Optical measurement of electrical quantities using inverse piezoelectric effect with dual double-mode fiber
US5343036A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1993 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Apr 9, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a fiber-optic sensor for measuring electric fields and voltages, in place of a double-mode fiber extending between sensor head (15) and evaluating unit (14) two separate, similar double-mode fibers (5a, 5b) are connected in series in the manner of a tandem interferometer. The first double-mode fiber (5a), serving as sensor fiber, is operated in reflection geometry. Together with the sensor element (6), it is disposed in the sensor head (15). The second double-mode fiber (5b), serving as reference fiber, is situated within the separate evaluating unit (14). Within the latter there is also provided at least one fiber coupler or beam splitter, which is required on account of the operation of the sensor fiber in reflection geometry. Sensor head (15) and evaluating unit (14) are connected by a single insensitive monomode fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.