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    Diffractive fourier optics for optical communications
    1.
    发明申请
    Diffractive fourier optics for optical communications 失效
    用于光通信的衍射光栅

    公开(公告)号：US20030011769A1

    公开(公告)日：2003-01-16

    申请号：US10187855

    申请日：2002-07-03

    申请人： Arroyo Optics, Inc.

    发明人： George Rakuljic ,  Anthony S. Kewitsch ,  Victor Leyva

    IPC分类号： G01J003/28

    CPC分类号： G02B6/2931 ,  G02B6/2713 ,  G02B6/272 ,  G02B6/2773 ,  G02B6/2793 ,  G02B6/29311 ,  G02B6/29313 ,  G02B6/29391 ,  G02B6/29395 ,  G02B6/29397 ,  G02B6/29398 ,  G02B6/32 ,  H04J14/02 ,  H04J14/0221

    摘要： Systems and methods for modifying, switching, rearranging or otherwise controlling the individual wavelength components of DWDM optical signals are described, which employ compact refolding and reshaping of these dimensionally patterned beams within a confined volume. The wavelength components of the beam are diffractively dispersed with high diffraction efficiency, and then reversely converged to beam waists incident on different ones of an array of control elements such as liquid crystal cells, MEMs and other spatial light modulators, or fixed distributed patterns. With reflective control elements the wavelength components may be reversely refolded along reciprocal paths with rediffraction, to form a reconstituted and revised DWDM output signal. If the control elements transmit at least one of the wavelength components, a separate, adjacent three dimensional beam refolding path, with rediffraction, is used to feed recombined signals to a separate output. High diffraction efficiency and minimal optical aberrations are achieved by employing a diffraction grating and opposed Mangin mirror system as the principal elements for beam refolding. The approach is useful in systems servicing narrow channel separations, and in a wide variety of applications including channel equalization, interleaving, channel blocking, and channel grouping.

    摘要翻译： 描述了用于修改，切换，重新布置或以其他方式控制DWDM光信号的各个波长分量的系统和方法，其在限制体积内采用紧凑的重折叠和这些尺寸图案化的束的重新成形。 光束的波长分量以高衍射效率衍射分散，然后反向收敛到入射到诸如液晶单元，MEM和其它空间光调制器或固定分布图案的控制元件阵列上的不同阵列上的波束。 使用反射控制元件，波长分量可以沿着具有红移的互逆路径反向重折叠，以形成重构和修改的DWDM输出信号。 如果控制元件传输至少一个波长分量，则使用具有红移的单独的相邻三维光束重折叠路径将重新组合的信号馈送到单独的输出。 通过使用衍射光栅和相对的Mangin镜系统作为光束重折叠的主要元件，实现了高衍射效率和最小的光学像差。 该方法在服务于窄信道分离的系统中以及在各种应用中是有用的，包括信道均衡，交织，信道阻塞和信道分组。

    Liquid crystal modulator and polarization diversity optics for optical communications
    3.
    发明申请
    Liquid crystal modulator and polarization diversity optics for optical communications 失效
    用于光通信的液晶调制器和极化分集光学器件

    公开(公告)号：US20030095305A1

    公开(公告)日：2003-05-22

    申请号：US10209879

    申请日：2002-08-02

    申请人： Arroyo Optics, Inc.

    发明人： Anthony S. Kewitsch ,  George Rakuljic ,  Victor Leyva

    IPC分类号： H04B010/24

    CPC分类号： G02B6/2931 ,  G02B6/2713 ,  G02B6/272 ,  G02B6/2773 ,  G02B6/2793 ,  G02B6/29311 ,  G02B6/29313 ,  G02B6/29391 ,  G02B6/29395 ,  G02B6/29397 ,  G02B6/29398 ,  G02B6/32 ,  H04J14/02 ,  H04J14/0221

    摘要： For systems which disperse individual wavelength components of a DWDM beam into an array of converging beams, the individual wavelength signals are modified for blocking, equalization or other purposes by reflective liquid crystal cells. Thus modulated or modified components are then recombined by the system into an output beam, as by reverse passage through the system. Controlled full extinction or linear attenuation may be introduced by converging asymmetrical beams of separate polarization components for each wavelength into superposed relation on zero twist nematic crystal cells which are voltage controlled so as to retard for extinction of greater than 40 dB or to transform the state of polarization to a selected angle for attenuation. Polarization sensitive elements in the return paths of the reflected beams then filter the rejected components.

    摘要翻译： 对于将DWDM光束的各个波长分量分散成会聚光束阵列的系统，通过反射型液晶单元修改各个波长信号用于阻挡，均衡或其他目的。 因此，经过系统的反向通过，调制或修改的组件然后由系统重新组合成输出光束。 控制的全消光或线性衰减可以通过将每个波长的分离的偏振分量的不对称光束会聚在零扭转向列型晶体单元上，将它们叠加在零扭转向列型晶体单元上，以进行电压控制，从而延迟大于40dB的消光或将 极化到选定的角度进行衰减。 反射光束的返回路径中的偏振敏感元素然后过滤被拒绝的成分。