A polarization-maintaining (PM) solid-core anti-resonant fiber (SC-ARF) based on the anti-resonant waveguide mechanism was proposed in this work. Numerical simulation results indicated that fundamental mode (FM) birefringence could be obtained by filling the core and cladding of designed SC-ARF with As2S3 and As2Se3 materials respectively. With the cladding tubes thickness of 0.82 μm, our fiber presented the birefringence coefficient (Δn) about 1.56x10-5 and the confined loss (CL) less than 0.1dB/m. What’s more, the optimized CL values and band-pass transmission properties were observed by increasing the tubes number and adjusting the incident laser wavelength, which are of pivotal importance in the PM laser systems and show great potential to fabricate the filters in the mid-infrared regime (MIR).
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