| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Stimulated Brillouin scattering-induced phase noise in an interferometric fiber sensing system |
| Chen Wei(陈伟), Meng Zhou(孟洲)†, Zhou Hui-Juan(周会娟), and Luo Hong(罗洪) |
| Department of Optic Information Science and Technology, College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract Stimulated Brillouin scattering-induced phase noise is harmful to interferometric fiber sensing systems. The localized fluctuating model is used to study the intensity noise caused by the stimulated Brillouin scattering in a single-mode fiber. The phase noise structure is analyzed for an interferometric fiber sensing system, and an unbalanced Michelson interferometer with an optical path difference of 1 m, as well as the phase-generated carrier technique, is used to measure the phase noise. It is found that the phase noise is small when the input power is below the stimulated Brillouin scattering threshold, increases dramatically at first and then gradually becomes flat when the input power is above the threshold, which is similar to the variation in relative intensity noise. It can be inferred that the increase in phase noise is mainly due to the broadening of the laser linewidth caused by stimulated Brillouin scattering, which is verified through linewidth measurements in the absence and presence of the stimulated Brillouin scattering.
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Received: 01 September 2011
Revised: 13 September 2011
Accepted manuscript online:
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PACS:
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42.65.Es
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(Stimulated Brillouin and Rayleigh scattering)
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78.35.+c
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(Brillouin and Rayleigh scattering; other light scattering)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61177073), the Open Fund of Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Jinan University, China (Grant No. gdol201101), the Fund of Innovation of Graduate School of NUDT, China (Grant No. B110703), and Hunan Provincial Innovation Foundation for Postgraduate, China (Grant No. CX2011B033). |
Corresponding Authors:
Meng Zhou,zhoumeng6806@163.com
E-mail: zhoumeng6806@163.com
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Cite this article:
Chen Wei(陈伟), Meng Zhou(孟洲), Zhou Hui-Juan(周会娟), and Luo Hong(罗洪) Stimulated Brillouin scattering-induced phase noise in an interferometric fiber sensing system 2012 Chin. Phys. B 21 034212
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