Constant optical power sensor using a light source current servo combined with digital demodulation intensity suppression for radiation and vibration insensitivity in a fiber optic gyroscope
US8213018B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2010 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Dec 30, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/721
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Systems and methods for fiber-optic gyroscopes are provided. In one embodiment, a fiber-optic gyroscope comprises: a light source current servo coupled to a light source that transmits light through an optic path, wherein the light source current servo controls intensity of light through the optic path via a light source current drive that supplies current to power the light source; and an intensity control signal processor coupled to the optic path via a photo detector, wherein the intensity control signal processor outputs an intensity control signal to the light source current servo, wherein the intensity control signal is a function of intensity of light as received at the photo detector; wherein the light source current servo compares the intensity control signal against a stable analog voltage reference to adjust the light source current drive and drive optical power at the photo detector towards a constant level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.