Abstract:
The present document relates to optical transmission systems. In particular, the present document relates to optical submarine transmission systems. A branching unit (210) for an optical transmission system (200) is described. The branching unit (210) comprises a first and a second input port configured to be coupled to a first and a second incoming fiber (320, 321), respectively; a first output port configured to be coupled to a first outgoing fiber (322); wherein the second incoming fiber (321, 323) is part of an optical cable comprising an electrical conductor; wherein the branching unit (210) is configured to receive electrical power via the optical cable; and an optical by-pass switch (345) configured to switch between a first mode, and a second mode; wherein in the first mode, the by-pass switch (345) is configured to couple the second incoming fiber (321 ) to the first outgoing fiber (322); and wherein in the second mode, the by-pass switch (345) is configured to couple the first incoming fiber (320) to the first outgoing fiber (322).
Abstract:
An arrangement at a Remote Node, a Remote Node, a Central Office, a WDM- PON and a method in an arrangement at a Remote Node, and a method in a Central Office are provided for supervision of the WDM-PON. The arrangement comprises at least one filter connected to the feeder fibre links and adapted to separate a data signal and an original OTDR signal received on either of the feeder fibre links. Further, the arrangement comprises a first splitter adapted to receive, from the at least one filter, the original OTDR signal, to split the original OTDR signal into a plurality of OTDR sub-signals and to output, to an N*M AWG, the plurality of OTDR sub-signals. The at least one filter is further adapted to output the original OTDR signal to the first splitter and to output the data signal to the AWG, thereby enabling supervision of the WDM-PON.
Abstract translation:提供远程节点,远程节点,中心局,WDM-PON和远程节点中的布置方法以及中心局的方法的布置,用于WDM-PON的监视。 该装置包括连接到馈线光纤链路的至少一个滤波器,并且适于分离在馈线光纤链路中的任一个上接收的数据信号和原始OTDR信号。 此外,该装置包括适于从至少一个滤波器接收原始OTDR信号的第一分离器,以将原始OTDR信号分割成多个OTDR子信号并将其输出到N * M AWG, 多个OTDR子信号。 所述至少一个滤波器还适于将原始OTDR信号输出到第一分路器并将数据信号输出到AWG,由此能够监视WDM-PON。
Abstract:
[Technical Problem] Placing optical performance monitors at all of nodes and links in a network results in a high monitoring capital expenditure (CAPEX). [Solution to Problem] A controller connected to a network and a plurality of nodes includes: a first degraded path detecting means for detecting a wavelength path as a first degraded path, whose quality is detected to be degraded, based on received parameter of wavelength paths in the network; a correlation path computation means for computing a correlation path which is correlated to the first degraded path; a second degraded path detecting means for detecting a second degraded path from the correlation path; and a failure localization means for localizing a node or a link connecting nodes as a failure node or a failure link, wherein the node or the link are traversed by both of the first degraded path and the second degraded path.
Abstract:
Dispositivo de Nodo Remoto (NR) óptico que, situado en un punto distante de una red de acceso o metropolitana de fibra óptica, realiza las funciones de enlace y transmisión de información entre diversas secciones de la red de forma pasiva, sin suministro eléctrico, mediante diversos componentes ópticos que extraen de la red a la que se conecta el NR las necesarias señales ópticas y potencias ópticas de bombeo e introduce en dicha red las señales ópticas de las secciones que conecta y un Equipo de Soporte que se sitúa en un punto de la red con suministro eléctrico y que proporciona a través de la red las potencias de bombeo requeridas por los NRs y dispone de la electrónica necesaria para realizar funciones de monitorización del funcionamiento de los NRs y regulación de su actividad.
Abstract:
Optical communication networks having multiple interconnected optical rings and optical protection switching mechanism to reduce communication delays and improve optical signal-to-noise ratios. Optical ring networks using variable optical attenuators for protection switching are also described.
Abstract:
A technique for carrying out protection of data traffic in a multi-channel multi-section optical communications network by simultaneously using Optical Multiplexed Section (OMS) protection and Optical Channel (OCH) protection; the technique comprises selection of a working optical signal in an OCH protected optical channel, in case of a fault in a section of the network, by relying on an indication associated with OMS switching functionality that is required to overcome the mentioned fault.
Abstract:
An optical power distributor is coupled to a high-intensity broadband light source to distribute in a shared manner an output of the high-intensity broadband light source to a plurality of optical line terminals. A depolarizer is also described having an input coupled to an output of a polarized broadband light source. A first integrated module has optical transmitters and an optical wavelength router for a first band. A second integrated module has optical receivers and an optical wavelength router for a second band.
Abstract:
A single fibre passive optical network (PON) wavelength division multiplex (WDM) overlay includes a central office (16), a fibre optic network (18-23), and a plurality of optical network termination (ONT) units (12, 14). The central office (16) has a baseline optical link that receives a baseline communication signal and converts the baseline communication signal into a downstream baseline optical signal within a first optical bandwidth, and has an additional optical link that receives a second type of communication signal and converts the second type of communication signal into a second downstream optical signal within a second optical bandwidth. The downstream baseline optical signal generated by the baseline optical link is combined with the second optical signal generated by the additional optical link to generate a broadband optical signal. The fibre optic network (18-23) is coupled to the central office and receives the broadband optical signal on at least one optic fibre. The fibre optic network splits the broadband optical signal to a plurality of fibre drops. The optical network termination (ONT) units are each coupled to a fibre drop. At least one of the ONT units is a baseline ONT unit (12) that receives the broadband optical signal form the fibre drop and splits the downstream baseline optical signal from the broadband optical signal, and at least one other of the ONT units (14) is an upgraded ONT unit that receives the broadband optical signal from the fibre drop and splits the downstream baseline optical signal and the signal and the second downstream optical signals from the broadband optical signal. In addition, the installation of the upgraded ONT unit to the PON does not effect baseline optical service to any other ONT unit.