Optical waveguides – With optical coupler – Particular coupling function
Reexamination Certificate
2009-05-27
2011-10-04
Sanghavi, Hemang (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling function
C385S043000
Reexamination Certificate
active
08031991
ABSTRACT:
An optical coupler is formed of a low index material and exhibits a mode field diameter suitable to provide efficient coupling between a free space optical signal (of large mode field diameter) and a single mode high index waveguide formed on an optical substrate. One embodiment comprises an antiresonant reflecting optical waveguide (ARROW) structure in conjunction with an embedded (high index) nanotaper coupling waveguide. Another embodiment utilizes a low index waveguide structure disposed in an overlapped arrangement with a high index nanotaper coupling waveguide. The low index waveguide itself includes a tapered region that overlies the nanotaper coupling waveguide to facilitate the transfer of the optical energy from the low index waveguide into an associated single mode high index waveguide. Methods of forming these devices using CMOS processes are also disclosed.
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Patel Vipulkumar
Webster Mark
Koba Wendy W.
Lightwire Inc.
Sanghavi Hemang
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