Highly birefringent anti-resonant hollow-core fiber with meniscoid nested structure

• DOI: 10.1364/oe.528463
• Publication Date: 2024-06-14T16:00:25Z
• Authors: Yang Wang; Xiaobei Zhang; Wei Chen; Qi Zhang; Yong Yang; Maochun Li; Miao Yan; Tingyun Wang
• Keywords: 0103 physical sciences; 01 natural sciences

We propose a meniscoid nested anti-resonant hollow-core fiber (MAF), wherein the fourfold rotational symmetry structure enables high birefringence and low loss in dual-wavelength range. Numerical investigation simulation for variations wall thickness along orthogonal directions are conducted, through which formulated optimization criterion revealing relationship between minimum difference of 10 −5 is obtained. A parameter beat length to ratio η defined evaluate MAF performance with respect confinement (CL). With optimized structure, CL improved 3.62 × 8.5 dB/km at 1.06 µm, 9.83 204.1 1.55 respectively. Meanwhile, bandwidths extend 172 nm µm 216 superior bending resistance characteristics validated. Our work offers valuable guidance designing optimizing highly birefringent (ARF), proposed has great potential polarization-dependent transmission interferometric gyroscopes.