Multiple polarization fiber optic telemetry
US10218435B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2015 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Dec 9, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/074
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A downhole tool apparatus is disclosed that includes an input fiber optic cable coupled to an electro-optic modulator. The input fiber optic cable propagates first and second actively orthogonally polarized light beams. The electro-optic modulator modulates the first and second actively orthogonally polarized light beams in response to a measurement data stream (e.g., telemetry data). A single light beam comprising the modulated first and second actively orthogonally polarized light beams is propagated over an output fiber optic cable so that the modulated first and the second actively orthogonally polarized light beams propagate the same data through the output fiber optic cable. Recovery circuitry coupled to the single light beam is then used to detect, demodulate, and decode the original measurement data stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.