Low loss hollow-core optical fibers conjoining tube lattice and revolver structures

Recently, hollow-core fibers having negative curvature of the core-cladding boundary become promising for their inexplicit guiding mechanism and ultra-low loss characteristics. Here, we report a modified fiber design, which accumulates the supremacy of tube lattice and negative curvature structures to attain lower confinement loss (CL) for multi bandwidth applications. Extensive numerical simulations are performed, and a noteworthy CL of 4.47 x 10-05 dB/m for LP01 mode at 0.85 mu m wavelength and three conspicuous low-loss transmission bandwidth between 0.6 mu m and 2.5 mu m are found. The CL of the proposed fiber can also be tailored with important parameters like antiresonance order, core diameter, and ring thickness.