| 一种消除伴生调幅的光源调频型相位生成载波解调方法 |
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| 引用本文： | 施清平.一种消除伴生调幅的光源调频型相位生成载波解调方法[J].光电子．激光,2011(2):180-184. |
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| 作者姓名： | 施清平 |
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| 作者单位： | 清华大学精密仪器与机械学系精密测试技术及仪器国家重点实验室;清华大学电子工程系光纤传感研究中心; |
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| 基金项目： | 国家“863”计划资助项目(2006AA0AA102-03) |
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| 摘 要： | 为了克服伴生调幅对光源调频型相位生成载波(PGC)解调方法的影响,提出一种基于双路干涉信号和微分-交叉相乘(DCM,differential-cross multiply)的PGC解调方法.通过3×2耦合器引入双路干涉信号,直接调制光源频率获得相位载波.实验结果表明,新方法较好地消除了光源伴生调幅的影响.对于4 rad...
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| 关 键 词： | 干涉型光纤传感器 直接调制 伴生调幅 相位生成载波(PGC) |
Frequency-modulated phase generated carrier demodulation for eliminating companion amplitude modulation |
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| SHI Qing-ping.Frequency-modulated phase generated carrier demodulation for eliminating companion amplitude modulation[J].Journal of Optoelectronics·laser,2011(2):180-184. |
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| Authors: | SHI Qing-ping |
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| Affiliation: | SHI Qing-ping1,2,WANG Li-wei2,ZHANG Min2,TIAN Qian1,LIAO Yan-biao2(1.State Key Laboratory of Precision Measurement Technology and Instruments,Department of Precision Instruments and Mechanology,Tsinghua University,Beijing 100084,China,2.Optical Fiber Sensor Laboratory,Department of Electronic Engineering,China) |
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| Abstract: | In order to eliminate the effect of amplitude modulation in the source with direct frequency modulation(DFM) on phase generated carrier(PGC) demodulation approach,a new PGC method was proposed based on differential-cross multiply(DCM) and double interferometric signals by a 3×2 directional coupler.Experimental results confirm that the new scheme has eliminated the effect of the companion amplitude modulation on demodulation very well.For a demodulation signal of 4 rad,the total signal-harmonic-r... |
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| Keywords: | interferometric optical fiber sensor direct modulation companion amplitude modulation phase generated carrier(PGC) |
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