Abstract
This paper describes the development and applications of a fiber-optic electric current sensing technique
with stable properties and sensing devices with a compact, simple, and flexible structure. We achieved
special sensor characteristics with a low birefringence fiber as the Faraday-effect sensing element and
also created sensing schemes that matched the fiber's features. By exploiting the sensing technique’s
excellent features, we developed various current monitoring devices and systems and applied them at an
electric power facility.
