公开(公告)号：US07660528B2

公开(公告)日：2010-02-09

申请号：US11431342

申请日：2006-05-09

申请人： Ryan E. Hirth ,  Lowell D. Lamb ,  Glen Kramer ,  Benjamin J. Brown

发明人： Ryan E. Hirth ,  Lowell D. Lamb ,  Glen Kramer ,  Benjamin J. Brown

IPC分类号： H04J14/02 ,  H04B10/24

CPC分类号： H04J14/0226 ,  H04B10/2537 ,  H04B10/27 ,  H04B10/272 ,  H04J14/02 ,  H04J14/0227 ,  H04J14/0232 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283

摘要： One embodiment of the present invention provides a system for mitigating Raman crosstalk between downstream data and video transmission in an Ethernet passive optical network (EPON), wherein the EPON includes an optical line terminal (OLT) and one or more optical network units (ONU's). During operation, the system transmits a data stream from the OLT to the ONU's on a first wavelength that is substantially at 1490 nm. The system also transmits a video signal stream from the OLT to the ONU's on a second wavelength that is substantially at 1550 nm. The system modifies the bit sequence for the data stream to change the power spectral distribution (PSD) for the data stream, thereby reducing power spectral content in the frequency range where significant Raman crosstalk can occur between data and video signal streams.

摘要翻译： 本发明的一个实施例提供了一种用于减轻以太网无源光网络（EPON）中的下行数据和视频传输之间的拉曼串扰的系统，其中EPON包括光线路终端（OLT）和一个或多个光网络单元（ONU） 。 在运行期间，系统以基本上为1490nm的第一波长从OLT向ONU发送数据流。 该系统还将基于1550nm的第二波长的视频信号流从OLT发送到ONU。 该系统修改数据流的比特序列以改变数据流的功率谱分布（PSD），从而降低在数据和视频信号流之间可能出现显着的拉曼串扰的频率范围内的功率谱含量。

公开(公告)号：US07525982B2

公开(公告)日：2009-04-28

申请号：US11228879

申请日：2005-09-16

申请人： Glen Kramer ,  Edward W. Boyd ,  Ryan E. Hirth ,  Lawrence D. Davis ,  Lowell D. Lamb

发明人： Glen Kramer ,  Edward W. Boyd ,  Ryan E. Hirth ,  Lawrence D. Davis ,  Lowell D. Lamb

IPC分类号： H04L12/28

CPC分类号： H04J3/0652

摘要： One embodiment of the present invention provides a method for facilitating asymmetric line rates in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node. During operation, the system provides a downstream code-group clock, wherein each cycle thereof corresponds to a code group transmitted from the central node to a remote node. The system also provides an upstream code-group clock, wherein each cycle thereof corresponds to a code group received at the central node from a remote node. In addition, the system provides a multi-point control protocol (MPCP) clock, wherein the frequency ratio of the MPCP clock to the downstream code-group clock is different from the frequency ratio of the MPCP clock to the upstream code-group clock, thereby allowing the downstream transmission to be performed at a faster line rate than the upstream transmission line rate.

摘要翻译： 本发明的一个实施例提供一种用于促进包括中央节点和至少一个远程节点的以太网无源光网络（EPON）中的非对称线路速率的方法。 在操作期间，系统提供下游代码组时钟，其中每个周期对应于从中央节点发送到远程节点的代码组。 该系统还提供上行代码组时钟，其中每个周期对应于从远程节点在中央节点接收的代码组。 另外，该系统提供多点控制协议（MPCP）时钟，其中MPCP时钟与下游码组时钟的频率比不同于MPCP时钟与上行代码组时钟的频率比， 从而允许以比上行传输线路速率更快的线路速率执行下游传输。

公开(公告)号：US20130322869A1

公开(公告)日：2013-12-05

申请号：US13483944

申请日：2012-05-30

申请人： Ryan E. HIRTH ,  Lowell D. Lamb

发明人： Ryan E. HIRTH ,  Lowell D. Lamb

IPC分类号： H04B10/08

CPC分类号： H04B10/071 ,  H04B10/0771 ,  H04Q11/0067 ,  H04Q2011/0083 ,  H04Q2011/0086

摘要： In a first aspect, the method and apparatus of the present disclosure can be used to periodically and/or intermittently place one or more ONUs attached to a PON in a power savings mode so that an OTDR test can be performed. While in the power savings mode, the ONUs temporarily suspend their transmitter function and power down their upstream lasers. In a second aspect, the method and apparatus of the present disclosure can be used to coordinate the performance of OTDR during one or more periodic or intermittent discovery slots used to detect and register ONUs recently connected to the PON. Because new ONUs are infrequently connected to the PON and ONUs already registered are not permitted to transmit during the discovery windows, OTDR can be performed during these windows without impacting, to a great degree, the normal operation of the PON.

