Polarization-Dependent Phase-Shifted Fiber Bragg Gratings Inscribed by Femtosecond Laser Overexposure

摘要

Polarization dependent phase-shifted fiber Bragg gratings (PS-FBGs) were fabricated with 800 nm femtosecond laser overexposure and a uniform phase mask. Negative index change created in the center was responsible for the PS-FBG formation.