Fiber-Optic Distributed Strain Sensing System by Brillouin Optical Correlation Domain Analysis with a Simple and Accurate Time-Division Pump-Probe Generation Scheme
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- Hotate Kazuo
- Department of Electronic Engineering, School of Engineering, The University of Tokyo
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- Yamauchi Toyohiko
- Department of Electronic Engineering, School of Engineering, The University of Tokyo
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Abstract
A simplified and accurate system of Brillouin optical correlation domain analysis for fiber-optic distributed strain sensing is proposed and demonstrated. In the system, pump and probe lightwaves, with about 11 GHz frequency difference for stimulating fiber Brillouin scattering, are generated accurately in a time-division way by using direct-frequency-modulation nature of a laser diode. We have developed a scheme for rigorously compensating frequency modulation response of the laser diode to realize accurately a rectangular frequency modulation with such large amplitude for the time-division pump-prove generation. Distribution of Brillouin gain spectrum along an optical fiber has successfully been measured, with 16 cm spatial resolution, using the waveform pre-compensated accurately for the laser frequency modulation.
Journal
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 44 (28-32), L1030-L1033, 2005
The Japan Society of Applied Physics
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Keywords
Details 詳細情報について
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- CRID
- 1390282681243254528
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- NII Article ID
- 10016681796
- 210000059262
- 130004533449
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- NII Book ID
- AA11906093
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- ISSN
- 13474065
- 00214922
- http://id.crossref.org/issn/13474065
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- NDL BIB ID
- 7385128
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed