Dual hollow-core negative curvature fiber polarization beam splitter covering the O + E + S + C + L communication band

Yueting Ni, Jinhui Yuan*, Shi Qiu, Guiyao Zhou*, Changming Xia, Xian Zhou, Binbin Yan, Qiang Wu, Kuiru Wang, Xinzhu Sang, Chongxiu Yu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, a dual hollow-core negative curvature fiber is proposed for the polarization beam splitter. The effects of the structure parameters of the dual hollow-core negative curvature fiber on the coupling length and coupling length ratio of the x -polarized and y -polarized core modes and the higher-order mode extinction ratio are analyzed by the finite element method. Moreover, the normalized output powers of the x -polarized and y -polarized modes in the cores A and B and the corresponding extinction ratio are also investigated by the mode coupling theory. The simulation results show that a dual hollow-core negative curvature fiber polarization beam splitter with the length of 6.45 cm can achieve a broad bandwidth of 400 nm (1.23–1.63 µm), covering the O + E + S + C + L communication band. In addition, the higher-order mode extinction ratio is greater than 100 in the considered wavelength range, which means that it has good single-mode characteristics. It is believed that the proposed dual hollow-core negative curvature fiber polarization beam splitter will have significant applications in the optical communication system.
Original languageEnglish
Pages (from-to)2493-2501
Number of pages9
JournalJournal of the Optical Society of America B
Volume39
Issue number9
Early online date23 Aug 2022
DOIs
Publication statusPublished - 1 Sep 2022

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