Pulse-length dependent acoustic phonon contributions to degenerate four wave mixing in noncentrosymmetric materials

Summary form only given. In solid state materials which lack a center of symmetry, cascaded second order nonlinear optical effects, namely the combination of optical rectification and the linear electro-optic effect, are a very important contribution to DFWM. We have demonstrated that the contributions of acoustic phonons must be taken into account in order to be able to compare DFWM experiments performed with different pulse lengths or experimental setups in noncentrosymmetric materials.