Discrete and continuous tuning in the visible range by intracavity stimulated Raman scattering in nonlinear crystals

An analysis is reported of the effectiveness of the method of expanding the range of frequencies generated in a laser system by stimulated Raman scattering and subsequent frequency summation. It is shown that the most promising are noncentrosymmetric crystals with a strong electronic nonlinearity. Experimental results are reported on stimulated Raman scattering and nonlinear summation in LiIO₃, LiNbO₃, KDP (potassium dihydrogen phosphate), and KTP (potassium titanyl phosphate) crystals.