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26 条记录 (耗时 0.012 秒)

    Network apparatus and method for providing two-way broadband communications
    1.
    发明公开
    Network apparatus and method for providing two-way broadband communications 失效
    对于Zweiwegbreitbandkommunikation网络设备和方法

    公开(公告)号：EP0762766A3

    公开(公告)日：1997-11-05

    申请号：EP96303820.3

    申请日：1996-05-29

    申请人： AT&T Corp.

    发明人： Bodeep, George E. ,  Gnauck, Alan H. ,  Darcie, Thomas Edward ,  Lu, Xiaolin ,  Woodward, Sheryl Leigh

    IPC分类号： H04N7/173

    CPC分类号： H04N7/17309

    摘要： A converter apparatus (Mini Fiber Node MFN) (403) for use in a communication network (e.g., a coax network) includes a signal distribution unit (e.g., fiber node FN) (420) for transmitting frequency-division multiplexed communication signals downstream over a coax cable (141) to a node apparatus (144) (amplifier) and via an access path (310,310a) to a plurality of end unit apparatuses (311) connected thereto. The converter apparatus (403) connects to the access path and receives downstream second FDM signals directly from a central office (110) over an optical communication path (404) and sends the second FDM signals to at least one end unit apparatus (311) over the access path. The converter apparatus also receives upstream FDM signals from the at least one end unit apparatus over the access path and transmits the upstream FDM signals to the central office (110) over the optical path (405). In another embodiment, the converter apparatus connects directly to the primary path to provide service to an end user apparatus connected in a "tapped-bus" arrangement.

    Optical network based on remote interrogation of terminal equipment
    2.
    发明公开
    Optical network based on remote interrogation of terminal equipment 失效
    与终端和远程光网络单元的光网络，其波长变换

    公开(公告)号：EP0615358A1

    公开(公告)日：1994-09-14

    申请号：EP94301667.5

    申请日：1994-03-09

    申请人： AT&T Corp.

    发明人： Darcie, Thomas Edward ,  Frigo, N.J. ,  Magill, Peter D.

    IPC分类号： H04B10/24

    CPC分类号： H04J14/02 ,  H04B10/071 ,  H04B10/0771 ,  H04B10/2587 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0232 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282 ,  H04J14/0298 ,  H04J2014/0253

    摘要： A passive optical network architecture is disclosed for application in a local loop telephone environment. A local digital switch (10) transmits an optical signal bearing information downstream over an optical fiber (11) to the terminal equipment (90, 100) of a group of subscribers. This transmitted optical signal comprises light at a number of different wavelengths, i.e., it is a wavelength-division multiplexed signal, where each subscriber is associated with a particular wavelength of light. Each subscriber's terminal equipment detects that portion of the transmitted optical signal that exists at its assigned wavelength and thereby recovers the information sent by the local digital switch for that subscriber. However, a fraction of this detected optical signal is then remodulated (107, 115) by the subscriber's equipment with the subscriber's upstream information (123) and returned to the local digital switch. As a result, no optical sources are required in the subscriber equipment in this optical network architecture.

    摘要翻译： 一种无源光网络体系结构是盘在本地环路电话游离缺失环境应用。 本地数字交换机（10）发送到光信号承载的信息向下游通过光纤（11）到一组用户的终端设备（90，100）。 此反mitted光信号在多个不同的波长，即包括光，它是一个波分复用信号，其中，每个用户与光的特定波长相关联。 每个用户的终端设备检测所做的反式mitted光信号的部分没有存在于它的分配的波长，从而恢复由用于该订户的本地数字交换机发送的信息。 然而，该检测到的光信号的一小部分，然后通过该用户的与用户的上行信息（123）的设备重新调制（107，115），并返回到本地数字交换机。 其结果是，没有光源被要求在订户设备在该光网络架构。

    NxN single-mode optical waveguide coupler
    3.
    发明公开
    NxN single-mode optical waveguide coupler 失效
    NXN单模光波导耦合器

    公开(公告)号：EP0304213A3

    公开(公告)日：1990-07-04

    申请号：EP88307344.7

    申请日：1988-08-09

    申请人： AT&T Corp.

