Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2008-01-09
2010-11-30
Doan, Jennifer (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling structure
C385S001000, C385S002000, C385S003000, C385S004000, C385S015000
Reexamination Certificate
active
07844149
ABSTRACT:
The invention relates to an electro-optic modulator structure containing an additional set of bias electrodes buried within the device for applying bias to set the operating point. Thus the RF electrodes used to modulate incoming optical signals can be operated with zero DC bias, reducing electrode corrosion by galvanic and other effects that can be present in non-hermetic packages. The bias electrodes are at least partially separated from the substrate with a buffer layer, which in one embodiment has a small amount of conductivity. This conductive buffer layer reduces optical loss from the bias electrodes and also reduces DC drift.
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Drake Glen
Kissa Karl
Minford William J.
Doan Jennifer
JDS Uniphase Corporation
Pequignot Matthew A.
Pequignot & Myers LLC
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