干涉型光纤传感器及阵列的分集检测消偏振衰落技术的研究

对干涉型光纤传感器的分集检测消偏振衰落技术进行了新的理论分析，提出了将各种信号平方后相加的信号处理方式，使之能实现单元及阵列的实时消偏振衰落信号检测。计算了这一信号处理方式可能引起的幅度最大波动，并得出三路检测偏是分集检测的一个合适取值的结论。根据理论分析，在马赫－陈德尔干涉仪上进行实验研究取得了较好结果，并设计了用于阵列的分集检测实现方式。

Development of an Interferometric Fiber-Optic Sensor and Its Array′s Divide/Combine Polarization-Induced-Fading Eliminated Technique

A new theoretical analysis is given to the divide／combine polarization—induced—fading eliminated technique of an interfcrometrie fiber—optic sensor and its array,and a new way is proposed to realize the real tline detection of the divide~combine method by squaring each signal and adding them togeter. The maximum amplitude fluctuation of this method is calculated. and the conclusion is drawn that three is the best number of the analysers. According to the analysers, the sarisfactory experimental result is achieved on the Mach—Zehnder interferometer, and the application of the method in the interferometric array is designed.