Temperature-compensated fiber optic current sensor
US6734657B2 · kind B2 · utility
7Cited by
8References
11Claims
0Family size
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Key dates
| Filing date | Jan 5, 2001 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jan 5, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a fiber optic current sensor having a coiled sensor fiber (1) which encloses a current conductor (S), and at least one phase delay element (4, 5) adjoining the sensor fiber (1), the at least one phase delay element (4, 5) has a phase delay with a temperature dependence such that it at least approximately compensates for a temperature dependence of a Verdet's constant (V) of the sensor fiber (1). It is thereby possible to achieve an at least approximately temperature-independent sensor signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.