中国物理B ›› 2022, Vol. 31 ›› Issue (5): 54215-054215.doi: 10.1088/1674-1056/ac3a63
Yongtao Li(李永涛), Jiesong Deng(邓洁松), Zhen Yang(阳圳), Hui Zou(邹辉), and Yuzhou Ma(马玉周)
Yongtao Li(李永涛)1, Jiesong Deng(邓洁松)2, Zhen Yang(阳圳)2, Hui Zou(邹辉)†2,3,†, and Yuzhou Ma(马玉周)4
摘要: 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.
中图分类号: (Fiber waveguides, couplers, and arrays)