Experimental Investigation on Polarization Rotation in Twisted Optical Fiber Using Laboratory Coordinate System

摘要

Recently, a formulation of the polarization rotation in twisted optical fibers was derived using a coupled-mode approach that, other than existing theories, employs a fixed reference frame. This is interesting for fiber sensing applications, where perturbations, such as strains, are conventionally given in a fixed laboratory reference frame. Hence, the derived theory can easily be integrated into existing formulations in the laboratory reference frame. This work demonstrates the experimental verification of the derived theory. An optical fiber is mechanically twisted using an automated test stand, and the change in polarization is recorded. The results are consistent with the theory.