Simulación computacional de una fibra óptica con índice escalonado y propagación multimodal

Abstract

In this paper the computational simulation of electromagnetic propagation multimodal inside an optical fiber with step index is performed. A sinusoidal source placed at the left end feeds an electromagnetic field to the optical fiber; fiber layers are modeled staggered to achieve total internal reflection of the incident light according to the wave theory of light. The simulation is performed using tools of computational electromagnetics such as Method Finite Difference Time Domain (FDTD) and the method of perfectly matched layers (PML) as boundary condition absorption to prevent electromagnetic propagation continue to infinity. The operating frequency is 187 THz used and the wavelength of 1600nm is, this simulation is achieved by developing a computational algorithm in Matlab. electromagnetic parameters propagated in the core of the optical fiber such as magnetic field components $Hx$ and $Hy$ and $Ez$ electric field are obtained. We want students to achieve understanding of the behavior of light as an electromagnetic wave inside the optical fiber, it may be something that might be perceived as simple, however, we are sure to see the electromagnetic propagation according to the results allowing clearly interpret these optical phenomena.