Buried taper with reflecting surface
US12422618B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2022 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Dec 9, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/136
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical device has a semiconductor chip with a photonic circuit. The photonic circuit includes a waveguide with a first portion and a second portion. A cross sectional area of the second portion of the waveguide is larger than a cross sectional area of the first portion of the waveguide. The first portion of the waveguide is positioned over a device platform. The waveguide includes a taper that provides a transition between the first portion of the waveguide and the second portion of the waveguide. The taper is an inverted taper that extends below the first portion of the waveguide into the device platform. The second portion of the waveguide terminates at a facet. A recess extends into the chip. The recess has lateral sides. A first one of the lateral sides serving as the facet. A second one of the lateral sides is positioned such that light signals that exit the waveguide through the facet travel across the recess to be received at the second lateral side. The second lateral side is configured to reflect the light signals such that after reflection by the second lateral side the light signals travel away from the second lateral side and toward a location that is above the chip…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.