Optical tap

Details Optical tap Optical tap

2005-01-18

2005-01-18

Font, Frank G. (Department: 2877)

Optical waveguides

With optical coupler

Particular coupling structure

C385S045000

Reexamination Certificate

active

06845197

ABSTRACT:
The present invention relates to a semiconductor optical tap comprising: a multimode interferometer (MMI) (6); an input waveguide (1) coupled to the MMI; a first output waveguide (2) coupled to the MMI; and a second output waveguide (3) coupled to the MMI. The first and second output waveguides (2,3) overlap (d) such that unequal portions of light are coupled from the MMI into the first and second output waveguides (2,3). The input waveguide (1) and the first and second output waveguides (2,3) may have a rib structure. They may also be adiabatically tapered waveguides. The first and second output waveguides (2,3) may have different starting widths.

REFERENCES:
patent: 5289551 (1994-02-01), Nakama et al.
patent: 6047096 (2000-04-01), Augustsson
patent: 0 484 878 (1992-05-01), None
Search Report under Section 17(5); Application No. GB 0201787.9; Date of Search Jun. 6, 2002.

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