To provide an optical component based on a semiconductor light amplifier, having few independent electrodes.

This component is provided with separate regions, having the same vertical structure as that of an active waveguide 20 is embedded between the upper and lower buffer layers. These regions each have a lower and upper electrodes 10, E2, E4 for the purpose of injecting a current density of the same or a different values. The characteristics of this component are that at least one of the electrodes 10 covers several regions and that it has dispersed adjustable resistivity according to the region under consideration.