Yn. Ning et al., A FARADAY CURRENT SENSOR USING A NOVEL MULTI-OPTICAL-LOOP SENSING ELEMENT, Measurement science & technology, 6(9), 1995, pp. 1339-1342
The design and the performance of an optically based, Faraday current
sensing system employing a novel sensing element, using the so-called
'complementary reflections' scheme, is reported. This new design not o
nly increases the overall sensitivity of the device by a factor of thr
ee, but also makes it easy to align the current measuring element in t
he system. With the use of this new optical element, a sensitivity of
6.57 x 10(-5) rad A(-1) and a minimum detectable current of 11.3 mA Hz
(-1/2) have been achieved.