Current sensor

Details Current sensor Current sensor

2005-05-10

2005-05-10

Lee, Andrew H. (Department: 2877)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

Reexamination Certificate

active

06891622

ABSTRACT:
A method and device for measuring the current in a conductor are presented. They utilize the Faraday effect on counter-propagating circularly polarized beams of light in a fiber optic coil. The light beams are transformed to and from circular polarization by a polarization transformer comprised of a birefringent fiber with a twist through an appropriate angle at an appropriate distance from one end.

REFERENCES:
patent: 4564289 (1986-01-01), Spillman, Jr.
patent: 4571650 (1986-02-01), Ojima et al.
patent: 4630229 (1986-12-01), D'Hondt
patent: 4630890 (1986-12-01), Ashkin et al.
patent: 4637722 (1987-01-01), Kim
patent: 4668264 (1987-05-01), Dyott
patent: 4669814 (1987-06-01), Dyott
patent: 4697876 (1987-10-01), Dyott
patent: 4705399 (1987-11-01), Graindorge et al.
patent: 4712866 (1987-12-01), Dyott
patent: 4740085 (1988-04-01), Lim
patent: 4755021 (1988-07-01), Dyott
patent: 4756589 (1988-07-01), Bricheno et al.
patent: 4765739 (1988-08-01), Koizumi et al.
patent: 4776700 (1988-10-01), Frigo
patent: 4796993 (1989-01-01), Sonobe et al.
patent: 4815817 (1989-03-01), Levinson
patent: 4842409 (1989-06-01), Arditty et al.
patent: 4848910 (1989-07-01), Dupraz
patent: 4883358 (1989-11-01), Okada
patent: 4887900 (1989-12-01), Hall
patent: 5033854 (1991-07-01), Matthews et al.
patent: 5048962 (1991-09-01), Kurokawa et al.
patent: 5056919 (1991-10-01), Arditty et al.
patent: 5074665 (1991-12-01), Huang et al.
patent: 5080489 (1992-01-01), Nishikawa et al.
patent: 5096312 (1992-03-01), Huang
patent: 5106193 (1992-04-01), Fesler et al.
patent: 5133600 (1992-07-01), Schröder
patent: 5135555 (1992-08-01), Coyle, Jr. et al.
patent: 5136235 (1992-08-01), Brandle
patent: 5148236 (1992-09-01), Blake et al.
patent: 5289257 (1994-02-01), Kurokawa et al.
patent: 5289258 (1994-02-01), Szafraniec et al.
patent: 5331404 (1994-07-01), Moeller et al.
patent: 5351123 (1994-09-01), Spahlinger
patent: 5359413 (1994-10-01), Chang et al.
patent: 5365338 (1994-11-01), Bramson
patent: 5412471 (1995-05-01), Tada et al.
patent: 5418881 (1995-05-01), Hart, Jr. et al.
patent: 5457532 (1995-10-01), August et al.
patent: 5459575 (1995-10-01), Malvern
patent: 5469257 (1995-11-01), Blake et al.
patent: 5469267 (1995-11-01), Wang
patent: 5471301 (1995-11-01), Kumagai et al.
patent: 5475772 (1995-12-01), Hung et al.
patent: 5493396 (1996-02-01), Sewell
patent: 5500909 (1996-03-01), Meier
patent: 5504684 (1996-04-01), Lau et al.
patent: 5513003 (1996-04-01), Morgan
patent: 5552887 (1996-09-01), Dyott
patent: 5559908 (1996-09-01), August et al.
patent: 5644397 (1997-07-01), Blake
patent: 5654906 (1997-08-01), Youngquist
patent: 5655035 (1997-08-01), Burmenko
patent: 5682241 (1997-10-01), Mark et al.
patent: 5696858 (1997-12-01), Blake
patent: 5701177 (1997-12-01), Kumagai et al.
patent: 5767509 (1998-06-01), Cordova et al.
patent: 5781675 (1998-07-01), Tseng et al.
patent: 5822487 (1998-10-01), Evans et al.
patent: 5854864 (1998-12-01), Knoesen et al.
patent: 5898496 (1999-04-01), Huang et al.
patent: 5946097 (1999-08-01), Sanders et al.
patent: 5953121 (1999-09-01), Bohnert et al.
patent: 5987195 (1999-11-01), Blake
patent: 6023331 (2000-02-01), Blake et al.
patent: 6025915 (2000-02-01), Michal et al.
patent: 6047095 (2000-04-01), Knoesen et al.
patent: 6075915 (2000-06-01), Koops et al.
patent: 6148131 (2000-11-01), Geertman
patent: 6163632 (2000-12-01), Rickman et al.
patent: 6185033 (2001-02-01), Bosc et al.
patent: 6188811 (2001-02-01), Blake
patent: 6233371 (2001-05-01), Kim et al.
patent: 6301400 (2001-10-01), Sanders
patent: 6307632 (2001-10-01), Blake
patent: 6351310 (2002-02-01), Emge et al.
patent: 6356351 (2002-03-01), Blake
patent: 6370289 (2002-04-01), Bennett
patent: 6389185 (2002-05-01), Meise et al.
patent: 6396965 (2002-05-01), Anderson
patent: 6429939 (2002-08-01), Bennett et al.
