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Optical Engineering, 2003
When a current passes through a metal-coated optical fiber, the Ohm's heat induces a phase change of the guided light within the fiber. This microampere current sensor is principally designed based on this thermal effect.A Michelson interferometer is used for detecting this phase change.
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When a current passes through a metal-coated optical fiber, the Ohm's heat induces a phase change of the guided light within the fiber. This microampere current sensor is principally designed based on this thermal effect.A Michelson interferometer is used for detecting this phase change.
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Linear birefringence effects on fiber-optic current sensors
Applied Optics, 1988The occurrence of linear birefringence is inevitable when dealing with fiber optics. Intrinsic birefringence can be minimized, but deploying the fiber on an experiment will introduce stress birefringence due to bending and pressure. We have studied the effects of this extraneous linear birefringence on the measurement of current-induced circular ...
P R, Forman, F C, Jahoda
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Plastic Fiber Optical Isolator and Current Sensor
Japanese Journal of Applied Physics, 1992The Verdet constant of poly-α-methylstyrene fiber doped with a biphenyl compound showed a value beyond 0.09 min·Oe-1·cm-1 at 488 nm. The optical fiber isolator for the 488-nm laser, which was constructed using the above plastic fiber and a pulse magnetic field, had about 20-dB isolation.
Shinzo Muto +3 more
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Temperature compensation of fiber-optic current sensors
SPIE Proceedings, 2014We report the first fabrication of polarization rocking filters in a highly birefringent elliptical microfiber. The rocking filters are made by periodically heating/twisting a microfiber with an ellipticity of ~0.7 and a diameter of ~2.8 μm along its major axis.
Georg M. Müller +4 more
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Fiber optic current sensor calibration
2001 IEEE/PES Transmission and Distribution Conference and Exposition. Developing New Perspectives (Cat. No.01CH37294), 2002Fiber optic current sensors have been touted for their potential ability to measure currents with accuracy better than 0.1% over a dynamic range extending from literally milliamps to hundreds of kiloamps. Such claims have a good theoretical basis but it is quite difficult to verify such claims, especially at the two extremes of this range. At the lower
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Current sensor utilizing a fiber-optic waveguide
Soviet Journal of Quantum Electronics, 1983A study was made of the influence of homogeneous and circular magnetic fields on a single-mode optical fiber exhibiting linear birefringence and wound into a coil with a circumference equal to the beat length. It was found that the sensitivity of a current sensor based on such a fiber can be as high as that of sensors utilizing an isotropic fiber.
S M Kozel +3 more
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Linearization of fiber-optic polarimetric current sensors
Optics Communications, 1991Abstract A linearization technique for a fiber-optic current sensor based on the magneto-optical effect is described. The linearization is achieved by an optimized polarizer orientation. Particular attention is payed to the use of several kinds of optical fibers. The influence of linear birefringence on the output signal is discussed.
H. Hirsch, D. Peier
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Fiber optic microampere dc current sensor
Optical Engineering, 2003A microampere dc current is measured by a fiber optic sen- sor. The phase change of the guided light induced by ohm's heat over a golden-coated fiber is detected by an interferometer. The thermal con- duction of the optical fiber and the relation of the temperature-induced phase change of the guided light are explored. A Michelson interferom- eter plus
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Computer Modeling of Fiber Optic Current Sensor
2020Despite all the advantages of using the fiber optic current sensors in high-voltage power networks, this technology has the significant weaknesses. They are the instability of the sensor readings and insufficient measurement accuracy. We observed parasitic response to the set of the entire factors in the real prototype of the fiber optic current sensor.
Valentina Temkina +2 more
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Reciprocal-compensated fiber optic electric current sensor
SPIE Proceedings, 1994The great interest in fiber optic current sensors results from their inherently high voltage isolation which eliminates the ground loop difficulty. Moreover fiber optic cunent sensors have the advaiitages of wide bandwidth, immunity to electromagnetic interference, low cost, and small size, over the traditional mutual inductance type current ...
Xiaojun Fang +4 more
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