High density optical waveguide using hybrid spiral pattern
US10663662B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2019 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Apr 29, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12142
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.