公开(公告)号：US06835368B2

公开(公告)日：2004-12-28

申请号：US09881836

申请日：2001-06-18

Applicant: Yongfa Kong ,  Jingjun Xu ,  Guangao Li ,  Qian Sun ,  Baiquan Tang ,  Hui Huang ,  Ziheng Huang ,  Shaolin Chen ,  Xiaojun Chen ,  Guangyin Zhang

Inventor： Yongfa Kong ,  Jingjun Xu ,  Guangao Li ,  Qian Sun ,  Baiquan Tang ,  Hui Huang ,  Ziheng Huang ,  Shaolin Chen ,  Xiaojun Chen ,  Guangyin Zhang

IPC: C01D102

CPC classification number: G11B7/243 ,  C01G33/00 ,  C01G49/009 ,  C01P2002/52 ,  C01P2006/80 ,  G11B7/0065 ,  G11B7/26 ,  G11C13/041

Abstract: This invention relates to the field of materials of the photorefractive crystal. The composition of these crystals is Li1−xNb1+yO3: Fem, Mn, where M can be magnesium, indium, or zinc; when using q to denote the ion valence of M (q=2 when M is Mg or Zn, and q=3 when M is In), the values of x, y, m, and n are in the range of 0.05≦x≦0.13, 0.00≦y≦0.01, 5.0×10−5≦m≦7.5×10−4, and 0.02≦qn≦0.13. This invention greatly improves the photorefractive properties of LiNbO3 crystals: makes it have a high diffraction efficiency (more than 68%), a fast response speed for photorefraction (an order of magnitude faster than iron doped LiNbO3), and a high resistance to optical scattering (the light intensity threshold to photorefractive fan scattering near two orders of magnitude larger than LiNbO3: Fe). This invention is an excellent three-dimensional optical storage material and has a vast potential market.

Abstract translation: 本发明涉及光折射晶体的材料领域。 这些晶体的组成为Li1-xNb1 + yO3：Fem，Mn，其中M可以是镁，铟或锌; 当使用q表示M的离子价（当M是Mg或Zn时为q = 2，当M为In时为q = 3），x，y，m和n的值在0.05 <= x <= 0.13,0.00 <= y <= 0.01,5.0×10 -5≤= 7.5×10 -4，0.02 <= q n <= 0.13。 本发明大大提高了LiNbO3晶体的光折射性能：使其具有高的衍射效率（大于68％），光折射的快速响应速度（比掺杂铁的LiNbO 3快一个数量级）和高的光散射性 （光强度阈值对光折变散射散射近于两个数量级大于LiNbO3：Fe）。 本发明是一种优良的三维光学存储材料，具有广阔的市场潜力。

公开(公告)号：US06738337B2

公开(公告)日：2004-05-18

申请号：US09875947

申请日：2001-06-08

Applicant: Jingjun Xu ,  Qian Sun ,  Xinzheng Zhang ,  Hui Huang ,  Qiang Wu ,  Baiquan Tang ,  Haijun Qiao ,  Guangyin Zhang ,  Zuojin Sha

Inventor： Jingjun Xu ,  Qian Sun ,  Xinzheng Zhang ,  Hui Huang ,  Qiang Wu ,  Baiquan Tang ,  Haijun Qiao ,  Guangyin Zhang ,  Zuojin Sha

IPC: G11B700

CPC classification number: G11B7/0065 ,  G03H1/265 ,  G03H2260/54 ,  G11B7/127 ,  G11B7/128 ,  G11B7/135 ,  G11B7/1362 ,  G11B7/2433

Abstract: The invention relates to the information storage. It consists of a computer, a precise rotary table, a writing laser source, a readout laser source, a spatial filter, a spatial light modulator, lens, mirrors, photorefractive crystals (such as doubly doped lithium niobate), and a phase-mismatch adjustor; Due to used a green light (532 nm) as the writing light, and a red light (670 nm) as the readout light, the signal-to-noise ratio is improved greatly and the problem of fixing the stored information is solved. The transmission configuration is used to realize the high-density digital storage in which the irregular lens is designed to work as a phase-mismatch adjustor and read out the whole stored image with no distortion and loss. The dynamically differential encoding and decoding technique is used to suppress the bit-error-rate to lower than 10−6.

Abstract translation: 本发明涉及信息存储。 它由计算机，精密旋转台，写入激光源，读出激光源，空间滤波器，空间光调制器，透镜，反射镜，光折射晶体（例如双重掺杂的铌酸锂）组成，以及相位失配 调节器 由于使用绿光（532nm）作为写入光，并且使用红光（670nm）作为读出光，所以信噪比大大提高，并且解决了存储信息的固定问题。 传输配置用于实现高密度数字存储，其中不规则透镜被设计为用作相位失配调节器，并且在没有失真和损耗的情况下读出整个存储的图像。 使用动态差分编码和解码技术来将比特误码率抑制到低于10 -6。