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    Tilt multiplex holography
    4.
    发明授权
    Tilt multiplex holography 失效
    倾斜复用全息术

    公开(公告)号：US5703705A

    公开(公告)日：1997-12-30

    申请号：US435706

    申请日：1995-05-05

    申请人： Kevin Curtis ,  William Larry Wilson

    发明人： Kevin Curtis ,  William Larry Wilson

    IPC分类号： G03H1/26 ,  G11B7/0065 ,  G03B1/26 ,  G03B1/28 ,  G11B7/007 ,  G11B11/12

    CPC分类号： G11B7/0065 ,  G03H1/2645 ,  G03H1/265

    摘要： A system for high density holographic storage announced by Cal Tech is improved. The basic Cal Tech system records successive holograms by physically shifting the recording medium relative to the paired reference and signal beams. By depending on Bragg selectivity, successive holograms may be overlapped and still differentiated in the direction of overlap--in the "x-direction". The claimed system improves storage density by tilting the holographic plane to introduce a Bragg component in the y-direction, thereby enabling differentiation of overlapping holograms in that direction as well.

    摘要翻译： Cal Tech宣布的高密度全息存储系统得到改进。 基本的Cal Tech系统通过相对于成对的参考和信号光束物理移位记录介质来记录连续的全息图。 通过依赖于布拉格选择性，连续的全息图可以在“x方向”上重叠并且在重叠方向上仍然不同。 所要求保护的系统通过倾斜全息平面以在y方向上引入布拉格分量来提高存储密度，从而能够在该方向上区分重叠的全息图。

    System comprising optical semiconductor waveguide device
    6.
    发明授权
    System comprising optical semiconductor waveguide device 失效
    系统包括光半导体波导器件

    公开(公告)号：US06888863B1

    公开(公告)日：2005-05-03

    申请号：US09608639

    申请日：2000-06-30

    申请人： Yongqin Chen ,  William Larry Wilson

    发明人： Yongqin Chen ,  William Larry Wilson

    IPC分类号： G02B6/42 ,  G02B6/02 ,  H01S5/028 ,  H01S5/062 ,  H01S5/10 ,  H01S5/125 ,  H01S5/14 ,  H04B10/04 ,  H04B10/06 ,  H04B10/14 ,  H04B10/26 ,  H04B10/28 ,  H01S5/00

    CPC分类号： H01S5/146 ,  H01S5/0286 ,  H01S5/06213 ,  H01S5/1014 ,  H01S5/1032 ,  H01S5/106 ,  H01S5/1064

    摘要： An improved optical communication system is provided, the system particularly suited for so-called short-haul applications, e.g., applications involving transmission over distances less than 100 km, such as metro applications. The system uses an external cavity laser made up of a gain medium that comprises an active region, a beam expanding region, and an antireflective layer, an optical waveguide located adjacent the gain medium, and a Bragg grating integral with or coupled to the optical waveguide. The medium and the optical waveguide, due to the beam expanding region, exhibit a coupling efficiency of at least 40%, advantageously at least 50%, even in the absence of coupling optics, and the laser is configured and operated to emit at least two modes.

    摘要翻译： 提供了一种改进的光通信系统，该系统特别适用于所谓的短距离应用，例如涉及距离小于100km的传输的应用，例如城域应用。 该系统使用由增益介质组成的外腔激光器，该增益介质包括有源区，光束扩展区和抗反射层，位于增益介质附近的光波导，以及与光波导成一体或耦合到光波导的布拉格光栅 。 即使在不存在耦合光学器件的情况下，介质和光波导由于光束扩展区域的耦合效率至少为40％，有利地为至少50％，并且激光器被配置和操作以发射至少两个 模式。

    System and method for controlling the selectivity of a holographic memory system
    8.
    发明授权
    System and method for controlling the selectivity of a holographic memory system 有权
    用于控制全息存储系统的选择性的系统和方法

    公开(公告)号：US06178019B1

    公开(公告)日：2001-01-23

    申请号：US09304031

    申请日：1999-05-03

    申请人： William Larry Wilson

    发明人： William Larry Wilson

    IPC分类号： G03H110

    CPC分类号： G11C13/042 ,  G11B7/0065

    摘要： A system and method for controlling the selectivity function in a holographic memory system that permits more rapid location and retrieval of holographically stored data. The system and method direct a reference beam through a filter such as, for example, an aperture, to bandwidth limit the beam before the beam illuminates a holographic optical element having stored therein a hologram of a reference beam.

    摘要翻译： 一种用于控制全息存储系统中的选择性功能的系统和方法，其允许更快速地定位和检索全息存储的数据。 系统和方法通过诸如孔径的滤波器引导参考光束，以在光束照射其中存储有参考光束的全息图的全息光学元件之前限制光束的带宽。

    Process for holography using reference beam having correlated phase content
    9.
    发明授权
    Process for holography using reference beam having correlated phase content 有权
    使用具有相关相位含量的参考光束进行全息术的方法

    公开(公告)号：US06191875B1

    公开(公告)日：2001-02-20

    申请号：US09363336

    申请日：1999-07-29

    申请人： Kevin Richard Curtis ,  Peter B. Littlewood ,  Partha Pratim Mitra ,  William Larry Wilson

    发明人： Kevin Richard Curtis ,  Peter B. Littlewood ,  Partha Pratim Mitra ,  William Larry Wilson

    IPC分类号： G03H112

    CPC分类号： G11C13/042 ,  G03H2001/2675

    摘要： An improved process for holography is provided, in which the reference beam used for storage and readout has a correlated phase content. In particular, it was found that reference beams having random phase content limited the attainable storage density and the accuracy of readout of stored holograms due to uncontrolled fluctuations in the correlation selectivity. By contrast, a reference beam having correlated phase content provides accurate shift selectivity, the ability to tailor the reference beam spectrum to minimize crosstalk between neighboring holograms, and mitigation of limitations inherent in the holographic system or holographic medium. Improved storage density and readout accuracy are thereby attained.

    摘要翻译： 提供了一种用于全息术的改进方法，其中用于存储和读出的参考光束具有相关的相位内容。 特别地，发现具有随机相位含量的参考光束由于相关选择性的不受控制的波动而限制了可获得的存储密度和存储的全息图的读出精度。 相反，具有相关相位内容的参考光束提供精确的偏移选择性，定制参考光束光谱以最小化相邻全息图之间的串扰的能力以及全息系统或全息介质中固有的限制的减轻。 由此可以获得改善的存储密度和读出精度。