Fiberoptic current sensor having a plurality of sensor heads

Details Fiberoptic current sensor having a plurality of sensor heads Fiberoptic current sensor having a plurality of sensor heads

2006-05-16

2006-05-16

Kianni, Kaveh (Department: 2883)

Optical waveguides

Optical waveguide sensor

C385S013000, C385S014000

Reexamination Certificate

active

07046867

ABSTRACT:
The invention relates to a fiberoptic current or magnetic field sensor having a plurality of sensor heads, and to a corresponding measurement method. The sensor has a light source: N≧2 sensor heads; at least one phase modulation unit; a detector; a control and evaluation unit. The at least one phase modulation unit is connected to at least one of the sensor heads. Lightwaves can be differentially phase-modulated in a non-reciprocal fashion by means of the at least one phase modulation unit. Modulation amplitudes φ0,nand modulation frequencies vnare selected as a function of modulation-relevant optical path lengths ln.

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