fiber, a branching section including an optical waveguide having rectangular sectional shapes irrespective of a kind of material or a method of fabricating the same and consists of a main optical waveguide and branch waveguide, and an optical output section for securing an array of output optical fibers, wherein the main optical waveguide having a width D and a length M is divided contiguously into N branch optical waveguides, preferably three or more having uniform width W, the optical waveguide having substantially uniform core thickness T is specifically related with the core diameter K of the otpical fiber to fufull the following relational formulas:

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Tokyo, Japan

Tomoko Kondoh