Design of a polarization splitter for an ultra-broadband dual-core photonic crystal fiber

doi:10.1088/1674-1056/ac3a63

Abstract A novel ultra-broadband polarization splitter based on a dual-core photonic crystal fiber (DC-PCF) is designed. The full-vector finite element method and coupled-mode theory are employed to investigate the characteristics of the polarization splitter. According to the numerical results, a graphene-filled layer not only broadens the working bandwidth but also reduces the size of the polarization splitter. Furthermore, the fluorine-doped region and the germanium-doped region can broaden the bandwidth. Also, the 4.78 mm long polarization splitter can achieve an extinction ratio of -98.6 dB at a wavelength of 1550 nm. When extinction ratio is less than -20 dB, the range of the wavelength is 1027 nm-1723 nm with a bandwidth of 696 nm. Overall, the polarization splitter can be applied to all-optical network communication systems in the infrared and near-infrared wavelength range.

Keywords: photonic crystal fiber polarization splitter broadband bandwidth extinction ratio

Received: 28 July 2021
Revised: 27 October 2021
Accepted manuscript online:

PACS:	42.81.Qb	(Fiber waveguides, couplers, and arrays)
	42.79.Fm	(Reflectors, beam splitters, and deflectors)
	42.68.Mj	(Scattering, polarization)

Fund: Project supported by the State Key Laboratory of Luminescence and Applications (Grant No.SKLA-2020-01).

Corresponding Authors: Hui Zou,E-mail:zouhui1010@163.com
E-mail: zouhui1010@163.com

About author: 2021-11-17

Cite this article:

Yongtao Li(李永涛), Jiesong Deng(邓洁松), Zhen Yang(阳圳), Hui Zou(邹辉), and Yuzhou Ma(马玉周) Design of a polarization splitter for an ultra-broadband dual-core photonic crystal fiber 2022 Chin. Phys. B 31 054215

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Design of a polarization splitter for an ultra-broadband dual-core photonic crystal fiber

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