Optical voltage sensor

Details Optical voltage sensor Optical voltage sensor

2011-03-22

2011-03-22

Patel, Paresh (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Using radiant energy

Reexamination Certificate

active

07911196

ABSTRACT:
A voltage sensor includes two optical sensing fibers and a control unit. The sensing fibers carry a first mode of light and a second mode of light, which are orthogonally polarized, with a birefringence between the two modes depending on the electric voltage to be measured. The control unit is configured to generate light for the two modes in the sensing element and to measure the phase delay suffered between the two modes. A 45° Faraday rotator is arranged between the control unit and the sensing fibers. The Faraday rotator allows the behavior and functionality of the sensing fibers and their associated components to be converted to those of a magneto-optical current sensors with polarization-rotated reflection, which in turn allows use of advanced measuring techniques developed for optical gyroscopes and current sensors.

REFERENCES:
patent: 4253061 (1981-02-01), Ono et al.
patent: 4269483 (1981-05-01), Feldtkeller
patent: 4564289 (1986-01-01), Spillman
patent: 4939447 (1990-07-01), Bohnert et al.
patent: 5715058 (1998-02-01), Bohnert et al.
patent: 6122415 (2000-09-01), Blake
patent: 6636321 (2003-10-01), Bohnert
patent: 7006287 (2006-02-01), Chen et al.
patent: 2002/0006244 (2002-01-01), Bohnert
patent: 0 316 619 (1989-05-01), None
patent: 0 316 635 (1989-05-01), None
patent: 0 682 261 (1995-11-01), None
patent: 1 154 278 (2001-11-01), None
International Search Report (PCT/ISA/210) for PCT/CH2006/000734 dated Aug. 29, 2007.
Written Opinion (PCT/ISA/237) for PCT/CH2006/000734 dated Aug. 29, 2007.
K. Bohnert et al., “Temperature and Vibration Insensitive Fiber-Optic Current Sensor”, Journal of Lightwave Technology, Feb. 2002, pp. 267-276, vol. 20, No. 2.
K. Bohnert et al., “Coherence-Tuned Interrogation of a Remote Elliptical-Core, Dual-Mode Fiber Strain Sensor”, Journal of Lightwave Technology, Jan. 1995, pp. 94-103, vol. 13, No. 1.
K. Bohnert et al., “Fiber-Optic Sensing of Voltages by Line Integration of the Electric Field”, Optics Letters, Mar. 1, 1989, pp. 290-292, vol. 14, No. 5.
K. Bohnert et al., “Fiber-Optic DC Current Sensor for the Electro-Winning Industry”, 17th Int. Conference on Optical Fibre Sensors, Bruges, Belgium, May 23-27, 2005, Proc. of SPIE, pp. 120-213, vol. 5855.
H. Lefevre, “The Fiber-Optic Gyroscope”, Chapter 2—Principle of the Fiber-Optic Gyroscope, pp. 5-26, Chapter 8—Scale Factor Accuracy, pp. 107-133, and Chapter 10—Alternative Approaches for the I-FOG, pp. 147-157, 1993, Artech House, Boston, MA, USA.
Y. Fujii, “High-Isolation Polarization-Independent Quasi-Optical Circulator”, Journal of Lightwave Technology, Sep. 1992, pp. 1226-1229, vol. 10, No. 9.
A. Ortigosa-Blanch et al., “Highly Birefringent Photonic Crystal Fibers”, Optics Letters, Sep. 15, 2000, pp. 1325-1327, vol. 25, No. 18.
J. Noda et al., “Polarization-Maintaining Fibers and Their Applications”, Journal of Lightwave Technology, Aug. 1986, pp. 1071-1089, vol. LT-4, No. 8.

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