Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-12-06
2005-12-06
Connelly-Cushwa, Michelle R. (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S043000, C385S045000
Reexamination Certificate
active
06973236
ABSTRACT:
A tapered waveguide improves insertion loss occurring at the slab/waveguide interface of an optical array waveguide grating (AWG). The tapered waveguide has two segments. The first segment decreases from a first thickness, nearest the slab of the AWG to a second thickness moving away from the slab. The second segment has a substantially constant or uniform thickness equal to the second thickness of the first segment. The second segment may also have a swallowtail shape comprising a forked end having two sidewalls tapered back towards the first segment. Light that would otherwise be lost at the slab/waveguide interface is instead captured by the tapered waveguide which laterally channels the light back into the waveguides thus mitigating insertion loss.
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So Daniel W.
Yoo Chan H.
Connelly-Cushwa Michelle R.
Reif Kevin A.
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