Silicon-waveguide-based broadband polarization beam rotator
US9864141B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2016 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Dec 9, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12152
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact polarization beam rotator includes a converter waveguide comprising a first segment and a second segment both in corresponding taper rib shapes sharing a first middle plane and configured to receive an input optical signal with TM polarization mode from an input plane and convert the TM polarization mode to TE1 polarization mode comprising a first arm mode and a second arm mode at a second middle plane. The polarization beam rotator additionally includes a splitter waveguide coupled to the second middle plane for separating the first arm mode and the second arm mode at a third plane respectively coupled to a first branch waveguide to deliver the first arm mode in phase and a second branch waveguide to reverse the second arm mode phase by 180°, and a 2×1 MMI coupler waveguide to combine both arm modes in phase to an output optical signal with TE polarization mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.