Ring waveguide based integrated photonics optical gyroscope with gain tuning for enhanced performance
US11060869B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 2020 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Nov 24, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12138
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An integrated photonics optical gyroscope fabricated on a silicon nitride (SiN) waveguide platform comprises a first straight waveguide to receive incoming light and to output outgoing light to be coupled to a photodetector to provide an optical signal for rotational sensing. The gyroscope comprises a first microresonator ring proximate to the first straight waveguide. Light evanescently couples from the first straight waveguide to the first microresonator ring and experiences propagation loss while circulating as a guided beam within the first microresonator ring. The guided beam evanescently couples back from the first microresonator ring to the first straight waveguide to provide the optical signal for rotational sensing after optical gain is imparted to guided beam to counter the propagation loss. In a coupled-ring configurations, the first microresonator ring acts as a loss ring, and optical gain is imparted to a second microresonator ring which acts as a gain ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.