公开(公告)号：US06999654B1

公开(公告)日：2006-02-14

申请号：US10089112

申请日：2000-09-27

申请人： Lars Egnell ,  Bengt Johansson ,  Fredrik Liden ,  Fredrik Lindgren ,  Dag Bonnedal ,  Ola Hulten

发明人： Lars Egnell ,  Bengt Johansson ,  Fredrik Liden ,  Fredrik Lindgren ,  Dag Bonnedal ,  Ola Hulten

IPC分类号： G02B6/28 ,  H04J14/02

CPC分类号： G02B6/4454 ,  H04J14/0201 ,  H04J14/0219

摘要： An add/drop node of an optical WDN-network which has two fiber paths for light of a plurality of channels propagating in opposite directions comprises two add/drop modules (231, 23r) for each of the channels. All the modules are identically constructed. Each module comprises an add device (251, 25r) for adding light to one of the paths and a drop device (27r, 271) for deflecting a portion of light from a second one of the paths. A module comprises a house (41) enclosing the add device and the drop device. A first fixed connector (53, 73) is attached to the house for connection in the first path and to a an optical fiber (45, 65) which extends freely from the house and has a first free connector (43, 63) at its free end to be attached to the fixed connector of a neighboring add/drop module for continuing the first path through the considered add/drop module to the neighboring module. In the same way a second fixed connector is attached to the house for connection in the second path and to a second optical fiber which extends freely from the house and has a second free connector at its free end to be attached to the fixed second connector of a neighboring add/drop module for continuing the second path through the considered add/drop module to the neighboring module.

摘要翻译： 具有用于在相反方向上传播的多个信道的光的两个光纤路径的光学WDN网络的添加/分出节点包括用于每个信道的两个添加/分出模块（231,23r）。 所有的模块都是相同的。 每个模块包括用于向一个路径添加光的添加设备（251,25r）和用于偏转来自第二个路径的光的一部分的液滴装置（27 r，271）。 模块包括封闭加法装置和落下装置的房屋（41）。 第一固定连接器（53,73）附接到房屋，用于在第一路径中连接，并且连接到从房屋自由延伸的光纤（45,65），并且在其上具有第一自由连接器（43,63） 自由端连接到相邻分插模块的固定连接器，用于将通过所考虑的分插模块的第一路径继续到相邻模块。 以相同的方式，第二固定连接器附接到房屋，用于在第二路径中连接，并且连接到从房屋自由延伸的第二光纤，并且在其自由端具有第二自由连接器以附接到固定的第二连接器 相邻的添加/分出模块，用于将通过所考虑的添加/删除模块的第二路径继续到相邻模块。

公开(公告)号：US20060018593A1

公开(公告)日：2006-01-26

申请号：US10089112

申请日：2000-09-27

申请人： Lars Egnell ,  Bengt Johansson ,  Frederik Liden ,  Fredrik Lindgren ,  Dag Bonnedal ,  Ola Hulten

发明人： Lars Egnell ,  Bengt Johansson ,  Frederik Liden ,  Fredrik Lindgren ,  Dag Bonnedal ,  Ola Hulten

IPC分类号： G02B6/28

CPC分类号： G02B6/4454 ,  H04J14/0201 ,  H04J14/0219

摘要： An add/drop node of an optical WDN-network which has two fiber paths for light of a plurality of channels propagating in opposite directions comprises two add/drop modules (231, 23r) for each of the channels. All the modules are identically constructed. Each module comprises an add device (251, 25r) for adding light to one of the paths and a drop device (27r, 271) for deflecting a portion of light from a second one of the paths. A module comprises a house (41) enclosing the add device and the drop device. A first fixed connector (53, 73) is attached to the house for connection in the first path and to a an optical fiber (45, 65) which extends freely from the house and has a first free connector (43, 63) at its free end to be attached to the fixed connector of a neighbouring add/drop module for continuing the first path through the considered add/drop module to the neighbouring module. In the same way a second fixed connector is attached to the house for connection in the second path and to a second optical fiber which extends freely from the house and has a second free connector at its free end to be attached to the fixed second connector of a neighbouring add/drop module for continuing the second path through the considered add/drop module to the neighbouring module.

