Olson G A, Metcalf J L
Appl Opt. 1992 Mar 20;31(9):1234-8. doi: 10.1364/AO.31.001234.
When high-birefringent fibers are used in polarization-sensitive devices, one must ensure the proper alignment of the optical axes. One nondestructive alignment method involves squeezing the fiber and noting the change in the resultant birefringent axes. We use the finite-element method to determine the change in the principal stress direction, and, hence, the extrinsic birefringent axis orientation, as a function of the fiber coating eccentricity. Fiber eccentricity can shift the extrinsic birefringent axis by more than 1.5 degrees , whch becomes important in high-performance device applications.
当在偏振敏感器件中使用高双折射光纤时，必须确保光轴的正确对准。一种无损对准方法是挤压光纤并记录所得双折射轴的变化。我们使用有限元方法来确定主应力方向的变化，从而确定作为光纤涂层偏心度函数的外在双折射轴取向。光纤偏心度可使外在双折射轴偏移超过1.5度，这在高性能器件应用中变得很重要。
