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In-line D-fiber electric field sensor using chiral liquid crystals. Chandani, Sameer M.; Jaeger, Nicolas A. F.; Shao, R.-F.; Maclennan, J. E.
Abstract
Optical electric field sensors have been used for the measurement of high-voltages found in power substations. Typical sensors are based on electro-optic crystals and hence require the coupling of light into and out of the crystals from optical fibers. This coupling is difficult and costly. The objective of the work presented here is the design and implementation of an optical electric field sensor that uses an entirely fiber-based sensor-head. The sensor-head is comprised of a D-shaped optical fiber with its flat side coated with liquid crystals. D-fibers allow easy access to the evanescent optical field and replacement of part of the cladding with an external medium allows for modulation of this optical field. We are investigating the use of chiral Smectic A liquid crystals, which respond linearly to electric fields through the electroclinic effect. The propagation characteristics of the D-fiber for various distances between the fiber core edge and flat and for various refractive indices of the external medium are theoretically investigated and experimentally verified. Preliminary experimental results for a prototype electric field sensor are presented. The sensor responds in a linear fashion to an applied electric field. Copyright 2006 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Item Metadata
| Title |
In-line D-fiber electric field sensor using chiral liquid crystals.
|
| Creator | |
| Publisher |
Society of Photo-Optical Instrumentation Engineers (SPIE)
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| Date Issued |
2006
|
| Description |
Optical electric field sensors have been used for the measurement of high-voltages found in power substations.
Typical sensors are based on electro-optic crystals and hence require the coupling of light into and out of
the crystals from optical fibers. This coupling is difficult and costly. The objective of the work presented
here is the design and implementation of an optical electric field sensor that uses an entirely fiber-based
sensor-head. The sensor-head is comprised of a D-shaped optical fiber with its flat side coated with liquid
crystals. D-fibers allow easy access to the evanescent optical field and replacement of part of the cladding
with an external medium allows for modulation of this optical field. We are investigating the use of chiral
Smectic A liquid crystals, which respond linearly to electric fields through the electroclinic effect. The
propagation characteristics of the D-fiber for various distances between the fiber core edge and flat and for
various refractive indices of the external medium are theoretically investigated and experimentally verified.
Preliminary experimental results for a prototype electric field sensor are presented. The sensor responds in
a linear fashion to an applied electric field.
Copyright 2006 Society of Photo-Optical Instrumentation Engineers.
One print or electronic copy may be made for personal use only. Systematic reproduction and distribution,
duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
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| Genre | |
| Type | |
| Language |
eng
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| Date Available |
2011-06-07
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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| DOI |
10.14288/1.0107528
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| URI | |
| Affiliation | |
| Citation |
Chandani, Sameer M.; Jaeger, Nicolas A.F.; Shao, R.-F.; Maclennan, J.E. In-line D-fiber electric field sensor using chiral liquid crystals. Photonics North 2006, edited by Pierre Mathieu, Proceedings of SPIE Volume 6343, 634317, 2006.
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| Publisher DOI |
10.1117/12.707707
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| Peer Review Status |
Reviewed
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| Scholarly Level |
Faculty
|
| Copyright Holder |
Jaeger, Nicolas A. F.
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| Rights URI | |
| Aggregated Source Repository |
DSpace
|
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Rights
Attribution-NonCommercial-NoDerivatives 4.0 International