Glue induced birefringence in surface mounted optical fibres

The birefringence introduced in the surface mounting of optical fibres using two different types of glue was measured by a polarimetric setup. A thin layer of cyanoacrylate glue led to a birefringence of 3.6×10^-5, with axes normal and parallel to the surface. A thicker layer of epoxy introduced no measurable birefringence