6. Soliton systems

6.1 What is a soliton?

We will simply recall the important points of the description that has been given in [E 7 110] . The soliton pulse (or simply soliton) is a particular solution of the nonlinear Schrödinger equation, which remains invariant during propagation because the (linear) effect of chromatic dispersion is exactly offset by the (nonlinear) effect of phase self-modulation. Non-linearity is therefore used in a positive way to counterbalance the effect of dispersion and...