patent: 6434285 (2002-08-01), Blake et al.
patent: 6519404 (2003-02-01), Yoshida et al.
patent: 6535654 (2003-03-01), Goettsche et al.
patent: 6535657 (2003-03-01), Dyott
patent: 6539134 (2003-03-01), Dyott
patent: 6542651 (2003-04-01), Bennett
patent: 6563589 (2003-05-01), Bennett et al.
patent: 20020018212 (2002-02-01), Bennett et al.
patent: 20020025098 (2002-02-01), Dyott
patent: 20020180416 (2002-12-01), Dyott
patent: 33 05 104 (1984-08-01), None
patent: 36 15 305 (1987-11-01), None
patent: 37 42 201 (1989-06-01), None
patent: 0 551 874 (1993-07-01), None
patent: 0 586 242 (1994-03-01), None
patent: 0 686 867 (1995-12-01), None
patent: 0 722 081 (1996-07-01), None
patent: 856 737 (1998-08-01), None
patent: 0 871 009 (1998-10-01), None
patent: 0 872 756 (1998-10-01), None
patent: 07209398 (1995-08-01), None
patent: WO 9853352 (1998-11-01), None
patent: WO 0031551 (2000-06-01), None
patent: WO0036425 (2000-06-01), None
US 6,208,775, 3/2001, Dyott (withdrawn)
Ross, J.N., “The Rotation of the Polarization in Low Birefringence Monomode Optical Fibers Due to Geometric Effects,” Optical and Quantum Electronics 16 (1984): 455-461.
Alekseev et al; “ Fiber Optic Gyroscope With Suppression of Excess Noise From the Radiation Source ”, Technical Physical Letters , 24(9): 719-721, (Sep. 1998).
Blake et al., “In-Line Sagnac Interferometer Current Sensor,”IEEE, pp. 116-121 (1995).
Blake and Szafraniec, “Random Noise in PM and Depolarized Fiber Gyros”, OSA Symposium Proceedings, 1997, OWB2, pp. 122-125.
Bohnert. et al., “Field Test of Interferometric Optical Fiber High-Voltage and Current Sensors”SPIE, vol. 2360 pp. 16-19 (Feb. 1994).
Bohnert. et al., “Temperature and Vibration Insensitive Fiber-Optic Current Sensor”ABB, vol. 2360 pp 336-339 (Feb. 1994).
Burns, et al., “Excess Noise in Fiber Gyroscope Sources”, IEEE Photonics Technology Letter, vol. 2, No. 8, Aug. 1990, pp. 606-608.
Clark et al., “Application of a PLL and ALL Noise Reduction Process in Optical Sensing System,”IEEE Translations on Industrial Electronics, vol. 44, No. 1, Feb. 1997, pp. 136-138.
Dagenais et al., “Low-Frequency Intensity Noise Reduction for Fiber-Optic Sensor Applications,”Optical Fiber Sensors Conference, 1992, Jan. 29-31, pp. 177-180.
Dupraz, J.P., “Fiber-Optic Interferometers for Current Measurement: Principles and Technology”, Alsthom Review No. 9: 29-44 (Dec. 1987).
Frosio, G. and Dändliker, “Reciprocal Reflection Interferometer for a Fiber-Optic Faraday Current Sensor”, Applied Optics 33 (25): 6111-6122 (Sep. 1, 1994).
Gronau Yuval et al.; “Digital Signal Processing For An Open-Loop Fiber-Optic Gyroscope”, Applied Optics, Optical Society of America, Washington, U.S., vol. 34, No. 25, Sep. 1, 1995, pp. 5849-5853.
Killian M. Kevin; “ Pointing Grade Fiber Optic Gyroscope”, IEEE AES Systems Magazine, pp. 6-10 (Jul. 1994).
LaViolette and Bossler: “Phase Modulation Control for An Interferometric Fiber Optic Gyroscope”, IEEE Plan 90, Position Location and Navigation Symposium, Las Vegas, (Mar. 20-23, 1990).
Lefevre, “The Fiber-Optic Gyroscope”, Artech House, Boston, pp. 29-30 (1993).
McCallion and Shimazu; “ Side-Polished Fiber Provides Functionality and Transparency”, Laser Focus World, 34 (9): S19-S24, (Sep. 1, 1998).
Moeller and Burns, “1.06μm All-fiber Gyroscope with Noise Subtraction, Proceedings of the Conference on Optical Fiber Sensors”, IEEE-OSA, Monterey, CA, 1992, pp. 82-85.
Moeller and Burns, “Observation of Thermal Noise in a Dynamically Biased Fiber-Optic Gyro”, Optical Letters, 1996, vol. 21, pp. 171-173.
Nikos Drakos, “Circular Polarization States for Light, and Quarter-Wave Plates,”Computer Based Learning Unit, University of Leeds (Mar. 2, 1998).
One et al.; “ A Small-Sized, Compact, Open-loop Fibre-Optic Gyroscope with Stabilized Scale Factor”, Meas. Sci. Technol. 1: 1078-1083, (1990.
Polynkin et al.; “ All-Optical Noise-Subtraction Scheme for a Fiber-Optic Gyroscope”, Optics Letters, 25(3): 147-149, (Feb. 1, 2000).
Rabelo et al.; ȁ

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