Bound states of plain and composite pulses: Multi-soliton solutions
We investigate numerically the formation and stability characteristics of bound states in the complex GinzburgLandau equation, considering both plain and composite pulses. Our numerical results show the existence of stable bound states of two plain or composite pulses when the phase difference between them is ?/2  ? / 2 . Two-composite pulses bound states have zero velocity, which is in contrast with the behavior of the bound states formed by plain pulses. The possibility of constructing multi-soliton solutions is demonstrated. In particular, we show the possibility of constructing stable bound states of multiple plain pulses with zero velocity by choosing appropriately the phase profile of the whole solution.
optical solitons nonlinear fiber optics optical communications optical fiber amplifiers