This BeamLab demo calculates the field distributions and effective refractive indices of the eigenmodes of a step-index fiber with a circular core.
BeamLab demo: fiber_modes.m
Refractive index profile of the circular step-index fiber
The following figures show the three field components of the first 4 low-order modes as field contour lines. The black lines indicate the core-cladding boundary.
Mode 1 of the circular step-index fiber
Mode 2 of the circular step-index fiber
Mode 3 of the circular step-index fiber
Mode 4 of the circular step-index fiber
BeamLab is an award-winning set of simulation tools for beam propagation through optical devices and waveguides in your familiar MATLAB® environment. It offers a high flexibility in waveguide design and post-processing of any output data.