Sensor head for a fiber-optic current measuring device

Details Sensor head for a fiber-optic current measuring device Sensor head for a fiber-optic current measuring device

G - Physics

01

R

G01R 19/00 (2006.01) G01R 15/24 (2006.01) G02B 6/255 (2006.01)

Patent

CA 2114914

ABSTRACT OF THE DISCLOSURE The sensor head (1) is intended for a fiber- optic current measuring device. It exhibits a twisted low-birefringence LB fiber (14) which is guided around a current conductor (2) and serves to conduct polarized light. Using the LB fiber (14), the Faraday rotation of the polarized light, which rotation is generated by the magnetic field (H) of the current (J) to be measured, is detected. The LB fiber (14) is spliced at its two ends in each instance with one of two polarization-con- serving, light-conducting HB fibers (6, 7), one (6) of which supplies the polarized light. The two HB fibers (6, 7) are secured in each instance in the vicinity of the two splice locations (19, 20) with the absorption of the torsional force generated by the twisting of the LB fiber (14). In spite of having a simple and sturdy struc- ture, the sensor head (1) is distinguished by a high degree of measurement accuracy. (Single Figure)

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