Polarization Maintaining Beam Combiner(PBC) and Polarization Maintaining Beam Splitter(PBS) is based on crystal technology and epoxy-free in the optical path. With high extinction ratio,high power handling and low insertion loss, PBC is designed to work as pump combiners for Raman amplifier systems, etc. To the opposite, PBS has the feature to split one signal to two polarized signals with high optical power Handling.