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We propose a unique design of negative curvature optical fibers utilizing rotational elliptical cladding structures. The silica-based fibers were numerically characterized using a finite element method-based electromagnetic solver. Different topologies consisting of rotational cladding elements with different tube thicknesses and core diameters were studied. The investigation focused on confinement losses, birefringence, and higher-order mode extinction based on varying tube sizes and rotational angles. Results showed up to 20% improvement in confinement losses for rotated structures, with minimum losses of 4.47*10-4 dB/m at 1.5 μm wavelength. The designed fibers possess polarization-dependent characteristics, and higher-order mode extinction analysis showed dominant single-mode transmission.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Santiago Armas andAhmet E. Akosman
"Designing optical negative curvature hollow-core fibers with rotated elliptical cladding elements", Proc. SPIE 12682, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII, 126820T (5 October 2023); https://doi.org/10.1117/12.2677628
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Santiago Armas, Ahmet E. Akosman, "Designing optical negative curvature hollow-core fibers with rotated elliptical cladding elements," Proc. SPIE 12682, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVII, 126820T (5 October 2023); https://doi.org/10.1117/12.2677628