1. Mid-infrared high birefringence As2Se3-based PCF with large nonlinearity and distinctive dispersion by using asymmetric elliptical air hole cladding.
- Author
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Hui, Zhanqiang, Yang, Min, Zhang, Youkun, and Zhang, Meizhi
- Subjects
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BIREFRINGENCE , *ARSENIC compounds , *NONLINEAR systems , *ASYMMETRY (Chemistry) , *PERFECTLY matched layers (Mathematical physics) , *PHOTONIC crystal fibers , *OPTICAL fiber cladding - Abstract
A novel high birefringence As2Se3-based hexagonal lattice photonic crystal fiber (PCF) is proposed. In the structure, a central defect core and three kinds of elliptical air holes with different major axes length and ellipticity are introduced in the cladding. The finite difference time domain (FDTD) method with perfectly matched layer (PML) absorption boundary conditions are used to simulate the guided modes of the designed PCF. The properties of this PCF are investigated in detail including the birefringence, beat length, dispersion, nonlinearity and polarization mode dispersion in the 2-5 mid-infrared range. The results show that for the optimized structure parameters of , , , , , , , the high birefringence of 0.1192 and beat length of 41.93 are obtained. The maximum nonlinearity coefficient of 10,050 wkm and 15,200 wkm for x- and y-polarization modes are achieved. The distinctive dispersion is analyzed, which is all-normal in x-polarization direction while it has two zero dispersion points at 3.18 and 3.65 in y-polarization direction. The designed PCF with high birefringence, large nonlinearity and distinctive dispersion will be beneficial for mid-infrared fiber sensing, mid-infrared spectroscopy and nonlinear optics applications. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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