Ring waveguide based integrated photonics optical gyroscope with balanced detection scheme
US12422258B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2023 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | May 6, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/12142
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present disclosure relates to integrated photonics-based optical gyroscopes with silicon nitride (SiN) waveguide-based microresonators. SiN microresonators are fabricated either on a fused silica platform or on a silicon substrate with oxide cladding. A narrow linewidth high-Q laser is hybridly integrated on a silicon photonics platform. The laser is tuned with a first SiN microresonator, and the rotational sensing component of the gyroscope comprises another SiN microresonator. The silicon photonics front-end chip has components for a balanced detection scheme to cancel noise in the optical signal coming back from the rotational sensing component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.