摘要翻译： 在第一方面，本公开的方法和装置可以用于周期性地和/或间歇地将附接到PON的一个或多个ONU放置在省电模式中，使得可以执行OTDR测试。 在省电模式下，ONU暂时中止其发射机功能并关闭其上行激光器。 在第二方面，本公开的方法和装置可以用于在用于检测和注册最近连接到PON的ONU的一个或多个周期性或间歇发现时隙期间协调OTDR的性能。 由于新的ONU不频繁地连接到PON，并且在发现窗口期间不允许发送已经注册的ONU，所以在这些窗口中可以执行OTDR，而在很大程度上不影响PON的正常操作。

公开(公告)号：US08913887B2

公开(公告)日：2014-12-16

申请号：US13483944

申请日：2012-05-30

申请人： Ryan E. Hirth ,  Lowell D. Lamb

发明人： Ryan E. Hirth ,  Lowell D. Lamb

IPC分类号： H04B10/08

CPC分类号： H04B10/071 ,  H04B10/0771 ,  H04Q11/0067 ,  H04Q2011/0083 ,  H04Q2011/0086

摘要： In a first aspect, the method and apparatus of the present disclosure can be used to periodically and/or intermittently place one or more ONUs attached to a PON in a power savings mode so that an OTDR test can be performed. While in the power savings mode, the ONUs temporarily suspend their transmitter function and power down their upstream lasers. In a second aspect, the method and apparatus of the present disclosure can be used to coordinate the performance of OTDR during one or more periodic or intermittent discovery slots used to detect and register ONUs recently connected to the PON. Because new ONUs are infrequently connected to the PON and ONUs already registered are not permitted to transmit during the discovery windows, OTDR can be performed during these windows without impacting, to a great degree, the normal operation of the PON.

摘要翻译： 在第一方面，本公开的方法和装置可以用于周期性地和/或间歇地将附接到PON的一个或多个ONU放置在省电模式中，使得可以执行OTDR测试。 在省电模式下，ONU暂时中止其发射机功能并关闭其上行激光器。 在第二方面，本公开的方法和装置可以用于在用于检测和注册最近连接到PON的ONU的一个或多个周期性或间歇发现时隙期间协调OTDR的性能。 由于新的ONU不频繁地连接到PON，并且在发现窗口期间不允许发送已经注册的ONU，所以在这些窗口中可以执行OTDR，而在很大程度上不影响PON的正常操作。

公开(公告)号：US5698140A

公开(公告)日：1997-12-16

申请号：US640540

申请日：1996-05-02

申请人： Lowell D. Lamb ,  Donald R. Huffman

发明人： Lowell D. Lamb ,  Donald R. Huffman

IPC分类号： B01J21/18 ,  C01B3/00 ,  H01G9/00 ,  H01G9/155 ,  H01M4/00 ,  H01M4/36 ,  H01B1/04 ,  C01B31/00

CPC分类号： H01G9/155 ,  B01J21/18 ,  C01B3/0078 ,  H01M4/00 ,  H01M4/36 ,  Y02E60/13 ,  Y02E60/325 ,  Y10S423/40 ,  Y10S977/735 ,  Y10S977/779 ,  Y10S977/781 ,  Y10S977/835 ,  Y10S977/902 ,  Y10S977/943 ,  Y10T428/249954 ,  Y10T428/249986 ,  Y10T428/249987

摘要： A hybrid material comprising an extremely porous, carbon-bearing substrate, such as a carbon-bearing aerogel, and fullerene molecules loaded in the pores of the substrate. The hybrid compound is obtained by several approaches, including chemical vapor infiltration of fullerenes into finished carbon-containing aerogels; infiltration of fullerenes during the solvent displacement step of aerogel preparation; and addition of fullerenes to solgel starting materials.

摘要翻译： 一种混合材料，其包含极其多孔的含碳衬底，例如含碳气凝胶和负载在衬底的孔中的富勒烯分子。 杂化化合物通过几种方法获得，包括将富勒烯化学蒸气渗入成品含碳气凝胶中; 气溶胶置换步骤期间富勒烯渗透; 并将富勒烯加入到solgel起始原料中。