Optical waveguides – Planar optical waveguide – Thin film optical waveguide
Reexamination Certificate
2006-02-28
2006-02-28
Williams, Joseph (Department: 2879)
Optical waveguides
Planar optical waveguide
Thin film optical waveguide
Reexamination Certificate
active
07006746
ABSTRACT:
A waveguide and resonator are formed on a lower cladding of a thermo optic device, each having a formation height that is substantially equal. Thereafter, the formation height of the waveguide is attenuated. In this manner, the aspect ratio as between the waveguide and resonator in an area where the waveguide and resonator front or face one another decreases (in comparison to the prior art) thereby restoring the synchronicity between the waveguide and the grating and allowing higher bandwidth configurations to be used. The waveguide attenuation is achieved by photomasking and etching the waveguide after the resonator and waveguide are formed. In one embodiment the photomasking and etching is performed after deposition of the upper cladding. In another, it is performed before the deposition. Thermo optic devices, thermo optic packages and fiber optic systems having these waveguides are also taught.
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Agarwal Vishnu K.
Blalock Guy T.
Foresi James S.
Fried Dale G.
Rhodes Howard E.
Macchiarolo Peter
Micro)n Technology, Inc.
Schwegman Lundberg Woessner & Kluth P.A.
Williams Joseph
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