Optical coupler

Details Optical coupler Optical coupler

2006-03-28

2006-03-28

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

Reexamination Certificate

active

07020367

ABSTRACT:
An optical coupler comprises a tapered waveguide formed so that a waveguide width may be narrower as going from a predetermined starting position toward an emission end of a light signal. A difference between a first coupling factor and a second coupling factor is set within a predetermined range. The first coupling factor is the coupling factor to a waveguide having the same width as that in a first position in an inherent mode in the case where the tapered waveguide is cut in the first position. A second coupling factor is the coupling factor to a waveguide having the same width as that in a second position where is separated at a predetermined distance from the first position along a direction toward the emission end in an inherent mode in the case where the tapered waveguide is cut in the second position.

REFERENCES:
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patent: 3944950 (1976-03-01), Jacobs et al.
patent: 5127081 (1992-06-01), Koren et al.
patent: 5546483 (1996-08-01), Inoue et al.
patent: H09-15435 (1997-01-01), None
patent: 2850996 (1998-11-01), None
patent: 2850996 (1998-11-01), None
patent: 2929481 (1999-05-01), None

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