@inproceedings{5bc5e102b22243ea9554bb5589d18964,
title = "Ultralow loss hollow-core nested-tube negative curvature fiber",
abstract = "Hollow-core fiber (HCF) has attracted great interest from researchers because of its high damage threshold and small nonlinearity compared with solid-core fiber. However, how to reduce the loss of HCF has always been an urgent problem to be solved. Aiming to solve the problem, we propose a novel hollow-core negative curvature fiber (HC-NCF) with an elliptical nested tube and a circular nested tube. The structure of this HC-NCF is relatively simple, which greatly reduces the difficulty of fabrication. Finite element modeling has been used to simulate and calculate the confinement loss (CL) and bending loss (BL) of the fiber with different nested tube structures. Results show that the CL of the LP01 mode is as low as 6.48×10-6 dB/km at the interesting wavelength of 1.06 μm. It exhibits a minimum CL of 5.28×10-6 dB/km at 1.01 μm with maintaining a loss of less than 0.003 dB/km over 1020 nm (0.77 μm to 1.79 μm) bandwidth. In addition, we proposed the HC-NCF has been confirmed to have better-bending resistance. Within a bending radius of 5-40 cm, the HC-NCF has a BL below 3.75×10-4 dB/km at a 10 cm bending radius; the BL is below 1.03×10-5 dB/km at a 40 cm bending radius.",
keywords = "fiber properties, hollow core fiber, microstructured fibers, negative curvature fiber",
author = "Jiali Zhang and Chenyu Xu and Boyi Yang and Jie Cao and Liquan Dong and Yang Cheng and Xuesheng Liu and Qun Hao",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE.; 2022 Advanced Fiber Laser Conference, AFL 2022 ; Conference date: 11-11-2022 Through 13-11-2022",
year = "2023",
doi = "10.1117/12.2668660",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Pu Zhou",
booktitle = "Advanced Fiber Laser Conference, AFL 2022",
address = "United States",
}