Supercontinuum generation with extended bandwidth and improved purity in graded-index ring-core fiber
Year: 2024
Type: article
Abstract: In this paper, we numerically investigate the impact of shape factor ( k ) on the mode properties of graded-index ring-core fiber (GIRCF). A 50 mol% Ge-doped GIRCF with shape factor of 2 is devised to generate supercontinuum (SC) carrying orbital angular momentum (OAM) modes, which possesses flat dispersion with a minor variation of < ± 30 ps/nm/km from 1090 to 2590 nm. The generated supercontinuum (SC) in the designed GIRCF carrying OAM 1,1 mode covers 2305-nm wavelength range from 750 to 3055 nm at − 40 dB level. The graded refractive index profile (RIP), introduced as a new parameter, offers an additional dimension for the design of ring-core fiber (RCF) supporting OAM modes. The graded RIP contributes to the creation of flat and near-zero dispersion in the RCF structures and reduces the spin–orbit coupling (SOC) effect at the material boundary, leading to broader spectral coverage and higher mode purity in the output spectra.
Source: Scientific Reports
Authors: Qinru Peng, Jian Yang, Yiwen Zhang, Yuanpeng Liu, Yuxi Fang, Wenpu Geng, Zhongqi Pan, Fei Yang, Yang Yue
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,590
Award: G4360137079
OpenAlex ID: W4405029400