Self-tunable optical filter comprising at least one dispersive element (D1, D2) for spatially separating and then recombining the different spectral components of a light beam, and a filter element (NLA) disposed in the path of the scattered light beam for performing a bandpass filtering, characterized in that said filter element is a nonlinear element introducing a selective attenuation of said spectral components, all the lower as their spectral intensity is high. Source or laser system, in particular semiconductor, comprising such a filter. Use of such a self-tunable optical filter to select a main spectral peak of a laser beam. A method of filtering a light beam
展开▼