摘要翻译： 具有用于在相反方向上传播的多个信道的光的两个光纤路径的光学WDN网络的添加/分出节点包括用于每个信道的两个添加/分出模块（231,23r）。 所有的模块都是相同的。 每个模块包括用于向一个路径添加光的添加设备（251,25r）和用于偏转来自第二个路径的光的一部分的液滴装置（27 r，271）。 模块包括封闭加法装置和落下装置的房屋（41）。 第一固定连接器（53,73）附接到房屋，用于在第一路径中连接，并且连接到从房屋自由延伸的光纤（45,65），并且在其上具有第一自由连接器（43,63） 自由端连接到相邻分插模块的固定连接器，用于将通过所考虑的分插模块的第一路径继续到相邻模块。 以相同的方式，第二固定连接器附接到房屋，用于在第二路径中连接，并且连接到从房屋自由延伸的第二光纤，并且在其自由端具有第二自由连接器以附接到固定的第二连接器 相邻的添加/分出模块，用于将通过所考虑的添加/删除模块的第二路径继续到相邻模块。

公开(公告)号：US06684005B1

公开(公告)日：2004-01-27

申请号：US09631102

申请日：2000-08-01

申请人： Lars Egnell ,  Bengt Johansson ,  Fredrik Linden ,  Fredrik Lindgren ,  Dag Bonnedal ,  Ola Hulten

发明人： Lars Egnell ,  Bengt Johansson ,  Fredrik Linden ,  Fredrik Lindgren ,  Dag Bonnedal ,  Ola Hulten

IPC分类号： G02B628

CPC分类号： G02B6/4454 ,  H04J14/0201 ,  H04J14/0219

摘要： An add/drop node used in an optical network having two fiber paths for carrying light corresponding to a plurality of channels in opposite directions may include a pair of add/drop modules that correspond to one of the plurality of channels. This arrangement advantageously provides a simple approach for connecting the components of an add/drop node.

摘要翻译： 在具有两个光纤路径的光网络中使用的用于承载相反方向上的多个信道的光的添加/分出节点可以包括对应于多个信道中的一个信道的一对添加/分出模块。 这种安排有利地提供了用于连接添加/分出节点的组件的简单方法。

公开(公告)号：US06731597B1

公开(公告)日：2004-05-04

申请号：US09462414

申请日：2000-04-28

申请人： Robert Batchellor ,  Lars Egnell ,  Bengt Johansson

发明人： Robert Batchellor ,  Lars Egnell ,  Bengt Johansson

IPC分类号： H04L100

CPC分类号： H04J14/0293 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283 ,  H04J14/0286 ,  H04J14/0289 ,  H04J14/0297 ,  H04L12/4637

摘要： A system and a method for maintaining operation of a signaling interconnection between a first ring network and a separate second ring network. Each ring network comprises two communication paths transmitting data in opposite directions and at least two nodes connected to both communication paths. The networks are interconnected via two adjacent gateways, which receive data from the two communication paths on one network, and transmit the data onto the other network directed away from the other gateway. Data traffic is stopped in both directions in an inactive segment on each ring network, so that a node situated on a ring network receives traffic from only one of the two gateways.

摘要翻译： 一种用于维持第一环网和单独的第二环网之间的信令互连操作的系统和方法。 每个环网包括两个通信路径，它们在相反方向上发送数据，并且至少两个节点连接到两个通信路径。 网络通过两个相邻的网关相互连接，这些网关从一个网络上的两个通信路径接收数据，并将数据发送到远离另一个网关的另一个网络上。 数据业务在每个环网上的非活动段中在两个方向上停止，使得位于环网上的节点仅从两个网关之一接收业务。

公开(公告)号：US06590681B1

公开(公告)日：2003-07-08

申请号：US09328385

申请日：1999-06-09

申请人： Lars Egnell ,  Bengt Johansson ,  Robert Batchellor ,  Nigel Wood ,  Magnus Öberg

