Verfahren und Vorrichtung zur Modulation und Verstärkung von Lichtstrahlen

According to the invention, at least one input light beam (8) is sent to at least one Fabry-Perot type resonator having at least one resonance mode, delimited by two mirrors (M1, M2) and made by stacking layers on a substrate (4), at least one of these layers forming an active medium (6) capable of amplifying this input beam by stimulated emission, the wavelength of the beam being around the resonance of the resonator, and the density of free charge carriers in this medium is varied so as to render the latter sometimes absorbent and sometimes amplifying with regard to the input beam and thus to obtain at least one output light beam (10) whose intensity is modulated and amplified relative to the input beam. Application to optical telecommunications and optical interconnections.