Optical waveguide circuit, optical branched waveguide circuit, a

Details Optical waveguide circuit, optical branched waveguide circuit, a Optical waveguide circuit, optical branched waveguide circuit, a

1998-04-30

2000-05-09

Ullah, Akm E.

Optical waveguides

With optical coupler

Particular coupling structure

359618, G02B 626

Patent

active

060614870

ABSTRACT:
An optical branched waveguide and an optical waveguide circuit which are easily fabricated, have a small size, and are low in cost. A linear first optical waveguide and second optical waveguide are crossed at a predetermined angle with respect to the substrate, a groove forming a predetermined angle relative to the optical waveguides and having a depth set to not less than the depth of the first and second optical waveguides is formed so as to include the intersecting region of the first optical waveguide and the second optical waveguide, and an optical element having a partial reflection and partial transmission function passing part of an incident light guided through the first optical waveguide therethrough and guiding this to the first optical waveguide and, at the same time, reflecting part of the incident light and guiding the same to the second optical waveguide is inserted into the groove so as to include the intersecting region of the first optical waveguide and the second optical waveguide.

REFERENCES:
patent: 4767171 (1988-08-01), Rudolf et al.
patent: 4824200 (1989-04-01), Hideki et al.
patent: 5214725 (1993-05-01), Hisaharu et al.
patent: 5239600 (1993-08-01), Yuichi et al.
patent: 5764825 (1998-06-01), Akira et al.
patent: 5771322 (1998-06-01), Kiyoto et al.

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