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1.发明授权
公开(公告)号：US5606664A
公开(公告)日：1997-02-25
申请号：US46405
申请日：1993-04-12
申请人： Brian Brown , Shabbir A. Chowdhury , Jean-Luc Fontaine , Chao-Yu Liang , Ronald V. Schmidt , Chang-Jung Wang
发明人： Brian Brown , Shabbir A. Chowdhury , Jean-Luc Fontaine , Chao-Yu Liang , Ronald V. Schmidt , Chang-Jung Wang
CPC分类号： H04L41/12 , G06F11/3006 , G06F11/3048 , G06F11/3055 , H04L41/22 , H04L41/24 , H04L41/26 , G06F11/32 , Y10S715/969 , Y10S715/97
摘要： Apparatus for monitoring and displaying the status of a local area network. The network includes a hub with ports for connection to various data terminal equipment in a star configuration and for connection to other hubs of the network. The hubs each have different types of plug-in modules which have ports for connecting the hub to different types of network cable such as fiber optic cable, unshielded twisted pair cable and shielded twisted pair cable. Information is automatically provided to a control console identifying the types of modules and the location of the modules in the hub so that an image of the actual hub can be displayed on the screen of the control console. The actual hub image shows the location and types of modules installed in the hub. In addition, information regarding the connection of each of the hubs to other hubs of the network is obtained and provided to the control console. The information is processed so as to automatically produce a topology map on the control console display showing the overall topology of the network.
摘要翻译： 用于监视和显示局域网状态的装置。 该网络包括具有用于连接到星形配置中的各种数据终端设备并用于连接到网络的其他集线器的端口的集线器。 集线器各有不同类型的插入式模块，它们具有用于将集线器连接到不同类型的网络电缆的端口，例如光纤电缆，非屏蔽双绞线电缆和屏蔽双绞线电缆。 信息自动提供给控制台，以便识别模块的类型和集线器中模块的位置，以便可以在控制台的屏幕上显示实际集线器的图像。 实际的集线器映像显示了集线器中安装的模块的位置和类型。 此外，获得关于每个集线器与网络的其他集线器的连接的信息并将其提供给控制台。 处理信息，以便在控制台显示屏上自动生成拓扑图，显示网络的总体拓扑。
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公开(公告)号：US4211467A
公开(公告)日：1980-07-08
申请号：US869364
申请日：1978-01-13
申请人： Peter S. Cross , Ronald V. Schmidt
发明人： Peter S. Cross , Ronald V. Schmidt
CPC分类号： G02F3/022 , G02F1/3132 , G02F2201/125
摘要： An integrated optically-controlled 4-port bistable switch having a waveguide directional coupler as one of its elements is disclosed. A photodetector is positioned so as to be sensitive to the optical energy at one output port of the directional coupler and the voltage developed by this photodetector is coupled to electrode elements of the directional coupler. The resulting bistable device permits such functions as remote optical switching to be performed.
摘要翻译： 公开了一种具有作为其元件之一的波导定向耦合器的集成的光控4端口双稳态开关。 光电检测器被定位成对定向耦合器的一个输出端口处的光能敏感，并且由该光电检测器产生的电压耦合到定向耦合器的电极元件。 所得到的双稳态器件允许执行远程光学切换的功能。
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3.发明授权
公开(公告)号：US4531238A
公开(公告)日：1985-07-23
申请号：US326869
申请日：1981-12-03
IPC分类号： H04B10/20 , H04B10/16 , H04B10/207 , H04L12/44 , H04B9/00
CPC分类号： H04B10/27 , H04B10/272 , H04B10/29 , H04L12/44
摘要： An active repeater for a star configured communications network includes a threshold detector for collision detection. Whenever two or more terminals simultaneously feed data into the repeater, a threshold sensitive collision detector is triggered to logically isolate the data from the output of the repeater and to logically substitute a predetermined collision signal therefor, thereby causing the competing terminals to reset to retry the transmissions at randomly selected later times.
摘要翻译： 用于星形配置通信网络的主动中继器包括用于冲突检测的阈值检测器。 每当两个或多个终端同时将数据馈送到中继器时，触发阈值敏感的冲突检测器将数据与中继器的输出逻辑隔离，并逻辑地替代预定的冲突信号，从而使竞争的终端重新设置以重试 后续随机选择的传输。
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公开(公告)号：US4278321A
公开(公告)日：1981-07-14
申请号：US80092
申请日：1979-09-28
CPC分类号： G02B6/2821 , G02B6/125 , G02B6/2804 , G02B2006/2865
摘要： By randomly varying the difference in the phase constants and/or the coupling coefficient along the lengths of two or more wavepaths, an equal division power divider is obtained whose operation is not critically dependent upon its dimensions.
