Ciena

About: Ciena is a company organization based out in Hanover, Maryland, United States. It is known for research contribution in the topics: Signal & Node (networking). The organization has 1259 authors who have published 1557 publications receiving 25989 citations.

Higher-order four-wave mixing and its effect in WDM systems

Abstract: Higher-order four-wave mixing effects are evaluated in WDM systems. Calculated and measured results show that higher-order FWM crosstalk, though small compared to the first-order FWM crosstalk, could be significant in unequal channel-spacing WDM systems where the first-order FWM is not a problem.

Methods and systems for session initiation protocol control of network equipment

Abstract: A network method utilizing Session Initiation Protocol to establish a network path between network elements in a network includes generating a request for a network service in Session Initiation Protocol, wherein the request is one of manually and automatically configured, and wherein the request is directed to the network; obtaining network resources responsive to the request, wherein the network resources comprise network parameters required to obtain and provision the network path; and configuring the network resources responsive to the request. The network includes a plurality of network elements operable to receive Session Initiation Protocol requests. Optionally, the plurality of network elements include a plurality of optical network elements, wherein the network route includes wavelengths between a first and second optical network element in the network. The network parameters include one or more of available wavelengths, available bandwidth, available regeneration points, available circuits, intermediate network elements, and combinations thereof.

Optical communication network path restoration

Abstract: A method and system of determining a new path through an optical network from a source node to a destination node when a link in an original path fails are disclosed. When a fault on a link is detected, adjoint weights are assigned to each operational link for each node on the original path. A connection cost is determined for each node based on the adjoint weights of the links connected to the node. A new path through the optical network is determined based at least in part on the adjoint weights and the connection costs.

Channelized oduflex systems and methods for flexible ethernet and otn multiplexing

Abstract: Systems and methods to provide a channelized Optical channel Data Unit flexible (ODUflex) include receiving a signal; multiplexing the signal into a Tributary Slot (TS) of the channelized ODUflex, wherein the channelized ODUflex supports a variable number of TSs and a variable size; and mapping the channelized ODUflex into an Optical channel Transport Unit k/Cn (OTUk/Cn) (k = 1, 2, 3, 4), (n = 1, 2, 3, ...). A network element configured to operate in an OTN network includes one or more ports coupled to switching circuitry, wherein a first port is configured to receive a signal, wherein the switching circuitry is configured to multiplex the signal into a TS of a channelized ODUflex, wherein the channelized ODUflex supports a variable number of TSs and a variable size (rate), and wherein a second port is configured to map the channelized ODUflex into an OTUk/Cn.

Optical receiver systems and methods for polarization demultiplexing, PMD compensation, and DXPSK demodulation

Abstract: A simplified optical receiver architecture capable of tracking and demultiplexing polarization-multiplexed signals, dynamically compensating for PMD using a variety of polarization controller technologies, and reducing the number of delay line demodulators by two for both DPSK and DQPSK modulation is illustrated. Once polarization is stabilized at the first stage of the cascaded system of the present invention, subsequent stages can be simplified and cost reduced.