发明人： Lars Egnell ,  Bengt Johansson ,  Robert Batchellor ,  Nigel Wood ,  Magnus Öberg

IPC分类号： H04J1402

CPC分类号： H04Q11/0062 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0283 ,  H04J14/0295 ,  H04Q11/0005 ,  H04Q2011/0009 ,  H04Q2011/0016 ,  H04Q2011/0075 ,  H04Q2011/0081

摘要： An optical fiber network of WDM type comprises two fibers which carry light signals propagating in opposite directions and which are arranged in a ring configuration. One standby link between two neighboring nodes is inactive but is made active if an active link fails. An add and drop node used in the network has band blocking filters connected in a fiber between a drop coupler and an add coupler, taking out a share of the light power in each direction to be received through bandpass filters in receivers and adding new wavelength channels produced in transmitters, respectively. Switches are used for receiving and transmitting on the wavelength channels in correct directions. The positions of the switches can be changed when the inactive link has to become one of the two active links directly connected to the node. A very efficient use of the wavelength channels in the network can then be achieved for nodes having a minimum of in-line components, and particularly, a minimum of in-line filtering components.

摘要翻译： WDM型光纤网络包括两个光纤，其携带沿相反方向传播的光信号，其布置成环形结构。 两个相邻节点之间的一个备用链路处于非活动状态，但如果主动链路发生故障，则其将被激活。 在网络中使用的添加和分出节点具有连接在光耦合器和加法耦合器之间的光纤中的带阻滤波器，在接收机中通过带通滤波器在每个方向上取出光功率的份额并添加新的波长信道 分别在发射机中产生。 开关用于在正确的方向上在波长通道上进行接收和发送。 当非活动链路必须成为直接连接到节点的两个活动链路之一时，可以改变交换机的位置。 然后可以对具有最小的在线组件的特别是最小的在线过滤组件的节点实现网络中波长信道的非常有效的使用。

公开(公告)号：US07016609B2

公开(公告)日：2006-03-21

申请号：US10462087

申请日：2003-06-12

申请人： Lars Egnell

发明人： Lars Egnell

IPC分类号： H04J14/02

CPC分类号： H04J14/0294 ,  H04B10/27 ,  H04B10/275 ,  H04J14/0201 ,  H04J14/0212 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283

摘要： A receiver transponder that is implemented in an optical add/drop multiplexer (OADM) is disclosed. The OADM is used in short haul type networks and receives light signals from two opposite directions on input fibers (21, 23). The optical input signals are converted to electrical signals by optical-to-electrical (O/E) converters (51, 53). The output terminals of the converters are connected to an electronic switch (61), which provides protection switching in a protected ring type network. The output signal of the switch can be monitored (65) before the signal enters a reshaping circuit (67), where the signal is reshaped, filtered from a supervisory channel, and adjusted to a proper drive level for a laser (69). The optical signal from the laser can travel a significant distance through a fiber (71) to a client receiver or sustain other forms of attenuation and still have sufficient signal power for reliable detection. An electrical output signal can be provided (73) by the reshaping circuit. The converters can be used to protect for one another and to detect channel signal power and a supervisory channel at electric outputs (57, 59). The laser can be a low cost type since the laser is typically used for transmitting light over only moderate distances. The electric high frequency switch is generally more reliable and can be more easily monitored than a purely optical switch.

摘要翻译： 公开了一种在光分插复用器（OADM）中实现的接收机转发器。 OADM用于短距离类型的网络，并且在输入光纤（21,23）上从两个相反的方向接收光信号。 光输入信号通过光电（O / E）转换器（51,53）转换成电信号。 转换器的输出端子连接到电子开关（61），其提供保护环型网络中的保护切换。 在信号进入整形电路（67）之前，可以监控开关的输出信号（65），信号重新整形，从监控通道滤波，并调整到激光器的适当驱动电平（69）。 来自激光器的光信号可以通过光纤（71）传输到客户接收机或维持其他形式的衰减，并且仍然具有足够的信号功率用于可靠的检测。 可以由整形电路（73）提供电输出信号（73）。 转换器可用于彼此保护并检测通道信号功率和电气输出端的监控通道（57,59）。 激光器可以是低成本类型，因为激光器通常用于仅在中等距离上传输光。 电高频开关通常比纯光开关更可靠，更容易监测。

