A novel method for simultaneous measurement of current and voltage using one low-birefringence fiber

• Published in: Optics and laser technology Vol. 30; no. 5; pp. 257 - 262
• Main Authors: Wang, Zhaobing, Liao, Yanbiao, Lai, Shurong, Zhao, Huafeng, Chen, Xiangxun
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-07-1998; Elsevier Science
• Subjects: Applied sciences; Circuit properties; Current sensing; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fiber-optic instruments; General equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Integrated optics. Optical fibers and wave guides; Optical and optoelectronic circuits; Optical fiber sensor; Optical instruments, equipment and techniques; Physics; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; Sensors, gyros; Simultaneous measurement; Voltage sensing; Voltage sensing; Current sensing; Optical fiber sensor; Simultaneous measurement; Kerr effect; Voltage measurement; Current measurement; Measuring methods; Experimental study; Fiber optic sensors
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/S0030-3992(98)00018-8

A novel method for simultaneous measurement of current and voltage employing a single monomode low-birefringence (Lo-Bi) fiber is described. This uses the Faraday effect for detection of current and the Kerr effect for detection of voltage. The waveform of the output light intensity due to the Kerr effect has been detected and the Kerr constant was measured as 5.4×10
−16 m/V
−2 at 25°C. Theoretical analysis shows that the current component can be measured free from the influence of the voltage component and the two components can be easily separated.