We propose and experimentally investigate a new scheme capable of suppressing the light-induced scattering by periodical incoherent erasure during every non-volatile holographic recording cycle in photochromic LiNbO_(...We propose and experimentally investigate a new scheme capable of suppressing the light-induced scattering by periodical incoherent erasure during every non-volatile holographic recording cycle in photochromic LiNbO_(3):Fe:Mn crystals.The results demonstrate that the scattering noise is suppressed effectively,and the final diffraction efficiency of the fixed grating is significantly enhanced,rather than decrease,by about 30%compared with the conventional recording procedure.The period of the recording and incoherent erasure cycle is theoretically calculated and experimentally optimized.展开更多
The Kukhtarev two-center model for photochromic doubly doped LiNbO_(3):Fe:Mn crystals is both numerically and analytically solved for the recording sensitivity and the fixed nonvolatile space-charge field.An optimal p...The Kukhtarev two-center model for photochromic doubly doped LiNbO_(3):Fe:Mn crystals is both numerically and analytically solved for the recording sensitivity and the fixed nonvolatile space-charge field.An optimal prescription for material doping and oxidation/reduction processing is found,which requires that the crystal should be strongly oxidized together with a suitable Mn density with respect to the Fe density.Experiments performed with an oxidized crystal and a reduced crystal prove the prediction.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.69837020the Chinese Academy of Sciences。
文摘We propose and experimentally investigate a new scheme capable of suppressing the light-induced scattering by periodical incoherent erasure during every non-volatile holographic recording cycle in photochromic LiNbO_(3):Fe:Mn crystals.The results demonstrate that the scattering noise is suppressed effectively,and the final diffraction efficiency of the fixed grating is significantly enhanced,rather than decrease,by about 30%compared with the conventional recording procedure.The period of the recording and incoherent erasure cycle is theoretically calculated and experimentally optimized.
基金Supported by the National Natural Science Foundation of China under Grant No.69837020,and the Hundred Talents Program of Chinese Academy of Sciences.
文摘The Kukhtarev two-center model for photochromic doubly doped LiNbO_(3):Fe:Mn crystals is both numerically and analytically solved for the recording sensitivity and the fixed nonvolatile space-charge field.An optimal prescription for material doping and oxidation/reduction processing is found,which requires that the crystal should be strongly oxidized together with a suitable Mn density with respect to the Fe density.Experiments performed with an oxidized crystal and a reduced crystal prove the prediction.
