Optical waveguides – With optical coupler – Switch
Reexamination Certificate
2005-08-30
2005-08-30
Ullah, Akm Enayet (Department: 2874)
Optical waveguides
With optical coupler
Switch
C385S040000, C385S125000, C385S129000, C385S130000, C359S320000, C359S322000
Reexamination Certificate
active
06937781
ABSTRACT:
The present invention provides an optical switch having a photonic crystal structure.An optical switch of the invention has a slab optical waveguide structure whose core (35) has a two-dimensional photonic crystal structure where two or more media (33, 34) with different refractive indices are alternately and regularly arranged in a two-dimensional manner. The photonic crystal structure comprises: a line-defect waveguide; and means for altering the refractive index of the line-defect waveguide.
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Shirane Masayuki
Tokushima Masatoshi
NEC Corporation
Petkovsek Daniel
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