Mode converter using bent and twisted coupled-multicore fibers for group delay spread reduction

Sato, Takanori; Homma, Kazushi; Fujisawa, Takeshi; Sagae, Yuto; Sakamoto, Taiji; Matsui, Takashi; Nakajima, Kazuhide; Saitoh, Kunimasa

Mode converter using bent and twisted coupled-multicore fibers for group delay spread reduction

Sato, Takanori; Homma, Kazushi; Fujisawa, Takeshi et al.

Optical fiber technology, 2023, 77, 103286

Permalink : https://hdl.handle.net/2115/94203

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アクセス権	open access
URI	https://hdl.handle.net/2115/94203
タイトル	Mode converter using bent and twisted coupled-multicore fibers for group delay spread reduction
著者	Sato, Takanori ; Homma, Kazushi ; Fujisawa, Takeshi ; Sagae, Yuto ; Sakamoto, Taiji ; Matsui, Takashi ; Nakajima, Kazuhide ; Saitoh, Kunimasa
著者名 Sato, Takanori
著者名 Homma, Kazushi
著者名 Fujisawa, Takeshi
著者名 Sagae, Yuto
e-Rad_Researcher 10235179 著者名 Sakamoto, Taiji
e-Rad_Researcher 30463582 著者名 Matsui, Takashi
著者名 Nakajima, Kazuhide
e-Rad_Researcher 20333627 著者名 Saitoh, Kunimasa
言語	英語
キーワード	Coupled multicore fiber
	Group delay spread
	Space division multiplexing
	Coupled-mode theory
発行日	2023-05
出版者	Elsevier
収録物名	Optical fiber technology
巻(号)	77
ページ	103286
抄録	A mode converter using bent and twisted coupled-multicore fiber for the reduction of the group delay spread is proposed. The bent and twisted fiber, which is one of the periodic structures, can work as a long-period grating mode converter by properly setting the twist rate. To investigate the mode conversion characteristics, a simple and effective eigenmode analysis for three-dimensional periodic structures is proposed. We found that to convert the specified modes, the core layout is also important as well as the twist rate. For example, the mode conversion behaviors of 4CFs with square lattice and triangular lattice layouts are greatly different although each 4CF enables the specified mode conversion. It is revealed that, by switching the higher and lower order modes, the group delay can be equalized, resulting in the suppression of the group delay spread. It leads to reducing the complexity of the multiple-input multiple-output receiver in the mode division multiplexing system.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© <2023>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	1068-5200
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.yofte.2023.103286