Results 241 to 250 of about 8,813,533 (289)

Linear birefringence effects on fiber-optic current sensors

Applied Optics, 1988
The 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, 1992
The 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, Nobuo Seki, Takashi Suzuki Takashi Suzuki, Toru Tsukamoto Toru Tsukamoto   +3 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), 2002
Fiber 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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Computer Modeling of Fiber Optic Current Sensor

2020
Despite 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, Andrei Medvedev, Alexey Mayzel   +2 more
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Current sensor utilizing a fiber-optic waveguide

Soviet Journal of Quantum Electronics, 1983
A 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, V I Kreopalov, V N Listvin, N A Glavatskikh   +3 more
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Development of Optical Fiber Current Sensors and Their Applications

2005 IEEE/PES Transmission & Distribution Conference & Exposition: Asia and Pacific, 2005
In this paper, a development of optical fiber current sensors is presented, and examples of their applications are also introduced. Optical fiber current sensors based on the Faraday effect were expected for a long lime as compact and high performance current sensors in place of conventional current transformers.
K. Kurosawa, K. Shirakawa, T. Kikuchi
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Novel Chirped Fiber Optic Current Sensor

Frontiers in Optics 2012/Laser Science XXVIII, 2012
We present a rugged magnetostriction-based optical current sensor with wide dynamic range. It consists of a fiber Bragg grating embedded in a tapered polymer block converting magnetostrictive strain into frequency chirp proportional to magnetic field.
Aaron Mueller, Suha Mubarak Lasassmeh, Chiu Tai Law   +2 more
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Temperature compensation of fiber-optic current sensors

SPIE Proceedings, 2014
We 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, Lin Yang, Berkan Gülenaltin, Andreas Frank, Klaus Bohnert   +4 more
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Linearization of fiber-optic polarimetric current sensors

Optics Communications, 1991
Abstract 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, 2003
A 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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