Apparatus and methods for the determination of a birefringence axis of a polarization-maintaining optical fiber

摘要

In some embodiments, a non-transitory processor-readable medium storing code includes code to cause a processor to receive an image signal associated with an image of an end face of a polarization-maintaining optical fiber (PM fiber), determine a center position of the PM fiber, perform a local image equalization on the end face, and define an edge map of the end face. The code can perform a Hough space analysis on the edge map to determine the center position of a first structure and/or a second structure on the end face. The first structure and the second structure can each define at least in part a birefringence of the PM fiber. A birefringence axis of the PM fiber can be calculated based on at least two of the center position of the PM fiber, the center position of the first structure and the center position of the second structure.