Abstract

In this second part, the most important components of a magnetooptical current transformer are described and their suitability is discussed. Today He–Ne gas lasers and laser diodes seem to meet best the requirements of the light source. Single-mode optical fibers are capable of transmitting polarized light without depolarization. A fiber coil wound on a special coil former is used as a measuring sensor. Two P-I-N photodiodes, together with an analog electronic circuit, transform the optical into an electrical measuring signal.

© 1980 Optical Society of America

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