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 »
- 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}
}