| Enhancement of signal-noise-ratio in a distributed polarization mode coupling detection system |
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| 作者姓名： | JING Wen-cai LI Xiao-jingi LIU Kun XU Tian-hua ZHANG Yi-mo ZHANG Hong-xia JIA Da-gong PENG Gang-Ding |
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| 作者单位： | [1]College of Precision Instrument ＆ Opto-electronics Engineering, Natioual Education ministry Key Laboratory of Optoelectronics Information and Technical Science, Tianjin University, Tianjin 300072, China [2]School of Electrical Engineering and Telecommunications, University of New South Wales, Australia |
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| 基金项目： | the National Natural Science Fundof China (No. 60377031), the National Basic Research Program ofChina (No. 2003CB314907), and the Program for New Century Ex-cellent Talents in University |
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| 摘 要： | White-light interferometry (WLI) is an efficient method for measurement of strain, twist, temperature, and many other physical parameters in fiber-optic measurement systems. 1-10]. It can provide large dynamic range and high accuracy for absolute measurements of displacement and strain. Meanwhile, it is not sensitive to optical power fluctuation 6]. WLI based on optic sensors are immune to electromagnetic interference, suitable for harsh environments and compat- ible with optical fiber dat…
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| 关 键 词： | 分布式极化模耦合检测系统 信噪比 增强 极化 降噪 小波变换 |
| 文章编号： | 1673-1905（2007）01-0057-05 |
| 收稿时间： | 2006-10-10 |
Enhancement of signal-noise-ratio in a distributed polarization mode coupling detection system |
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| JING Wen-cai LI Xiao-jingi LIU Kun XU Tian-hua ZHANG Yi-mo ZHANG Hong-xia JIA Da-gong PENG Gang-Ding.Enhancement of signal-noise-ratio in a distributed polarization mode coupling detection system[J].Opto-electronics Letters,2007,3(1):57-61. |
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| Authors: | Wen-cai Jing Xiao-jingi Li Kun Liu Tian-hua Xu Yi-mo Zhang Hong-xia Zhang Da-gong Jia and Gang-Ding Peng |
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| Affiliation: | (1) College of Precision Instrument & Opto-electronics Engineering, Natioual Education ministry Key Laboratory of Optoelectronics Information and Technical Science, Tianjin University, Tianjin, 300072, China;(2) School of Electrical Engineering and Telecommunications, University of New South Wales, Australia |
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| Abstract: | A distributed polarization-mode coupling measurement system was designed and implemented using white light interferometry. It can be used for the measurement of polarization mode coupling in a high-birefringence fiber of up to 1 km. This system can be used in both fiber-optic sensors and optical fiber communications. Wavelet Transform was adopted in data processing to improve the signal-noise-ratio. The signal-noise-ratio of this system was improved more than 15 dB after denoising. The influence of denoising threshold on signal-noise-ratio and measurement accuracy was also discussed. Hilbert Transform and non-linear regression can be used in conjunction with Wavelet Transform to enhance the signal-noise-ratio and spatial resolution of this system. |
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| Keywords: | Wavelet transform denoising polarization |
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