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    Wavelength monitor for WDM systems
    2.
    发明授权
    Wavelength monitor for WDM systems 有权
    WDM系统的波长监视器

    公开(公告)号：US06707550B1

    公开(公告)日：2004-03-16

    申请号：US09551256

    申请日：2000-04-18

    申请人： Steven P. Georgis ,  Robert T. Weverka

    发明人： Steven P. Georgis ,  Robert T. Weverka

    IPC分类号： G01J328

    CPC分类号： G02B6/4215 ,  G01J1/4257 ,  G01J3/32 ,  G02B6/2931 ,  G02B6/29313 ,  G02B6/29385 ,  G02B6/29395 ,  H04J14/02

    摘要： A method of monitoring input light having a plurality of spectral bands (wavelength channels) includes the following, carried out for at least two different spectral bands at different times, using a common photodetector and wavelength-monitoring circuit that is coupled to the photodetector: separating one of the spectral bands from the plurality of spectral bands, directing light in only that spectral band to the photodetector, and generating, with the wavelength-monitoring circuit, a signal representing a quality characteristic of a modulated or unmodulated pattern of light in that spectral band. Each of the plurality of spectral bands can be individually and sequentially monitored in round-robin fashion, each of a subset of the spectral bands can be individually and sequentially monitored in round-robin fashion (to provide selective wavelength monitoring), or the monitoring can be ad hoc in response to external requirements. If desired, the opitcal power of the plurality of spectral bands can be monitored by directing the light in the spectral bands other than the band that has been separated from the plurality to an additional common photodetector and a common power-monitoring circuit.

    摘要翻译： 监测具有多个光谱带（波长信道）的输入光的方法包括以下步骤：使用耦合到光电检测器的公共光电检测器和波长监测电路在不同时间对至少两个不同的光谱带进行分离：分离 来自多个光谱带的光谱带之一，仅将光谱带入光电检测器，并且利用波长监视电路产生表示在该光谱中的调制或未调制模式的质量特性的信号 带。 可以以循环方式单独和顺序地监视多个频谱带中的每一个，可以以循环方式（以提供选择性波长监视）单独和顺序地监视频谱带的子集中的每一个，或者监视可以 根据外部要求进行特设。 如果需要，可以通过将除了从多个分离的频带之外的频谱带引导到另外的公共光电检测器和公共功率监视电路来监视多个频谱带的操作功率。

    Fourier optical switch
    5.
    发明授权
    Fourier optical switch 有权
    傅立叶光学开关

    公开(公告)号：US06424756B1

    公开(公告)日：2002-07-23

    申请号：US09397157

    申请日：1999-09-15

    申请人： Robert F. Kalman ,  Robert T. Weverka

    发明人： Robert F. Kalman ,  Robert T. Weverka

    IPC分类号： G02B642

    CPC分类号： G02B6/3594 ,  G02B6/3512 ,  G02B6/3556 ,  G02B2006/12104

    摘要： An optical switch comprises a two-dimensional array of optical inputs, a Fourier transform lens, and a two-dimensional array of optical outputs. Each of the optical inputs emits an optical beam that is transmitted through the Fourier transform lens to one of the optical outputs. A first deflection means gives each of the optical beams a respective direction of incidence upon the Fourier transform lens. The optical output to which a given beam travels depends on the beam's respective direction of incidence. A second deflection means deflects the optical beams after they have been transmitted through the Fourier transform lens and renders the beams parallel, thereby enabling the beams to couple efficiently to the optical outputs. Each of the deflection means preferably comprises at least one Micro-Electro-Mechanical Systems, or MEMS, deflector array. The optical inputs and outputs preferably comprise optical fibers. The Fourier transform lens overcomes diffraction limitations, since the lens causes the spreading optical beams to reconverge.

    摘要翻译： 光学开关包括光学输入的二维阵列，傅里叶变换透镜和光学输出的二维阵列。 每个光输入端发射通过傅里叶变换透镜传输到光输出之一的光束。 第一偏转装置给每个光束在傅立叶变换透镜上的相应入射方向。 给定光束行进的光输出取决于光束的相应入射方向。 第二偏转装置在光束被透射通过傅立叶变换透镜之后使光束偏转并使光束平行，从而使光束有效地耦合到光输出端。 每个偏转装置优选地包括至少一个微机电系统或MEMS导流器阵列。 光输入和输出优选地包括光纤。 傅里叶变换透镜克服了衍射限制，因为透镜使得扩展光束重新变形。