A fiber-optic current sensor based on a differentiating Sagnac interferometer

• Published in: IEEE transactions on instrumentation and measurement Vol. 50; no. 3; pp. 705 - 708
• Main Authors: Wang, Tingyu, Luo, Chengmu, Zheng, Shengxuan
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2001; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Coils; Current measurement; Electric variables measurement; Optical fiber sensors; Phase measurement; Piezoelectric transducers; Power measurement; Sagnac interferometers; Sensor systems; Temperature sensors

A fiber-optic current sensor (FOGS) based on a differentiating Sagnac interferometer (DSI) is demonstrated to measure high-voltage ac current in electric power systems from 5 A to 3200 A. A transducer consisting of Rogowski coil and piezoelectric cylinder (PZT) is used as the phase modulator, which...