Low loss lateral optical waveguide intersections

Details Low loss lateral optical waveguide intersections Low loss lateral optical waveguide intersections

2011-03-01

2011-03-01

Doan, Jennifer (Department: 2874)

Optical waveguides

Integrated optical circuit

C385S123000, C385S125000, C385S129000

Reexamination Certificate

active

07899280

ABSTRACT:
A geometrically shaped optical waveguide crossing with minimal transmission loss is described. A symmetrically tapered waveguide intersection is used to minimize loss in the intersecting region where at least two optical waveguides cross one another. The present invention embodies a waveguide crossing that includes tapering the width of the waveguides as they approach the intersecting region, forcing the field of light to contract, reducing asymmetric field distortions, and thus reducing transmission loss and effectively minimizing crosstalk. This is accomplished by focusing light through a perpendicular or near perpendicular intersection by simple linear tapering rather than by the use of a lens or other previously used devices.

REFERENCES:
patent: 7577320 (2009-08-01), Little

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