干涉式光纤电流互感器的研究

设计了一种结构简单的反射式干涉电流互感器，给出了数学模型，并用实验验证了该系统的可行性。与其它光纤电流互感器相比，该互感器采用了在光出射端将一段保偏光纤扭转，使光的偏振状态得到了改变，避免了由于光纤弯曲而产生的双折射；另外，由于二束光在同一根光纤中传输，光纤伸缩等效应对互感器无影响，因此可以排除周围环境对互感器产生的干扰，提高了互感器的信噪比。

Research on Interferometric Optic Fiber Current Transformer

A simple struture reflect-polarization interferometric optic fiber current transformer was designed, the model is given and the feasibility is tested. Compared with other current transformer, this transformer uses that a section of polarization-maintain fiber is twisted, thus its polarization state can be changed, avoiding to produce birefrigent because of fiber bended. On the side , two bind lights transfers in a same fiber, the fiber flex domino effect has not infection to transformer,so the extra disturb around entironment bringing is debared , the signal-to-noise ratio of transformer is increased.