Theoretical considerations
Interconnexions optiques

There are two approaches to understanding the propagation of electromagnetic radiation in fibers. A comparison of these two approaches will help us to understand the rest of the presentation. The first approach, which is simpler to equate, is based on the Snell-Descartes laws of geometrical optics. The second approach takes into account the fact that light is electromagnetic radiation, and is therefore based on the solution of Maxwell's equations.

2.1.1 Geometric optical approach