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1. 发明授权

US06915075B1 Protection of WDM-channels 有权
标题翻译：保护WDM通道
公开(公告)号：US06915075B1
公开(公告)日：2005-07-05
申请号：US09643993
申请日：2000-08-23
申请人： Magnus Öberg , Nigel Robert Wood , Jonas Hemgren
发明人： Magnus Öberg , Nigel Robert Wood , Jonas Hemgren
IPC分类号： H04J14/02 , H04B10/18 , H04J14/00
CPC分类号： H04J14/0297 , H04J14/0279 , H04J14/0293
摘要： An optical network comprises a bidirectional link connecting two nodes (1) through two optical fibers (3). Optical output signals from optical transmitters (7) in a node are provided to transponders (11) issuing optical signals of well-defined wavelengths to a power combiner (13), from which optical signals are forwarded to the other node on the respective fiber. The network can have protection for failures of various components. Thus, a spare transponder (21) can receive the optical output signals of an optical transmitter (7) in the case of a failure of an ordinary transponder (11). The spare transponder (21) is also connected to the combiner (13). The optical transmitters (7) and receivers (9) can be duplicated by providing spare transmitters (7′) and spare receivers (9′). Various arrangements can be used for connecting the output of a transmitter to an ordinary transponder or the spare transponder. For example, cross-bar switches (17, 19) can be arranged at the outputs of a pair of an ordinary transmitter and a spare transmitter and at the inputs of a pair of an ordinary receiver and a spare receiver. For a node having N−1 ordinary transmitters a N:1 switch (23) is then arranged at the input of the spare transponder (21).
摘要翻译：光网络包括通过两个光纤（3）连接两个节点（1）的双向链路。一个节点中的光发射机（7）的光输出信号被提供给转发器（11）向功率组合器（13）发出明确定义的波长的光信号，光信号从该光信号转发到相应光纤上的另一个节点。网络可以保护各种组件的故障。因此，在普通应答器（11）发生故障的情况下，备用转发器（21）可以接收光发送器（7）的光输出信号。备用应答器（21）也连接到组合器（13）。可以通过提供备用发射机（7'）和备用接收机（9'）来复制光发射机（7）和接收机（9）。可以使用各种布置来将发射机的输出连接到普通的应答器或备用发射机应答器。例如，横杆开关（17,19）可以布置在一对普通发射机和备用发射机的输出端以及一对普通接收机和备用接收机的输入端。对于具有N-1个普通发射机的节点，N：1交换机（23）然后被布置在备用发射机应答器（21）的输入端。

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