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    • 10. 发明授权
    • Fiber optic communication method and apparatus providing mode
multiplexing and holographic demultiplexing
    • 提供模式复用和全息解复用的光纤通信方法和装置
    • US5136666A
    • 1992-08-04
    • US741003
    • 1991-08-06
    • Dana Z. AndersonMark E. Saffman
    • Dana Z. AndersonMark E. Saffman
    • G02B6/24H04B10/213
    • G02B6/24
    • In a fiber optic communication system, an acoustooptic modulator operates to provide a coherent light beam that is data encoded in the beam's time domain, for example by intensity modulation of the beam. A spatial light modulator then operates to address encode the beam by modulating the beam in the space domain. The resulting data and address modulated beam possesses the property of orthogonality. This beam is now transmitted to the input of a multimode optical fiber. The speckle pattern that exits the output of the optical fiber also exhibits orthogonality. This output beam is presented to a beam splitter in order to produce two spatially modulated speckle light patterns therefrom. These two beams are then focused onto photorefractive means whereat a hologram is produced. This hologram operates to address decode the beam output of the optical fiber. Detector means now operates to detect the data by receiving the beam as it is diffracted by the hologram. Ring and star interconnect networks are described.
    • 在光纤通信系统中,声光调制器操作以提供在波束的时域中编码的数据的相干光束,例如通过光束的强度调制。 然后,空间光调制器通过调制空间域中的波束来操作以对波束进行编码。 得到的数据和地址调制波束具有正交性质。 该光束现在被传输到多模光纤的输入。 离开光纤输出的斑点图案也具有正交性。 该输出光束被呈现给分束器以从其产生两个空间调制的散斑光图案。 然后将这两个光束聚焦到产生全息图的光折射装置上。 该全息图用于解码光纤的光束输出。 检测器装置现在操作以通过在被全息图衍射的同时接收光束来检测数据。 描述了环形和星形互连网络。