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    METHODS AND APPARATUS FOR COHERENT HOLOGRAPHIC DATA CHANNELS
    1.
    发明公开
    METHODS AND APPARATUS FOR COHERENT HOLOGRAPHIC DATA CHANNELS 审中-公开
    VERFAHREN UND VORRICHTUNGFÜRKOHÄRENTEHOLOGRAPHISCHEDATENKANÄLE

    公开(公告)号：EP3138098A1

    公开(公告)日：2017-03-08

    申请号：EP15786499.2

    申请日：2015-04-29

    申请人： Akonia Holographics, LLC

    发明人： AYRES, Mark R. ,  ANDERSON, Kenneth E. ,  PRUETT, David C. ,  LOECHEL, Will A.

    IPC分类号： G11B7/0065 ,  G11B7/007

    CPC分类号： G11B7/0065 ,  G11B7/128 ,  G11B20/10009 ,  G11B20/10277

    摘要： Methods and devices for coherent holographic data channel techniques are presented. Coherent techniques for data detection generally include homodyne and heterodyne detection. Techniques for quadrature homodyne detection, resampling quadrature homodyne detection, n-rature homodyne detection, and spatial wavefront demodulation are presented. Coherent detection techniques in turn enable coherent channel modulation techniques such as phase modulation (including binary phase shift keying, or BPSK; phase quadrature holographic multiplexing, or QPSK; and quadrature amplitude modulation, or QAM). Coherent detection may also enable or improve the performance of other channel techniques such as partial response maximum likelihood (PRML), the various classes of extended PRML, and of noise-predictive maximum likelihood (NPML) detection.

    摘要翻译： 提出了相干全息数据通道技术的方法和装置。 数据检测的相干技术通常包括零差和外差检测。 提出了正交零差检测技术，重采样正交零差检测，n-rature零差检测和空间波前解调。 相干检测技术又能够实现相位调制技术，例如相位调制（包括二进制相移键控或BPSK;相位正交全息复用或QPSK;以及正交幅度调制或QAM）。 相干检测还可以实现或改善其他信道技术的性能，例如部分响应最大似然（PRML），各种类型的扩展PRML以及噪声预测最大似然（NPML）检测。

    DYNAMIC APERTURE HOLOGRAPHY
    2.
    发明公开
    DYNAMIC APERTURE HOLOGRAPHY 审中-公开
    具有动态光圈全息

    公开(公告)号：EP2948948A4

    公开(公告)日：2016-08-03

    申请号：EP14743821

    申请日：2014-03-21

    申请人： AKONIA HOLOGRAPHICS LLC

    发明人： AYRES MARK ,  ANDERSON KENNETH ,  ASKHAM FREDRIC ,  SISSOM BRADLEY

    IPC分类号： G11B7/0065 ,  G03H1/28

    CPC分类号： G03H1/265 ,  G03H1/0248 ,  G03H1/2645 ,  G03H2001/267 ,  G11B7/0065 ,  G11B7/00772 ,  G11B7/1381

    摘要： Systems and methods for dynamic aperture holographic multiplexing are disclosed. One example process may include recording a set of holograms in a recording medium by varying both the reference beam angular aperture and the signal beam angular aperture. The angular aperture of the signal beam may be dynamically changed such that the closest edge of each signal beam angular aperture is selected to be a threshold angle different than the angular aperture of the reference beam used to record it. In some examples, the dynamic aperture holographic multiplexing process may include dynamic aperture equalization to reduce cross-talk, to improve error correction parity distribution for improved recovery transfer rate, to provide multiple locus aperture sharing for increased recording density, and to provide polarization multiplexed shared aperture multiplexing for increased transfer rate in both recording and recovery.