Numerical evaluation of nonlinear optical properties of spiral-shaped ceramic optical fibers

Abstract

A spiral-shaped photonic crystal fiber (SS-PCF) is described in this master’s thesis. The focus of this thesis is to use a fine mesh and the finite element method (FEM) to predict the elemental properties of optical transmission, such as optical nonlinearity, confinement loss, beat length, numerical aperture, birefringence, and effective mode area. Separately employed as core materials, gallium phosphide (GaP), graphene, and tellurite exhibit greater performance than earlier works. Graphene provides extremely high optical nonlinearity which is six orders of magnitude higher than GaP and seven orders of magnitude higher than tellurite at the wavelength range of 0.1 to 1.5 µm. To the best of my knowledge, this SS-PCF is the first to test the performance of these three ceramic objects in optical nonlinear applications. In actuality, the structure’s evanescent fields aid in the modeling process and display a performance outline with a high birefringence of 0.33, a high numerical aperture of 0.86, and a very low confinement loss of 2.86 × 10−9 dB/m. All these results are relevant in nonlinear applications including biological imaging, sensing, supercontinuum optics, polarization maintenance, optical parameter amplification, and others.