Optical waveguides – With optical coupler – Particular coupling function
Reexamination Certificate
2006-07-25
2006-07-25
Glick, Edward J. (Department: 2882)
Optical waveguides
With optical coupler
Particular coupling function
C385S014000, C385S050000
Reexamination Certificate
active
07082235
ABSTRACT:
A strip loaded waveguide comprises a slab and a strip, wherein the strip is separated from the slab. Nevertheless, a guiding region is provided for propagating an optical mode and this guiding region extends both within the strip and the slab. A layer of material having an index of refraction lower than that of the strip and the slab may be disposed between and separate the strip and the slab. In one embodiment, the slab comprises a crystalline silicon, the strip comprises polysilicon or crystalline silicon, and the layer of material therebetween comprises silicon dioxide. Such waveguides may be formed on the same substrate with transistors. These waveguides may also be electrically biased to alter the index of refraction and/or absorption of the waveguide.
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Artman Thomas R.
California Institute of Technology
Glick Edward J.
Knobbe Martens Olson & Bear LLP
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