Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2006-08-08
2006-08-08
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Particular coupling structure
C385S027000, C385S031000, C385S039000, C385S045000, C385S050000
Reexamination Certificate
active
07088889
ABSTRACT:
An optical splitter includes a main waveguide, a tapered waveguide, and a split waveguide group having first and second split waveguides. The side portions of the tapered waveguide taper and expand from a first end portion toward second end portions. The widths of the split waveguides differ from each other. The whole width of the split waveguide group at connecting portions between the tapered waveguide and the split waveguides is smaller than the width of the tapered waveguide at the second end portions. Step portions are formed between the split waveguide group and the side portions.
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Narita Takeshi
Takahashi Fumio
Font Frank G.
Lepisto Ryan
NHK Spring Co., LTD
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