Photorefractive combining and shaping properties of amplitude-modulated optical signals by two-wave mixing in Cu-KNSBN crystal

We propose and describe a new configuration for splitting and combining ope rations of high-speed amplitude-modulated optical signals between the two i nteracting beams by using two-wave mixing in photorefractive Cu-doped (K-0. 5 Na-0.5)(0.2) (Sr-0.61 Ba-0.39)(0.9) Nb2O6 (Cu-KNSBN) crystal. These opera tions are simultaneously achieved by changing the intensity ratio of the tw o incident beams. We also apply this scheme to a photorefractive pulse shap ing in the time domain that consists of two amplitude-modulated beams that are coupled automatically through two-beam interactions in the crystal. Som e preliminary experimental results are presented and discussed.