In this paper, we present numerical studies of several different structures of anti-resonant, hollow core optical fibers. The cladding of these fibers is based on the Kagomé lattice concept, with some of the core-surrounding lattice cells removed. This modification, by creating additional, glass-free
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In this paper, we present numerical studies of several different structures of anti-resonant, hollow core optical fibers. The cladding of these fibers is based on the Kagomé lattice concept, with some of the core-surrounding lattice cells removed. This modification, by creating additional, glass-free regions around the core, results in a significant improvement of some important optical fiber parameters, such as confinement loss (
CL), bending loss (
BL), and dispersion parameter (
D). According to the conducted simulations (with fused silica glass being the structure’s material),
CL were reduced from ~0.36 dB/m to ~0.16 dB/m (at 760 nm wavelength) in case of the structure with removed cells, and did not exceed the value of 1 dB/m across the 700–850 nm wavelength range. Additionally, proposed structure exhibits a remarkably low value of
D—from 1.5 to 2.5 ps/(nm × km) at the 700–800 nm wavelength range, while the
BL were estimated to be below 0.25 dB/m for bending radius of ~1.5 cm.
CL and
D were simulated, additionally, for structures made of acrylic glass polymethylmethacrylate, (PMMA), with similarly good results—
DPMMA ∊ [2, 4] ps/(nm × km) and
CLPMMA ≈ 0.13 dB/m (down from 0.41 dB/m), for the same spectral regions (700–800 nm bandwidth for
D, and 760 nm wavelength for
CL).
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