Parabolic-Index Ring-Core Fiber Supporting High-Purity Orbital Angular Momentum Modes

We design a graded-index ring-core fiber with a GeO(2)-doped silica ring core and SiO(2) cladding. This fiber structure can inhibit the effect of spin-orbit coupling to mitigate the power transfer among different modes and eventually enhance the orbital angular momentum (OAM) mode purity. By changin...

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Detalles Bibliográficos
Autores principales: Liu, Yuanpeng, Wang, Yingning, Geng, Wenpu, Zhao, Wenqian, Zhang, Hao, Zhang, Weigang, Pan, Zhongqi, Yue, Yang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10098886/
https://www.ncbi.nlm.nih.gov/pubmed/37050703
http://dx.doi.org/10.3390/s23073641
Descripción
Sumario:We design a graded-index ring-core fiber with a GeO(2)-doped silica ring core and SiO(2) cladding. This fiber structure can inhibit the effect of spin-orbit coupling to mitigate the power transfer among different modes and eventually enhance the orbital angular momentum (OAM) mode purity. By changing the high-index ring core from the step-index to parabolic graded-index profile, the purity of the OAM(1,1) mode can be improved from 86.48% to 94.43%, up by 7.95%. The proposed fiber features a flexible structure, which can meet different requirements for mode order, effective mode area, etc. Simulation results illustrate that the parabolic-index ring-core fiber is promising in enhancing the OAM mode purity, which could potentially reduce the channel crosstalk in mode-division-multiplexed optical communication systems.

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