[OPTICAL REVIEW Vol. 4, No. 1A (1997) 45-49]

Optical Fiber Current Sensors Using Garnet Crystal for Power Distribution Fields

Satoshi ISHIZUKA, Nobuki ITOH and Hisashi MINEMOTO

Multimedia Systems Research Laboratory, Matsushita Electric Industrial Co., Ltd., 3-1-1, Yagumo Nakamachi, Moriguchi, Osaka, 570 Japan

(Received July 2, 1996; Accepted September 9, 1996)

We introduce applied examples (already put to practical use) of power distribution fields of optical fiber current sensors using iron garnet crystal that have high sensitivity, high linearity and stable temperature characteristics. We also describe two types of new optical fiber current sensors developed recently aimed at cost reduction and high performance.

Key words : optical fiber current sensor, iron garnet, power distribution