Optical fibre cable for distributed fibre sensing
US8634681B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 26, 2010 |
| Grant date | Jan 21, 2014 |
| Priority date | — |
| Expiry date | Jun 23, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical fiber cable for distributed fiber sensing of fluid pressure is disclosed. There are also disclosed a method and an apparatus for distributed fiber sensing of fluid pressure using the optical fiber cable. The optical fiber cable is adapted for distributed pressure sensing, and comprises: one or more optical fibers (120); and a buffer (130) surrounding the one or more optical fibers and adapted to deform asymmetrically under isotropic pressure (P) such that the fiber experiences asymmetric strain changing the birefringence of the one or more optical fibers. The optical fibers incorporated in the cable may be conventional single mode optical fibers. The optical fiber cable may be used to determine a pressure distribution along the length of the cable. The cable, apparatus or method may be used to detect pressures over long distances such as in pipes, pipelines, or wells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.