A Polarization Beam Splitter Based on Dual Hollow-Core Anti-Resonant Fiber with High Extinction Ratio and Large Bandwidth

A polarization beam splitter based on a dual hollow-core anti-resonance fiber structure is proposed. The optimal propagation length of the polarization beam splitter is 2.36 cm, and the bandwidth is 550 nm (1330–1880 nm). It can achieve a maximum extinction ratio of 86 dB. Furthermore, it has good single-mode transmission characteristics. The polarization beam splitter has a good beam splitting effect in the whole communication band. It will have significant applications in the optical communication and sensing systems.