Phase Conjugation Properties and Holographic Associative Storage of Zn∶Mn∶Fe∶LiNbO₃Crystals

Zn∶Mn∶Fe∶LiNbO3 crystals with 1%,3%,5%,7% and 9%,ZnO(in mole) and MnCO3 and Fe2O3,added at concentration of 0.03%and 0.08(in mass)respectively,were grown by Czochralski method from congruent LiNbO3 melting.The OH-infrared absorption spectra,the optical damage resistance and phase conjugate properties of Zn∶Mn∶Fe∶LiNbO3 crystals were tested.When Zn2+ concentration reaches 7% and 9%,OH-absorption peaks shift to 3 528 cm-1.The mechanism of OH-1 absorption peaks shift were discussed.The optical damage resistance ability of Zn∶Mn∶Fe∶LiNbO3 crystals increase,with the increase of Zn2+ concentration.When Zn2+ concentration reaches to 7%(reaches threshold value),the optical damage resistance ability are two orders of magnitude higher than that of LiNbO3 crystals.The enhancement mechanism of optical damage resistance of highly doping zinc Mn:Fe: LiNbO3 crystals was researched.The bhase conjugate reflectivity decreases and phase conjugate response speed increases,with the increase of Zn2+ concentration.The phase conjugate mirror has eliminate optical wave phase distortion.The holographic associative storage experiment was carried out using Zn∶Mn∶Fe∶LiNbO3 crystals as storage medium.The working principle of holographic associative storage was discussed.Using 25% and 50% addressing,the intact storage image was received in output plane.