摘要
相位载波解调技术是用于光纤传感器中的一种重要的信号解调技术。简要说明了Mach-Zehnder干涉型光纤传感器的检测原理,对PGC解调算法进行了详细的理论分析,并用MATLAB搭建系统进行仿真,实现了传感信号的解调。对系统中的一些关键技术进行了讨论,重点分析了系统的动态范围上限,得到动态范围上限受低通滤波器、待测信号频率和载波频率的影响趋势,结论对于设计干涉型光纤传感系统有重要的理论指导意义和参考价值。
The phase generated carrier（PGC）demodulation scheme is one of the important signal demodulation schemes used for fiber-optic sensors.The detection principle of Mach-Zehnder fiber-optic interference sensors is introduced.Detailed mathematical deduce on the phase generated carrier demodulation algorithm is given.MATLAB simulation is implemented to illuminate the feasibility of the method.Some of the important technologies of the system are discussed.The upper limitation of detecting dynamic range is analyzed and the effects of some parameters are got.These results on designing interference fiber-optic sensing system have the significant theoretical guidance and important reference value.
出处
《光电技术应用》
2011年第5期47-50,共4页
Electro-Optic Technology Application
基金
教育部重大项目"新型分布式波分纤分全光交换网结构及关键技术器件的研究"(308002)
关键词
干涉型光纤传感器
光纤干涉仪
相位载波(PGC)
fiber-optic interference sensors
optical fiber interferometer
phase generated carrier（PGC）
