A systematic study of linear and nonlinear properties of photonic crystal fibers

作者：Saghaei Hamed^*; Heidari Vahid; Ebnali Heidari Majid; Yazdani Mohammad Rouhollah

来源：Optik, 2016, 127(24): 11938-11947.

DOI：10.1016/j.ijleo.2016.09.111

• Nonlinear optics
• Photonic crystal fibers
• Nonlinear optical materials
• Dispersion
• Supercontinuum generation
• Triangular and square lattices

In this paper, linear and nonlinear properties of photonic crystal fiber (PCF) are studied in terms of wavelength for triangular and square lattices to investigate the effects of changing the fiber dimensions including air-hole diameter, pitch size and the number of air-hole rings on the dispersion profile and its nonlinear parameter. A chalcogenide based PCF is proposed in this paper and modeled in TCAD environment of Mode Solution software related to Lumerical package. The finite difference eigenmode solver numerical method is utilized in the modeling and anisotropic perfectly matched layers (PML) are assumed as absorbing boundaries to be positioned outside the outer-most ring of the air-holes. Accordingly, the effects of changing each of aforementioned parameters on the value and slope of dispersion and loss profiles as well as on its nonlinear parameter are systematically determined. For instance, numerical results achieved by the simulation results show that both the value and slope of dispersion profile are reduced by considering the diameter of air holes with a constant value and increasing the pitch size of the fiber. Moreover, considering a fixed value for the pitch size and increasing the air hole diameters lead to an increase of dispersion profile in terms of wavelength. Additionally, the numerical results show that an increase in the diameter of the air holes results in an increase in the nonlinear parameter. Further, the input source's wavelength increase will result in the reduction of the nonlinear parameter.

• 出版日期2016