Fast brillouin optical time domain analysis for dynamic sensing
US8982340B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2013 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Jul 22, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/39
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for conducting fast Brillouin optical time domain analysis for dynamic sensing of optical fibers is provided herein. The method includes the following stages: injecting a pump pulse signal into a first end of an optical fiber and a probe signal into a second end of the optical fiber, wherein the probe and the pump pulse signals exhibit a frequency difference between them that is appropriate for an occurrence of a Brillouin effect; alternating the frequency of either the probe or the pulse signals, so as the alternated signal exhibits a series of signal sections, each signal section having a predefined common duration and a different frequency; measuring the Brillouin probe gain for each one of the alternating frequencies; and extracting physical properties of the optical fiber throughout its length at sample points associated with the sampled time and the frequencies, based on the measured Brillouin probe gain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.