Whispering gallery mode inertial sensor and method
US11719717B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2018 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Aug 31, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A whispering gallery mode inertial sensor includes a whispering gallery mode resonator; an evanescent coupler configured to couple with an evanescent field of the resonator so that light is transmitted to and received from the resonator by the coupler; a displacement sensor configured to determine a displacement of the resonator according to the light received from the resonator by the coupler; a controller configured to determine an acceleration and/or rate of rotations experienced by the resonator based on the displacement of the resonator, the controller being further configured to apply a restoring force to the resonator in a closed feedback loop based on the displacement of the resonator in order to maintain a predetermined mechanical state of the resonator; and a timing sensor configured to determine a timing signal based on an optical frequency comb produced by the resonator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.