Abstract

We propose a novel nodeless conjoined-tube hollow-core fiber (CT-HCF) with elliptical arcs as negative curvature boundaries to limit the leakage of transmitted light. The cladding nodes are effectively eliminated by the attachment of arcs to the outermost dielectric tube. Numerical simulations performed using the full-vector finite element method show that a significant reduction in fiber loss over a wide bandwidth can be obtained. The confinement losses for the proposed fiber are two orders of magnitude lower than those obtained for a typical CT-HCF. The total loss, including confinement loss and surface scattering loss, is also investigated. The proposed fiber shows a loss of less than 0.1 dB/km for a bandwidth of 450 nm, with a minimum loss of 6.58·10⁻⁵ dB/m at 1.45 μm. Moreover, the proposed fiber exhibits good single-mode performance, with the higher-order mode extinction ratio reaching a maximum value of 39341 at 1.7 μm.

Low-loss single-mode modified conjoined tube hollow-core fiber

Kumary Sumi Rani Shaha and Abdul Khaleque
Appl. Opt. 60(21) 6243-6250 (2021)

Novel hollow-core asymmetric conjoined-tube anti-resonant fiber for low-loss THz wave guidance

Md. Aslam Mollah, Md. Samiul Habib, and Md. Selim Habib
OSA Continuum 3(5) 1169-1176 (2020)

Low bending loss few-mode hollow-core anti-resonant fiber with glass-sheet conjoined nested tubes

Huabei Liu, Yu Wang, Yan Zhou, Zuguang Guan, Zhangwei Yu, Qiang Ling, Si Luo, Jie Shao, Dongmei Huang, and Daru Chen
Opt. Express 30(12) 21833-21842 (2022)

Wideband low confinement loss anti-resonant hollow core fiber with nested U-shape tube

Weiqin Zheng, Yuwen Qin, Ou Xu, Meng Xiang, Di Peng, Songnian Fu, and Jianping Li
Opt. Express 29(15) 24182-24192 (2021)

Low-loss hollow-core silica fibers with adjacent nested anti-resonant tubes

Md. Selim Habib, Ole Bang, and Morten Bache
Opt. Express 23(13) 17394-17406 (2015)