Grating-based sensor
US9574950B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2013 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Aug 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2006/2839
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical fiber-based sensor is described that is suitable for operation in a gas-rich environment. The sensor comprises a chamber into which are mounted one or more segments of optical fiber, into which are inscribed a plurality of sensor gratings. Each of the plurality of sensor gratings is configured to have the same wavelength shift over time in response to a change in gas diffusion, such that gas diffusion parameters are excluded in the determination of the respective amount of change in temperature, applied strain, and gas diffusion. Also described is a fiber, and techniques for making same, comprising of cores extend through a common cladding. The cores are doped so as to create, in conjunction with the cladding, a plurality of waveguides having the same wavelength shift over time is response to a change in gas diffusion, but different wavelength shifts in response to changes in other parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.