LASER WITH TUNALBE EMISSION SPECTRUM Russian patent published in 2010 - IPC H01S3/10 

FIELD: physics.

SUBSTANCE: laser has an active element which emits a beam of radiation at different wavelengths during pumping and a spatial light modulator. The laser resonator has an output partially reflecting flat mirror lying on the optical axis of the resonator in front of the active element, a flat totally reflecting mirror lying on the optical axis of the resonator after the spatial light modulator, a prism composite system and a quarter-wave retarder, arranged in series on the optical axis of the resonator between the active element and the spatial light modulator. The prism composite system consists of an even number of optically interfaced identical 2N triangular prisms, where N is greater than or equal to 1. The prisms are arranged such that planes of the input and output faces of any i-th prism are parallel planes of the output and input faces of the [(2N+1)-i]-th prism respectively, where i varies from 1 to N. The spatial light modulator is made in form of an electrically controlled plate lying orthogonally to the optical axis of the resonator, with linear control electrodes which are parallel to the intersection line of the planes of the input and output faces of the last prism in the prism composite system. The spatial light modulator is connected to a voltage unit which is made with possibility of programmed control of the value of voltage across electrodes of the spatial light modulator.

EFFECT: generation of radiation with real time control of the number and length of waves of emitted spectral components using a laser with tunable emission spectrum with high operating reliability of the laser.

3 cl, 1 dwg