| 干涉型光纤传感器相位生成载波技术研究与改进 |
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| 引用本文： | 王利威,刘阳,张敏,廖延彪.干涉型光纤传感器相位生成载波技术研究与改进[J].光子学报,2009,38(4):766-769. |
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| 作者姓名： | 王利威 刘阳 张敏 廖延彪 |
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| 作者单位： | 清华大学,电子工程系光纤传感实验室,北京,100084 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 对干涉型光纤传感器的相位生成载波解调技术进行了研究.对PGC算法进行了数学推导和仿真计算,对数字低通滤波器进行了详细分析,给出了其影响PGC解调性能的原因及数字滤波器的设计方法.讨论了传感器干涉光强对PGC算法输出结果的影响,提出了改进的PGC算法,该算法可以有效的实现自动增益控制,消除干涉光强漂移对解调的影响,并大大减小由干涉光强引入的系统噪音;还可以在有限阶数低通滤波器的情况下,极大的增加系统可解调的大信号幅度,提高系统动态范围12 dB以上.
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| 关 键 词： | 干涉型光纤传感器 相位生成载波 滤波器 自动增益控制 |
| 收稿时间： | 2007-10-08 |
| 修稿时间： | 2008-01-10 |
Analysis and Improvement of the Phase Generator Carrier Method in Fiber Interferometer Sensors |
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| WANG Li-wei,LIU Yang,ZHANG Min,LIAO Yan-biao.Analysis and Improvement of the Phase Generator Carrier Method in Fiber Interferometer Sensors[J].Acta Photonica Sinica,2009,38(4):766-769. |
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| Authors: | WANG Li-wei LIU Yang ZHANG Min LIAO Yan-biao |
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| Institution: | Department of Electronic Engineering,Tsinghua University,Beijing 100084,China |
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| Abstract: | The Phase Generator Carrier(PGC)method in fiber interferometer was proposed and investigated.The digitized PGC demodulation was mathematically deduced,calculated and emulated.The key technology digital low pass filter is analyzed detailedly,the reason why the filter influence the performance of the PGC demodulation and the design method of the filter is presented.The influence of the sensor light power to the output of the PGC demodulation is discussed.The modification of the PGC demodulation algorithm is i... |
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| Keywords: | Fiber interferometer sensors Phase Generator Carrier (PGC) Digital Filter Auto Gain Control (AGC) |
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