公开(公告)号：US07327960B1

公开(公告)日：2008-02-05

申请号：US09936961

申请日：2000-03-20

申请人： Lars Egnell

发明人： Lars Egnell

IPC分类号： H04B10/00

CPC分类号： H04J14/0294 ,  H04B10/27 ,  H04B10/275 ,  H04J14/0201 ,  H04J14/0212 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283

摘要： A receiver transponder to be used in an optical add and drop multiplexer connected in short haul type networks receives light signals from two opposite directions on input fibers (21, 23). The optical input signals are converted to electrical signals by O/E converters (51, 53). The output terminals of the converters are connected to an electronic switch (61) which handles protection switching in a protected ring type network. The output of the switch can be monitored (65) before, it enters a reshaping circuit (67) in which the signal is reshaped, cleansed from a supervisory channel and given a proper drive level for a following laser (69). The optical signal from the laser can travel a significant distance through a fiber (71) to a client receiver or sustain other forms of attenuation and still have a sufficient signal power for reliable detection. An electrical output signal can be provided (73) by the reshaping circuit. The converters can be used to protect for one another and to detect channel signal power and a supervisory channel at electric outputs (57, 59). The laser can be a low cost type since the laser is typically used for transmitting light over only moderate distances and the input signal is amplified and reshaped. The electric high frequency switch is generally more reliable and can be more easily monitored than a purely optical switch.

摘要翻译： 用于在短距离网络中连接的光分插复用器中的接收机应答器从输入光纤（21,23）上的两个相反方向接收光信号。 光输入信号由O / E转换器（51,53）转换成电信号。 转换器的输出端子连接到电子开关（61），其处理受保护的环型网络中的保护切换。 开关的输出可以在之前被监视（65），它进入重新整形电路（67），信号被重新整形，从监控通道中清洗并为下一个激光器给出适当的驱动电平（69）。 来自激光器的光信号可以通过光纤（71）传输到客户接收机，或维持其他形式的衰减，并且仍然具有足够的信号功率以进行可靠的检测。 可以由整形电路（73）提供电输出信号（73）。 转换器可用于彼此保护并检测通道信号功率和电气输出端的监控通道（57,59）。 激光器可以是低成本类型，因为激光器通常用于仅在中等距离上传输光，并且输入信号被放大和重新形成。 电高频开关通常比纯光开关更可靠，更容易监测。

公开(公告)号：US06525852B1

公开(公告)日：2003-02-25

申请号：US09328383

申请日：1999-06-09

申请人： Lars Egnell

发明人： Lars Egnell

IPC分类号： H04J1402

CPC分类号： H04J14/0283 ,  H04B10/275 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/0289 ,  H04Q2011/0083 ,  H04Q2011/0092

摘要： An optical fiber network of WDM type comprises two fibers which carry light signals propagating in opposite direction and which are arranged in a ring configuration. In the ring, one standby link between two neighboring nodes is used if another link fails. An add and drop node, used in the network only for traffic between neighboring nodes, has band blocking filters connected in respective fibers between a drop coupler and an add coupler. A drop coupler takes out equal shares of the light power to be received through simple switches and bandpass filters in receivers. An add coupler adds new wavelength channels produced in transmitters in the node through multiplexers and simple switches. The switches are used for receiving and transmitting on the wavelength channels in correct directions depending on the location of the inactive link. Thus, the positions of two of the switches have to be changed when the inactive link is one of the two links directly connected to the node. Such a node has a minimun of in-line components, and particulary, a minimum of in-line filtering components.

