Distributed optical fiber sensor based on Raman and Brillouin scattering
US8785859B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2010 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Oct 25, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/247
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distributed optical fiber sensor based on Raman and Brillouin scattering is provided. The distributed optical fiber sensor includes a semiconductor FP cavity pulsed wideband optical fiber laser (11), a semiconductor external-cavity continuous narrowband optical fiber laser (12), a wave separator (13), an electro-optic modulator (14), an isolator (15), an Er-doped optical fiber amplifier (16), a bidirectional coupler (17), an integrated wavelength division multiplexer (19), a first photoelectric receiving and amplifying module (20), a second photoelectric receiving and amplifying module (21), a direct detection system (22), a narrowband optical fiber transmission grating (23), a circulator (24) and a coherence detection module (25). The temperature and the strain can be measured simultaneously, and the signal-to-noise ratio of the system is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.