Design, fabrication, and characterization of a low-index center and trench-assisted 7-ring-core 5-mode-group fiber for dense space-division multiplexing

Zhuo Wang; Quanchao Lu; Jiajing Tu; Qinghua Xiao; Lei Shen; Xiaobo Lan; Zhaohui Li; Changyuan Yu; Chao Lu

doi:10.1364/OE.447823

Design, fabrication, and characterization of a low-index center and trench-assisted 7-ring-core 5-mode-group fiber for dense space-division multiplexing

Zhuo Wang, Quanchao Lu, Jiajing Tu, Qinghua Xiao, Lei Shen, Xiaobo Lan, Zhaohui Li, Changyuan Yu, Chao Lu

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

11 Citations (Scopus)

Abstract

An optimized design of 7-ring-core 5-mode-group fiber for mode-group-based dense space-division multiplexing (DSDM) is proposed. It is found that decreasing the refractive index of the center and trench of each ring core can increase the available ring-core thickness and meanwhile suppress the radial higher-order modes. Based on the simulation, a fiber, with a thicker ring core and a relatively low refractive index contrast at the ring-core boundaries, is found of higher mode purity and lower macro-bending-caused mode coupling. In the experiment, the seven cores of the fabricated fiber have low transmission losses around −0.25 dB/km with only a few fluctuations. The three higher-order mode groups (MG_2,1, MG_3,1, and MG_4,1) are verified to be in a weak-coupling state (crosstalk of which are less than −12 dB) over a transmission length of 23 km.

Original language	English
Pages (from-to)	650-663
Number of pages	14
Journal	Optics Express
Volume	30
Issue number	1
DOIs	https://doi.org/10.1364/OE.447823
Publication status	Published - 3 Jan 2022

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.447823

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title = "Design, fabrication, and characterization of a low-index center and trench-assisted 7-ring-core 5-mode-group fiber for dense space-division multiplexing",

abstract = "An optimized design of 7-ring-core 5-mode-group fiber for mode-group-based dense space-division multiplexing (DSDM) is proposed. It is found that decreasing the refractive index of the center and trench of each ring core can increase the available ring-core thickness and meanwhile suppress the radial higher-order modes. Based on the simulation, a fiber, with a thicker ring core and a relatively low refractive index contrast at the ring-core boundaries, is found of higher mode purity and lower macro-bending-caused mode coupling. In the experiment, the seven cores of the fabricated fiber have low transmission losses around −0.25 dB/km with only a few fluctuations. The three higher-order mode groups (MG2,1, MG3,1, and MG4,1) are verified to be in a weak-coupling state (crosstalk of which are less than −12 dB) over a transmission length of 23 km.",

author = "Zhuo Wang and Quanchao Lu and Jiajing Tu and Qinghua Xiao and Lei Shen and Xiaobo Lan and Zhaohui Li and Changyuan Yu and Chao Lu",

note = "Funding Information: Funding. National Key Research and Development Program of China (2019YFA0706300); National Natural Science Foundation of China (U1701661, U2001601); Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X121); Guangzhou Basic and Applied Basic Research Foundation (202002030327); Key-Area Research and Development Program of Guangdong Province (2020B0101080002). Publisher Copyright: {\textcopyright} 2021 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement",

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doi = "10.1364/OE.447823",

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T1 - Design, fabrication, and characterization of a low-index center and trench-assisted 7-ring-core 5-mode-group fiber for dense space-division multiplexing

AU - Wang, Zhuo

AU - Lu, Quanchao

AU - Tu, Jiajing

AU - Xiao, Qinghua

AU - Shen, Lei

AU - Lan, Xiaobo

AU - Li, Zhaohui

AU - Yu, Changyuan

AU - Lu, Chao

N1 - Funding Information: Funding. National Key Research and Development Program of China (2019YFA0706300); National Natural Science Foundation of China (U1701661, U2001601); Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program (2017BT01X121); Guangzhou Basic and Applied Basic Research Foundation (202002030327); Key-Area Research and Development Program of Guangdong Province (2020B0101080002). Publisher Copyright: © 2021 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

PY - 2022/1/3

Y1 - 2022/1/3

N2 - An optimized design of 7-ring-core 5-mode-group fiber for mode-group-based dense space-division multiplexing (DSDM) is proposed. It is found that decreasing the refractive index of the center and trench of each ring core can increase the available ring-core thickness and meanwhile suppress the radial higher-order modes. Based on the simulation, a fiber, with a thicker ring core and a relatively low refractive index contrast at the ring-core boundaries, is found of higher mode purity and lower macro-bending-caused mode coupling. In the experiment, the seven cores of the fabricated fiber have low transmission losses around −0.25 dB/km with only a few fluctuations. The three higher-order mode groups (MG2,1, MG3,1, and MG4,1) are verified to be in a weak-coupling state (crosstalk of which are less than −12 dB) over a transmission length of 23 km.

AB - An optimized design of 7-ring-core 5-mode-group fiber for mode-group-based dense space-division multiplexing (DSDM) is proposed. It is found that decreasing the refractive index of the center and trench of each ring core can increase the available ring-core thickness and meanwhile suppress the radial higher-order modes. Based on the simulation, a fiber, with a thicker ring core and a relatively low refractive index contrast at the ring-core boundaries, is found of higher mode purity and lower macro-bending-caused mode coupling. In the experiment, the seven cores of the fabricated fiber have low transmission losses around −0.25 dB/km with only a few fluctuations. The three higher-order mode groups (MG2,1, MG3,1, and MG4,1) are verified to be in a weak-coupling state (crosstalk of which are less than −12 dB) over a transmission length of 23 km.

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Design, fabrication, and characterization of a low-index center and trench-assisted 7-ring-core 5-mode-group fiber for dense space-division multiplexing

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