基于PGC解调方案的时分复用光纤传感器阵列采样频率的研究

SAMPLING-FREQUENCY ON TDM OF OPTICAL-FIBER SENSOR ARRAY USING PHRASE GENERATED CARRIER

通过对光纤传感器输出信号频谱和PGC(相位产生载波 )解调方案原理的分析 ,发现并不是所有的光纤传感器输出信号的频率成分都被PGC解调过程所利用 ,并由此确定了时分复用系统中采样频率应满足的最低条件 ,从而为提高阵列复用路数提供了理论依据 ,并通过实验验证了有关结论 .

A threshold sampling frequency was established by analyzing the spectrum of an output signal from an optical-fiber sensor and the theory behind the phrase generated carrier, and determining that not all spectra of output signal of optical-fiber sensor are used in the process of PGC,and therefore,a theoretical basis was provided for increasing the multiplex number.