Behavior of intercore crosstalk in square-layout uncoupled four-core fibers

IEICE Electronics Express

article

Masanori Koshiba¹  Yasuo Kokubun²  Mayu Nakagawa³  Masaki Ohzeki³  Katsuhiro Takenaga³ 

[1] Hokkaido University;Institute of Technologists;Optical Technologies R&D Center, Fujikura Ltd.

关键词: four-core fiber;    intercore crosstalk;    coupled-power theory;   

DOI  :  10.1587/elex.19.20220379

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

Recently, a very interesting behavior of crosstalk (XT) between diagonal cores (diagonal XT) in a square-layout uncoupled four-core fiber (UC-4CF) that grows quadratically with fiber length has been reported. In this paper, the behavior of intercore XT in square-layout UC-4CFs is investigated on the basis of a coupled-power theory. To make it easy to understand the physical mechanism of intercore XT behavior, we derive an approximate solution of coupled-power equations. We show that there exists a range of fiber lengths within which the diagonal XT grows quadratically. Finally, we propose a heterogeneous square-layout UC-4CF in which intercore XT could be further suppressed.

【 授权许可】

CC BY