公开(公告)号：US06421150B2

公开(公告)日：2002-07-16

申请号：US09756739

申请日：2001-01-10

申请人： Alan Frank Graves ,  Todd Douglas Morris ,  Donald Russell Ellis

发明人： Alan Frank Graves ,  Todd Douglas Morris ,  Donald Russell Ellis

IPC分类号： H04J1400

CPC分类号： H04Q11/0478 ,  H04L2012/5605 ,  H04L2012/567 ,  H04Q11/0062 ,  H04Q11/0067 ,  H04Q11/0071 ,  Y10S370/907

摘要： An improved access system for use in a Fiber-In-The-Loop (FITL) communications network is disclosed. The access system comprises a host digital terminal (HDT) and a plurality of subtending optical network units (ONUs). The digital signal processing (DSP) functions traditionally executed by line interface units (LIUs) within the ONUs are migrated to the HDT, rendering the individual ONUs simpler, cheaper and more reliable. This is made possible by the provision in each ONU of an oversampling codec for sampling (and conversion) of upstream and downstream data at a very high bit rate. The large bandwidths of the data communicated between the ONUs and the HDT are easily handled by the fiber optic medium therebetween.

公开(公告)号：US06400477B1

公开(公告)日：2002-06-04

申请号：US08929214

申请日：1997-09-09

申请人： Glenn Wellbrook

发明人： Glenn Wellbrook

IPC分类号： H04J1400

CPC分类号： H04Q11/0062 ,  H04J14/0279 ,  H04J14/0295 ,  H04J14/0297 ,  H04Q2011/0039 ,  H04Q2011/0081

摘要： An optical network includes a first optical cross-connect with a plurality of input ports and a plurality of output ports and a plurality of working channel optical transmitters and a second optical cross-connect with a plurality of input ports and a plurality of output ports and a plurality of working channel optical receivers. The first and second optical cross-connects are interconnected by a primary route and a secondary route. The network includes a protection channel optical transmitter and a protection channel optical receiver. The protection channel transmitter and receiver are adapted to transmit and receive signals in the event of a working channel transmitter or receiver failure.

摘要翻译： 光网络包括与多个输入端口和多个输出端口和多个工作信道光发射机的第一光交叉连接和与多个输入端口和多个输出端口的第二光交叉连接，以及 多个工作通道光接收器。 第一和第二光交叉连接通过主路由和辅路径相互连接。 网络包括保护信道光发射机和保护信道光接收机。 保护信道发射机和接收机适用于在工作信道发射机或接收机故障的情况下发送和接收信号。

公开(公告)号：US06331906B1

公开(公告)日：2001-12-18

申请号：US09408002

申请日：1999-09-29

申请人： Rohit Sharma ,  Larry R. McAdams

发明人： Rohit Sharma ,  Larry R. McAdams

IPC分类号： H04J1400

CPC分类号： H04Q11/0478 ,  H04J14/0212 ,  H04J14/0217 ,  H04J14/022 ,  H04J14/0283 ,  H04J14/0291 ,  H04J14/0297 ,  H04Q11/0001 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q11/0071 ,  H04Q2011/0049 ,  H04Q2011/0081 ,  H04Q2011/0092

摘要： Techniques for providing normal operation and service restoration capability in the event of failure of terminal equipment or transmission media in a heterogeneous network, such as a hybrid network containing single- and multi-wavelength lightwave communications systems. An optical switching node (OSN) is placed at each node in the ring network to provide the required connections between various fibers and terminal equipment, but having switch states that allow signals on the protection fibers to bypass the terminal equipment at that node. Ring-switched signals propagate around the ring on protection fibers without encountering the terminal equipment at the intervening nodes. To the extent that the protection fiber links between any given pair of nodes are incapable of supporting all the relevant communication regimes, such links are modified to provide such support.

摘要翻译： 在诸如包含单波长和多波长光波通信系统的混合网络的异构网络中的终端设备或传输介质故障的情况下提供正常操作和服务恢复能力的技术。 光交换节点（OSN）被放置在环形网络中的每个节点处，以提供各种光纤和终端设备之间所需的连接，但具有允许保护光纤上的信号绕过该节点处的终端设备的开关状态。 环形信号在保护光纤上环绕传播环绕，而不会在中间节点处遇到终端设备。 在任何给定的节点对之间的保护光纤链接不能支持所有相关通信方式的情况下，修改这些链路以提供这种支持。

公开(公告)号：US06330089B1

公开(公告)日：2001-12-11

申请号：US09170213

申请日：1998-10-13

申请人： Hiromi Yamada

发明人： Hiromi Yamada

IPC分类号： H04J1400

CPC分类号： H04J14/08 ,  H04B10/516

摘要： An optical time-division multiplexing transmitter module which includes an optical circulator, an optical coupler which splits in two an optical signal in the form of a pulse beam output from the circulator, first and second double-pass electro-absorption (DPEA) modulators positioned respectively to receive and modulate one and the other of the two split signals, and reflect the modulated signals back through the coupler to the circulator. The coupler multiplexes the reflected signals and directs the multiplexed signals to the circulator which then guides them to exit through a circulator output port. An optical delay circuit is positioned between in the path of one of the split signals so as to delay it relative to the other.

摘要翻译： 一种光时分复用发射机模块，其包括光循环器，以循环器输出的脉冲光束形式分成两个光信号的光耦合器，第一和第二双通电吸收（DPEA）调制器定位 分别接收和调制两个分离信号中的一个和另一个，并通过耦合器将调制信号反射回循环器。 耦合器复用反射信号并将多路复用的信号引导到循环器，循环器然后引导它们通过循环器输出端口退出。 光延迟电路位于分离信号之一的路径之间，以便相对于另一个延迟。