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Differential measurement scheme for Brillouin Optical Correlation Domain Analysis
- Issue Date
- Nov-2012
- Publisher
- OPTICAL SOC AMER
- Citation
- OPTICS EXPRESS, v.20, no.24, pp 27094 - 27101
- Pages
- 8
- Journal Title
- OPTICS EXPRESS
- Volume
- 20
- Number
- 24
- Start Page
- 27094
- End Page
- 27101
- ISSN
- 1094-4087
- Abstract
- We newly propose and experimentally demonstrate a differential measurement scheme for Brillouin optical correlation domain analysis, where the difference between Brillouin gain spectra constructed by a normal and a phase-modulated Brillouin pump waves are analyzed to measure local Brillouin frequencies in optical fibers. In experiments, a fivefold enhancement in the spatial resolution is obtained compared to an ordinary BOCDA system under the same modulation parameters, as a result of the improved dynamic range by the suppression of background noises. (C) 2012 Optical Society of America
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