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Abstract

A solid state system for converting the frequency of light emitted in the form of a laser beam using Stimulated Raman Scattering (SRS) and non-linear conversion. A solid Raman-active medium disposed inside the laser resonator shifts the frequency of the laser beam by a characteristic frequency of the medium to generate a Raman beam in accordance with the SRS effect. Another solid non-linear medium is disposed in the laser resonator for shifting the frequency of the Raman beam to generate an output beam at the desired frequency. The solid non-linear medium is a Second Harmonic Generator (SHG), a Sum Frequency Generator (SFG) or a Difference Frequency Generator (DFG) and can also generate an output beam corresponding to the sum output of the laser beam and the Raman beam. The solid Raman-active medium and the solid-non linear medium can be positioned inside a separate secondary resonator to achieve high conversion efficiency. The system is compatible with Q-switching and frequency tuning for ensuring suitable output beam parameters, and is well-suited for guide star applications.

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