摘要翻译： 通过沿着两个或更多个波形路径的长度随机地改变相位常数和/或耦合系数的差异，可以获得等分功率分配器，其操作不依赖于其尺寸。
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公开(公告)号：US4284663A
公开(公告)日：1981-08-18
申请号：US104676
申请日：1979-12-17
CPC分类号： C04B41/009 , C04B41/51 , C04B41/88 , C30B29/30 , C30B31/02 , G02B6/1342 , Y10T29/49885
摘要： There is disclosed a method of fabricating an optical waveguiding surface layer in an optically transparent crystalline substrate, such as lithium niobate, by selectively indiffusing metal ions, such as titanium, into the crystal to effect an increase in the index of refraction of a surface portion thereof. The indiffused metal ions serve to raise both the ordinary and extraordinary refractive indices of the substrate by amounts which are of the order of one percent at the diffusion surface and which gradually decrease by one-half at depths of the order of one micrometer below the surface. By properly adjusting the relevant diffusion parameters in the method, the important surface waveguide characteristics can be independently controlled.
摘要翻译： 公开了通过在晶体中选择性地将诸如钛的金属离子这种诸如钛的方式，将诸如铌酸锂的光学透明的晶体衬底制造光学波导表面层的方法来增加表面部分的折射率 其中。 不扩散的金属离子用于通过在扩散表面上为1％量级的量提高基底的普通和非凡的折射率，并且在表面下方一微米级的深度逐渐减少二分之一 。 通过适当调整方法中的相关扩散参数，可以独立控制重要的表面波导特性。
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公开(公告)号：US4146297A
公开(公告)日：1979-03-27
申请号：US869515
申请日：1978-01-16
CPC分类号： G02F1/3132 , G02F2203/055
摘要： An integrated optical filter composed of coupled nonidentical strip waveguides in LiNbO.sub.3 is disclosed. The device has a broad bandwidth, is tunable over several hundred angstroms, and offers electrical control of the crossover efficiency. Several devices are combined on a single substrate to provide an electrically tunable multiplexer or demultiplexer.
摘要翻译： 公开了一种由LiNbO3中的耦合不相干条形波导构成的集成滤光器。 该器件具有宽带宽，可调超过几百埃，并提供交叉效率的电气控制。 将多个器件组合在单个衬底上以提供电可调谐多路复用器或解复用器。
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7.发明授权
公开(公告)号：US4155056A
公开(公告)日：1979-05-15
申请号：US827576
申请日：1977-08-25
申请人： Peter S. Cross , Ronald V. Schmidt
发明人： Peter S. Cross , Ronald V. Schmidt
CPC分类号： H03H9/02771 , H03H9/02645 , H03H9/643 , H03H9/6446
摘要： Acoustical and optical surface wave filters are described wherein the filter characteristic near resonance is provided by cascaded grating resonators. The out-of-band suppression for these resonators is provided by a track changing element that includes a four-port directional coupler having one port connected to receive input energy and a fourth port connected to couple energy into the cascaded grating resonators. Tapered and chirped reflection gratings are positioned so as to selectively reflect energy present at the second and third ports of the directional coupler. In a surface acoustic wave embodiment of the invention, the directional coupler is provided by a multistrip coupler. In an optical embodiment, the directional coupler function is provided by waveguiding structures that are brought sufficiently close to induce 3 dB coupling.
摘要翻译： 描述了声学和光学表面波滤波器，其中谐振附近的滤波器特性由级联的光栅谐振器提供。 这些谐振器的带外抑制由轨道改变元件提供，轨道改变元件包括具有连接以接收输入能量的一个端口的四端口定向耦合器和连接成将能量耦合到级联光栅谐振器中的第四端口。 锥形和啁啾反射光栅被定位成选择性地反映存在于定向耦合器的第二和第三端口处的能量。 在本发明的声表面波实施例中，定向耦合器由多段耦合器提供。 在光学实施例中，定向耦合器功能由足够接近的波导结构提供，以引起3dB耦合。
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