Study on Characteristics of Coupled-Core Four-Core Fibers With Different Core Pitches

Junjie Xiong; Lin Ma; Yanming Chang; Tianqi Cheng; Lei Shen; Lei Zhang; Changkun Yan; Lin Sun; Qingwen Liu; Zuyuan He

doi:10.1109/JPHOT.2023.3341415

IEEE Photonics Journal (Jan 2024)

Study on Characteristics of Coupled-Core Four-Core Fibers With Different Core Pitches

Junjie Xiong,
Lin Ma,
Yanming Chang,
Tianqi Cheng,
Lei Shen,
Lei Zhang,
Changkun Yan,
Lin Sun,
Qingwen Liu,
Zuyuan He

Affiliations

Junjie Xiong: ORCiD; State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, China
Lin Ma: ORCiD; State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, China
Yanming Chang: ORCiD; State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, China
Tianqi Cheng: State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, China
Lei Shen: State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fiber and Cable Joint Stock Limited Company, Wuhan, China
Lei Zhang: State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fiber and Cable Joint Stock Limited Company, Wuhan, China
Changkun Yan: State Key Laboratory of Optical Fiber and Cable Manufacture Technology, Yangtze Optical Fiber and Cable Joint Stock Limited Company, Wuhan, China
Lin Sun: ORCiD; Suzhou Key Laboratory of Advanced Optical Communication Network Technology, School of Electronic and Information Engineering, Soochow University, Suzhou, China
Qingwen Liu: ORCiD; State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, China
Zuyuan He: ORCiD; State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, China

DOI: https://doi.org/10.1109/JPHOT.2023.3341415
Journal volume & issue: Vol. 16, no. 1
pp. 1 – 7

Abstract

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We studied the characteristics of coupled-core four-core fibers (CC-4CFs) with different core pitches both theoretically and experimentally. The spatial mode dispersions of different fibers were analyzed, and the result agrees well with theoretical ones. In the experiment, we achieved a spatial mode dispersion as low as 3.72 ps/km1/2 for a 4 km-long CC-4CF with core pitch of 19 μm at a bending radius of 8 cm. The impulse response matrices of four core fibers with different core pitches was investigated using swept-wavelength interferometry over 100 nm bandwidth. The impulse responses were Gaussian-shaped and consistent between different inputs and outputs for CC-4CFs. Our results show that the CC-4CFs with core pitches of 17 and 19 μm exhibit narrower pulse broadening. In addition, the mode-dependent losses of different fibers were analyzed. For the fibers with core pitch of 19 μm, the estimated mode-dependent loss was lower than 3 dB for the entire 100 nm bandwidth. Our results are especially helpful for developing coupled-core multicore fibers for long-haul transmission applications.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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