Apparatus for interferometric sensing
US7920270B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2006 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Nov 28, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2290/45
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for interferometric sensing, comprising a plurality of single-longitudinal mode laser sources to each provide radiation at a corresponding plurality of selected wavelengths, and at least one modulator to frequency or phase modulate the radiation from each laser; a plurality of Fabry-Perot interferometers formed by Bragg Gratings written into optical fibre, each interferometer being responsive to one of the said plurality of wavelengths to each produce a reflected or transmitted optical output signal dependent on the corresponding interferometer path length; and one or more demodulators to demodulate the optical output signals and produce a corresponding plurality of measurement signals indicative of optical path lengths of the respective interferometers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.