School of Advanced Technology, Algonquin College, Ottawa, Ontario, Canada.
Opt Lett. 2013 May 1;38(9):1536-8. doi: 10.1364/OL.38.001536.
We present a left-right symmetry restoring method, which removes the detrimental birefringence in the single-mode fiber Sagnac interferometer, achieved with the aid of a half waveplate oriented at a specific angle. We show theoretically and demonstrate experimentally that adding a π-shift between clockwise and counterclockwise propagating, horizontally (in fiber loop plane) polarized field components, the Sagnac loop mirror's reflection becomes independent on birefringence of an element placed in the loop.
我们提出了一种左右对称恢复方法，该方法利用特定角度定向的半波片消除了单模光纤萨格纳克干涉仪中的有害双折射。我们从理论上和实验上证明，在顺时针和逆时针传播的水平（光纤环平面）偏振场分量之间增加π位移，可以使萨格纳克环路镜的反射不受环路中放置的元件双折射的影响。
