Dependences of the polarization properties of polymer graded-index fibers of the Selfoc type

Temperature dependences of some polarization characteristics were determined for polymer Selfoc-type fibers. It was found that when plane-polarized light passed through a fiber of this kind, it emerged with elliptic polarization. The effective direction of the polarization of light emerging from a fiber was shifted by an angle Δφ from the plane of polarization of the incident wave. The temperature dependence of Δφ was studied. It was found that the investigated graded-index fibers were optically biaxial.