Electro-optic device
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United States of America Patent
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Jun 1, 1999
Issued Date -
N/A
app pub date -
May 22, 1998
filing date -
Sep 21, 1993
priority date (Note) -
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Abstract
The device comprises a layer of silicon separated from a substrate by a layer of insulating material. A rib having an upper surface and two side surfaces is formed in the layer of silicon to provide a waveguide for the transmission of optical signals. A lateral doped junction is formed between the side surfaces of the rib such that an electrical signal can be applied across the junction to control the density of charge carriers across a substantial part of the cross-sectional area of the rib thereby actively altering the effective refractive index of the waveguide.
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