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Title: Electro-optic voltage sensor head

Abstract

The invention is an electro-optic voltage sensor head designed for integration with existing types of high voltage transmission and distribution apparatus. The sensor head contains a transducer, which comprises a transducing material in which the Pockels electro-optic effect is observed. In the practice of the invention at least one beam of electromagnetic radiation is routed into the transducing material of the transducer in the sensor head. The beam undergoes an electro-optic effect in the sensor head when the transducing material is subjected to an E-field. The electro-optic effect is observed as a differential phase a shift, also called differential phase modulation, of the beam components in orthogonal planes of the electromagnetic radiation. In the preferred embodiment the beam is routed through the transducer along an initial axis and then reflected by a retro-reflector back substantially parallel to the initial axis, making a double pass through the transducer for increased measurement sensitivity. The preferred embodiment of the sensor head also includes a polarization state rotator and at least one beam splitter for orienting the beam along major and minor axes and for splitting the beam components into two signals which are independent converse amplitude-modulated signals carrying E-field magnitude and hence voltagemore » information from the sensor head by way of optic fibers. 6 figs.« less

Inventors:
; ;
Publication Date:
Research Org.:
Lockheed Martin Idaho Tech Co
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
678602
Patent Number(s):
US 5,939,711/A/
Application Number:
PAN: 8-988,247
Assignee:
Lockheed Martin Idaho Technologies Co., Idaho Falls, ID (United States)
DOE Contract Number:  
AC07-94ID13223
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 17 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; 24 POWER TRANSMISSION AND DISTRIBUTION; ELECTRIC MEASURING INSTRUMENTS; ELECTRIC POTENTIAL; ELECTRO-OPTICAL EFFECTS; DESIGN; POWER DISTRIBUTION SYSTEMS

Citation Formats

Crawford, T M, Davidson, J R, and Woods, G K. Electro-optic voltage sensor head. United States: N. p., 1999. Web.
Crawford, T M, Davidson, J R, & Woods, G K. Electro-optic voltage sensor head. United States.
Crawford, T M, Davidson, J R, and Woods, G K. Tue . "Electro-optic voltage sensor head". United States.
@article{osti_678602,
title = {Electro-optic voltage sensor head},
author = {Crawford, T M and Davidson, J R and Woods, G K},
abstractNote = {The invention is an electro-optic voltage sensor head designed for integration with existing types of high voltage transmission and distribution apparatus. The sensor head contains a transducer, which comprises a transducing material in which the Pockels electro-optic effect is observed. In the practice of the invention at least one beam of electromagnetic radiation is routed into the transducing material of the transducer in the sensor head. The beam undergoes an electro-optic effect in the sensor head when the transducing material is subjected to an E-field. The electro-optic effect is observed as a differential phase a shift, also called differential phase modulation, of the beam components in orthogonal planes of the electromagnetic radiation. In the preferred embodiment the beam is routed through the transducer along an initial axis and then reflected by a retro-reflector back substantially parallel to the initial axis, making a double pass through the transducer for increased measurement sensitivity. The preferred embodiment of the sensor head also includes a polarization state rotator and at least one beam splitter for orienting the beam along major and minor axes and for splitting the beam components into two signals which are independent converse amplitude-modulated signals carrying E-field magnitude and hence voltage information from the sensor head by way of optic fibers. 6 figs.},
doi = {},
url = {https://www.osti.gov/biblio/678602}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {8}
}