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14 September 1994 Faraday-effect current sensor with improved sensitivity-bandwidth product
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Proceedings Volume 2360, Tenth International Conference on Optical Fibre Sensors; (1994) https://doi.org/10.1117/12.185076
Event: 10th Optical Fibre Sensors Conference, 1994, Glasgow, United Kingdom
Abstract
We report a new design for a Faraday effect current sensor based on yttrium iron garnet. The improved sensor has substantially greater bandwidth than previous designs and is considerably easier to fabricate. The measured sensitivity is 0.7°/A with a -3 dB bandwidth of 500 MHz, giving a factor of 45 increase in sensitivity-bandwidth product. A noise-equivalent current of 840 nA/Hzl/2 was measured at 1.8 kHz using difference-over-sum processing. The use of newly developed turning prisms with phasepreserving coatings greatly simplifies construction, improves electrical isolation, and increases sensitivity through proximity effects.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kent B. Rochford, Allen H. Rose, Merritt N. Deeter, and Gordon W. Day "Faraday-effect current sensor with improved sensitivity-bandwidth product", Proc. SPIE 2360, Tenth International Conference on Optical Fibre Sensors, (14 September 1994); https://doi.org/10.1117/12.185076
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