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High density optical waveguide using hybrid spiral pattern

United States Patent

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10,663,662
May 26, 2020
View the Complete Patent at the US Patent & Trademark Office
A hybrid spiral waveguide geometry is proposed that exhibits essentially zero curvature (i.e., infinite bend radius) at the center of the spiral (similar to a Fermat spiral), with the curvature then increasing in value as the spiral moves outward. Advantageously, as the spiral moves away from the center, the spacing between adjacent waveguides quickly approaches a constant value (similar to an Archimedean spiral). This hybrid spiral structure has been found to allow for a high density waveguide to be created with lower loss and requiring a smaller size than many conventional spiral configurations and finds use in optical delay lines, amplifiers and arrayed waveguide gratings.
16/397,624
April 29, 2019
1/1;
G02B 6/125 (20060101); G02F 1/01 (20060101); G02B 6/12 (20060101);
STATEMENT OF GOVERNMENT SUPPORT This invention was made with Government support under Contract DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The U.S. Government has certain rights in the invention.