Design and experimental analysis of fiber grating vibration demodulation system based on the 3×3 coupler

被引：0
|
作者：
滕峰成
董理科
董博
杨刚
机构：
[1] CollegeofElectricEngineering,YanshanUniversity
来源：
Optoelectronics Letters | 2010年 / 6卷 / 05期
关键词：
D O I：
暂无
中图分类号：
TN253 [光纤元件];
学科分类号：
摘要：
A novel fiber grating vibration demodulation system, based on 2×2 and 3×3 couplers, is designed. Based on the phase unwrapping algorithm, the three-way asymmetrical output of the 3×3 coupler and demodulation state characteristics of the system when the vibration signal includes high harmonic waves are analyzed in simulations. The result shows that when the three-way output is asymmetrical, the maximum deviation of demodulation signal is 1.625%, and when the vibration signal includes high harmonic waves, the maximum deviation of demodulation signal is 0.9%. The corresponding experiment is conducted. The experimental result shows that the dynamic resolution of the system is 25.22 n ε/Hzwhen the vibration pitch is 5.5 Hz.
引用
收藏
页码：388 / 391
页数：4
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