    发明人： Darcie, Thomas Edward ,  Saleh, Adel Abdel Moneim

    IPC分类号： G02B6/28 ,  G02F1/29 ,  H04Q3/52

    CPC分类号： G02F1/313 ,  G02B6/2804 ,  G02B6/2821

    摘要： The present invention relates to a NxN single-mode optical coupler (10, 26) employing evanescent wave coupling between mutually adjacent optical waveguides (11) sufficiently close to one another to facilitate coupling among all the waveguides. An optical signal of a narrow frequency band, e.g. appreciably less than 100 gigahertz, introduced to an input port (15i) of one of the waveguides is found to be nonuniformly distributed among the output ports (16) of the coupler. A first embodiment uses the nonuniform distributions of narrowband optical signals to the output ports of the coupler to enable the present invention to be used as essentially a selective switching device. A second embodiment introduces one or more predetermined broadband optical signals to one or more input ports of the coupler to produce an appreciably uniform power distribution among the output ports of the coupler. A third embodiment uses electrooptic or magnetooptic waveguides and the application of a high-frequency, continuously changing magnitude, oscillatory electric or magnetic field (17), respectively, throughout the coupling region of the waveguides to produce a substantially uniform power distribution among the output ports of the coupler for a narrowband optical signal applied to an input port of the coupler.

    摘要翻译： 本发明涉及一种在相互邻近的光波导（11）之间使用ev逝波耦合的NxN单模光耦合器（10,26），其彼此充分接近以便于所有波导之间的耦合。 窄频带的光信号，例如， 被发现导入到波导中的一个的输入端口（15i）的明显小于100千兆赫的发现在耦合器的输出端口（16）中不均匀地分布。 第一实施例使用窄带光信号的不均匀分布到耦合器的输出端口，以使本发明能够用作基本上选择性的开关装置。 第二实施例将一个或多个预定的宽带光信号引入耦合器的一个或多个输入端口，以在耦合器的输出端口之间产生明显均匀的功率分布。 第三实施例使用电光或磁光波导，并且在波导的整个耦合区域分别应用高频连续变化的振幅电场或磁场（17），以在输出端口之间产生基本均匀的功率分布 的耦合器，用于施加到耦合器的输入端口的窄带光信号。

    Network apparatus and method for providing two-way broadband communications
    6.
    发明公开
    Network apparatus and method for providing two-way broadband communications 失效
    Netzwerkvorrichtung und -verfahren zur Zweiwegbreitbandkommunikation

    公开(公告)号：EP0762766A2

    公开(公告)日：1997-03-12

    申请号：EP96303820.3

    申请日：1996-05-29

    申请人： AT&T Corp.

    发明人： Bodeep, George E. ,  Gnauck, Alan H. ,  Darcie, Thomas Edward ,  Lu, Xiaolin ,  Woodward, Sheryl Leigh

    IPC分类号： H04N7/173

    CPC分类号： H04N7/17309

    摘要： A converter apparatus (Mini Fiber Node MFN) (403) for use in a communication network (e.g., a coax network) includes a signal distribution unit (e.g., fiber node FN) (420) for transmitting frequency-division multiplexed communication signals downstream over a coax cable (141) to a node apparatus (144) (amplifier) and via an access path (310,310a) to a plurality of end unit apparatuses (311) connected thereto. The converter apparatus (403) connects to the access path and receives downstream second FDM signals directly from a central office (110) over an optical communication path (404) and sends the second FDM signals to at least one end unit apparatus (311) over the access path. The converter apparatus also receives upstream FDM signals from the at least one end unit apparatus over the access path and transmits the upstream FDM signals to the central office (110) over the optical path (405). In another embodiment, the converter apparatus connects directly to the primary path to provide service to an end user apparatus connected in a "tapped-bus" arrangement.

    摘要翻译： 在通信网络（例如，同轴电缆网络）中使用的转换器装置（微型光纤节点MFN）（403）包括信号分配单元（例如，光纤节点FN）（420），用于在下行发送频分复用的通信信号 同轴电缆（141）连接到节点装置（144）（放大器），并且经由与其连接的多个端部单元装置（310,310a）的访问路径（310,310a）。 转换器装置（403）连接到访问路径，并通过光通信路径（404）直接从中心局（110）接收下行的第二FDM信号，并将第二FDM信号发送到至少一个终端单元设备（311） 访问路径。 转换器装置还通过接入路径从至少一个终端单元设备接收上行FDM信号，并通过光路（405）将上行FDM信号发送到中心局（110）。 在另一实施例中，转换器装置直接连接到主路径，以向以“抽头总线”方式连接的终端用户装置提供服务。

    Guided wave communication system
    7.
    发明公开
    Guided wave communication system 失效
    指导波通信系统

    公开(公告)号：EP0234804A3

    公开(公告)日：1989-10-04

    申请号：EP87301166.2

    申请日：1987-02-11

    申请人： AT&T Corp.

