High birefringent microstructured polymer optical fiber with frozen stresses

Abstract

We report on fabrication of a new type high birefringent microstructured polymer fiber with a PMMA stress applied element in the core. An inner part of preform consists regular three rings of holes, made by drilling method. Inside the microstructure we drilled an additional hole, where a special type – strongly stressed PMMA rod was placed. The manufactured preform was measured in an polarimetric microscope configuration where we observed very large internal stresses - especially seen in a core area.