Nonlinear-laser effects in $\chi^{(3)}$- and $\chi^{(2)}$-active organic single crystals

The process of stimulated Raman scattering (SRS) allows to convert laser emission wavelength of crystals providing suitable molecular or lattice mode which contribute to the third order nonlinear optical susceptibility. Renewed interest in this field emerged because of the discovery of SRS in crystals that contain molecular units exhibiting Raman active modes. Particularly, organic nolinear optical crystals used so far frequency doubling and third harmonic generation seem to have a great potential for SRS application. This review paper reported same results on an efficient SRS lasing effects that were discovered recently in organic crystals.