摘要翻译： WDM型光纤网络包括两个光纤，其携带相反方向传播的光信号，并以环形配置。 在环中，如果另一个链路发生故障，则使用两个相邻节点之间的一个备用链路。 在网络中仅用于相邻节点之间的业务的添加和删除节点在分离耦合器和添加耦合器之间的相应光纤中连接带阻滤波器。 分接耦合器通过接收器中的简单开关和带通滤波器获得待接收的光功率的相等份额。 添加耦合器通过多路复用器和简单的开关在节点中增加发射机中产生的新波长信道。 根据不活动链路的位置，这些开关用于以正确的方向在波长信道上进行接收和发送。 因此，当非活动链路是直接连接到节点的两个链路中的一个时，必须改变两个交换机的位置。 这样的节点具有最小的在线组件，特别是最小的在线过滤组件。

公开(公告)号：US06639703B1

公开(公告)日：2003-10-28

申请号：US09637027

申请日：2000-08-14

申请人： Lars Egnell

发明人： Lars Egnell

IPC分类号： H04B1002

CPC分类号： H04J14/0294 ,  H04B10/27 ,  H04B10/275 ,  H04J14/0201 ,  H04J14/0212 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283

摘要： A receiver transponder that is implemented in an optical add/drop multiplexer (OADM) is disclosed. The OADM is used in short haul type networks and receives light signals from two opposite directions on input fibers (21, 23). The optical input signals are converted to electrical signals by optical-to-electrical (O/E) converters (51, 53). The output terminals of the converters are connected to an electronic switch (61), which provides protection switching in a protected ring type network. The output signal of the switch can be monitored (65) before the signal enters a reshaping circuit (67), where the signal is reshaped, filtered from a supervisory channel, and adjusted to a proper drive level for a laser (69). The optical signal from the laser can travel a significant distance through a fiber (71) to a client receiver or sustain other forms of attenuation and still have sufficient signal power for reliable detection. An electrical output signal can be provided (73) by the reshaping circuit. The converters can be used to protect for one another and to detect channel signal power and a supervisory channel at electric outputs (57, 59). The laser can be a low cost type since the laser is typically used for transmitting light over only moderate distances. The electric high frequency switch is generally more reliable and can be more easily monitored than a purely optical switch.

摘要翻译： 公开了一种在光分插复用器（OADM）中实现的接收机转发器。 OADM用于短距离类型的网络，并且在输入光纤（21,23）上从两个相反的方向接收光信号。 光输入信号通过光电（O / E）转换器（51,53）转换成电信号。 转换器的输出端子连接到电子开关（61），其提供保护环型网络中的保护切换。 在信号进入整形电路（67）之前，可以监控开关的输出信号（65），信号重新整形，从监控通道滤波，并调整到激光器的适当驱动电平（69）。 来自激光器的光信号可以通过光纤（71）传输到客户接收机或维持其他形式的衰减，并且仍然具有足够的信号功率用于可靠的检测。 可以由整形电路（73）提供电输出信号（73）。 转换器可用于彼此保护并检测通道信号功率和电气输出端的监控通道（57,59）。 激光器可以是低成本类型，因为激光器通常用于仅在中等距离上传输光。 电高频开关通常比纯光开关更可靠，更容易监测。

公开(公告)号：US06574192B1

公开(公告)日：2003-06-03

申请号：US09333650

申请日：1999-06-16

申请人： Lars Egnell

发明人： Lars Egnell

IPC分类号： G01R3108

CPC分类号： H04L12/413 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/021 ,  H04J14/0217 ,  H04J14/0283 ,  H04J14/0291 ,  H04L12/42 ,  H04L69/40

摘要： A communications network comprising at least two nodes is disclosed. The network has two communication paths that carry traffic in opposite directions and work as a bi-directional bus. The network has a first inactive segment that carries no traffic and is arranged to allow the first inactive segment to be made active and another segment to be made inactive, especially in the case of fault in the other segment. The activation and inactivation logically “move” the first inactive segment. Additional protection paths are provided between the nodes.

摘要翻译： 公开了包括至少两个节点的通信网络。 该网络具有两个通信路径，以相反方向携带业务，并作为双向总线工作。 网络具有不具有业务的第一非活动段，并且被布置为允许第一非活动段被激活并且另一段被使得不活动，特别是在另一段中的故障的情况下。 激活和失活逻辑上“移动”第一个非活动段。 在节点之间提供额外的保护路径。