Rugged fiber-optical current sensor based on the Faraday effect

Details Rugged fiber-optical current sensor based on the Faraday effect Rugged fiber-optical current sensor based on the Faraday effect

1990-11-29

1992-08-04

Nguyen, Vinh

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

324117R, 3242441, 25022717, 356351, G01R 33032, H01J 516

Patent

active

051362350

ABSTRACT:
A fiber-optical current transformer including a sensor coil, operated in reflection mode, with a sensor fiber (5) for detecting a current utilizing of the Faraday effect. A light source (1) couples light into an incoming first HB fiber (2a). At the end of the first HB fiber (2a), a fiber-optical polarizer (4) is preferably located which ensures a direction of polarization in parallel with a given birefringence axis of the first HB fiber (2a). A Y splitter (3) couples, on the one hand, the supplied light of the first HB fiber (2a) into the sensor fiber (5) and, on the other hand, the light coming from the sensor fiber (5) into an outgoing second HB fiber (2b). The second HB fiber (2b) is rotated with its birefringence axes by 45.degree. with respect to the birefringence axes of the first HB fiber (2a).

REFERENCES:
patent: 3502978 (1970-03-01), Bernard et al.
patent: 4442350 (1984-04-01), Rashleigh
patent: 4560867 (1985-12-01), Papuchon et al.
patent: 4797607 (1989-01-01), Dupraz
patent: 4947107 (1990-08-01), Doerfler et al.
patent: 4973899 (1990-11-01), Jones et al.
patent: 5051577 (1991-09-01), Lutz et al.
IEE Proceedings, vol. 135, No. 5, Oct. 1988, pp. 372-383, S. Donati, et al., "Magneto-Optical Fibre Sensors for Electrical Industry:Analysis of Performances".
IEEE Journal of Quantum Electronics, vol. QE-18, No. 4, Apr. 1982, pp. 477-488, D. N. Payne, et al., "Development of Low- and High-Birefringence Optical Fibers".
Optical and Quantum Electronics 16 (1984), pp. 455-461, J. N. Ross, "The Rotation of the Polarization in Low Birefringence Monomode Optical Fibres Due to Geometric Effects".
Electronics Letters, Oct. 9, 1986, vol. 22, No. 21, pp. 1142-1144, L. Li, et al., "Current Sensors Using Highly Birefringent Bow-Tie Fibres".
Applied Physics, vol 28, No. 11, Jun. 1, 1989, pp. 2012-2016, K. Kawano, et al., "Efficient Highly Stable Laser Diode Module for Single-Mode Fiber Employing a Combination of Hemispherical Ended Grin Rod Lens and Virtual Fiber".

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