Sensor with high-sensitivity optical fiber having a holographic detector comprising a liquid crystal light valve
US9791302B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 14, 2014 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Dec 28, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01H9/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical fiber sensor for locating an excitation in proximity to an optical fiber assembly comprises: a laser assembly configured to emit N laser beams indexed i with N>1, of respective emission wavelength λi, an optical fiber assembly comprising N successive sections indexed i, an optical system configured to: inject the laser beams, receive N signal beams indexed i respectively of wavelengths λi, generate N reference beams indexed i respectively of wavelengths λi, produce N interference areas indexed i, a holographic detector comprising: a liquid crystal light valve that at least partially covers the interference areas, and is configured to produce N holograms indexed i from, respectively, N interference areas, at least one optical detector configured to detect N output optical signals indexed I, a processing unit adapted to identify the section of the fiber assembly situated in proximity to the excitation to be located.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.