    发明人： Darcie, Thomas Edward ,  Whalen, Matthew Stephen

    IPC分类号： H04B10/00 ,  H04J14/00

    CPC分类号： H04J14/08

    摘要： A guided wave communication system or network includes a head-end unit (15) which is coupled to one end of a bus-like wave guiding means (13, 16). Separate directional couplers (14,17) are disposed along the wave guiding means to couple lightwave or microwave signals either (a) into the bus-like wave guiding means (13) from separate transmitters (11), or (b) from a bus-like wave guiding means (16) to separate receivers (12). The directional couplers disposed along a guiding means each have a separate coupling coefficient which is optimized to only couple enough of the lightwave or microwave energy onto or from the associated guiding means so that either (a) the head-end unit receives a minimal signal power level from each transmitter or (b) the receivers receive a minimal signal power level from the head-end unit, respectively, to provide a predetermined bit error rate regardless of their distance from the head-end unit along the associated waveguiding means.

    An optical mixer for upconverting or downconverting an optical signal
    8.
    发明公开
    An optical mixer for upconverting or downconverting an optical signal 失效
    Optischer Mischer zumAufwärts-oderAbwärtsmischeneines optischen Signals。

    公开(公告)号：EP0263613A2

    公开(公告)日：1988-04-13

    申请号：EP87308323.2

    申请日：1987-09-21

    申请人： AT&T Corp.

    发明人： Darcie, Thomas Edward

    IPC分类号： H01S3/103 ,  H04B10/06 ,  G02F1/015 ,  G02F2/00

    CPC分类号： G02F2/002 ,  H01S5/0608 ,  H01S5/50 ,  H04B10/60

    摘要： The present invention relates to an optical upconverting or downconverting gain or loss modulating mixer and a receiver for subcarrier optical communication systems using the mixer. The optical mixer can be formed, for example, from an optical amplifier (10) including a semiconductor laser chip comprising p-n junction with an active region channel formed along the junction. An optical signal (L(t)) received from the communication system is directed into one end of the channel, and a combination of a D-C bias signal (25) and a local oscillator signal (27) is concurrently impressed on the chip to gain-modulate the received optical signal and produce an upconverted or downconverted output signal. In the receiver (11), the upconverted or downconverted output signal from the gain-modulated optical amplifier is detected by a photodetector (12), amplified if necessary, filtered and then demodulated before transmission to the output utilization device. A loss modulator (30) provides similar optical mixing but does not provide a gain to the output signal.

    摘要翻译： 本发明涉及一种光学上变频或下变频增益或损耗调制混频器以及使用混频器的子载波光通信系统的接收机。 光学混合器可以由例如包括半导体激光器芯片的光学放大器（10）形成，该半导体激光器芯片包括沿着该结形成的有源区通道的p-n结。 从通信系统接收的光信号（L（t））被引导到信道的一端，并且DC偏置信号（25）和本地振荡器信号（27）的组合同时印在芯片上以获得 调制接收到的光信号并产生上变频或下变频输出信号。 在接收机（11）中，来自增益调制光放大器的上变频或下变频的输出信号由光电检测器（12）检测，如有必要，被放大，滤波后再传输到输出利用装置进行解调。 丢失调制器（30）提供类似的光学混合，但不向输出信号提供增益。

    Method and system for providing low-cost high-speed data services
    10.
    发明公开
    Method and system for providing low-cost high-speed data services 失效
    Verfahren und Systemfürschnelle Datendienste mit geringen Kosten

    公开(公告)号：EP0831619A2

    公开(公告)日：1998-03-25

    申请号：EP97116403.3

    申请日：1997-09-19

    申请人： AT&T Corp.

    发明人： Darcie, Thomas Edward ,  Desai, Bhavesh ,  Gnauck, Alan H. ,  Lu, Xiaolin ,  Woodward, Sheryl Leigh

    IPC分类号： H04L12/28 ,  H04L12/413 ,  H04L12/403

    CPC分类号： H04L12/2801 ,  H04L12/403 ,  H04L12/413

    摘要： A communication network uses intermediate nodes to resolve local traffic contention. Intermediate nodes receive upstream signals from end users, derive traffic information signals from the upstream signals, and transmit the traffic information signals to end users. By listening to the traffic information signals from the intermediate node, the end users know whether the upstream transmission channels are idle or busy, or whether a collision has occurred. The intermediate nodes derive and transmit the traffic information signals with or without the assistance of the central office or head end.

    摘要翻译： 通信网络使用中间节点来解决本地流量争用。 中间节点接收终端用户的上行信号，从上游信号中导出交通信息信号，并向最终用户发送交通信息信号。 通过监听来自中间节点的交通信息信号，终端用户知道上行传输信道是空闲还是忙，还是发生了冲突。 中间节点在有或没有中心局或头端的协助下导出和发送交通信息信号。