| 摘要 |
The fiber-optic sensor head ( 2 ) for a current or magnetic field sensor comprises an optical fiber which contains a magnetooptically active sensor fiber ( 3 ) and at least one polarization-maintaining supply fiber ( 5 ), which are optically connected, with the sensor fiber ( 3 ) having its fiber protective sheath removed. The sensor head ( 2 ) furthermore contains a capillary ( 6 ), in which at least the sensor fiber ( 3 ) is arranged. Furthermore, the sensor head ( 2 ) can be bent in the area of the sensor fiber ( 3 ), and a friction reducing means ( 7 ) is provided in the capillary ( 6 ), in order to reduce the friction between the sensor fiber ( 3 ) and the capillary ( 6 ). The friction reducing means ( 7 ) is advantageously an oil or a dry lubricating means ( 7 ). The capillary ( 6 ) is advantageously encased by a capillary casing ( 8 ). The sensor ( 2 ) allows very largely temperature-dependent measurements, is easy to install and allows measurements on large cross-section conductors.
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