Propagation characteristics of single-polarization optical fibers with the cross section of arbitrary shape

In this paper, propagation characteristics of a single polarization optical fiber with the cross section of arbitrary shape are numerically studied by applying the circular Fourier expansion method. Firstly, for a single elliptical core fiber, an accuracy of the circular Fourier expansion method is discussed by comparing to a rigorous analysis method using Mathieu functions. Secondly, as an application of the circular Fourier expansion method, a single polarization optical fiber composed of an elliptic core with round shoulder and fluctuations in the pit of circular periphery is designed so as to satisfy the zero total dispersion at wavelength 1.55μm and is discussed for the single polarization bandwidth and the wavelength sensitivity of the total dispersion. These results are compared with the case of the single polarization optical fiber without round shoulder and fluctuations.