Application ID: 30421
The transmission speed of optical waveguides is superior to microwave waveguides because optical devices have a much higher operating frequency than microwaves, enabling a far higher bandwidth. Single-mode step-index fibers are used for long-haul (even transoceanic) communication, whereas both graded-index and step-index multimode fibers are used for short-distance communication, for example, within institutions and university campuses and buildings.
For almost all commercial optical fiber types, the design consists of a concentric layer structure with the inner layer(s) forming the core and the outer layer(s) forming the cladding. Since the core has a higher refractive index than the cladding, guided modes can propagate along the fiber.
The Optical Fiber Simulator app performs mode analyses on concentric circular dielectric layer structures. Each layer is described by an outer diameter and the real and imaginary parts of the refractive index. The app can be used for analyzing both step-index fibers and graded-index fibers. These fibers may have an arbitrary number of concentric circular layers.
This application example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.