A system includes a first communication device and a second communication device in communication with the first communication device via an Ethernet connection. The first communication device is configured to transmit, via the Ethernet connection toward the second communication device, an Ethernet signal including information of a designated wavelength from a dense wavelength division multiplexing (DWDM) scheme to be used by the second communication device. The second communication device is configured to transmit an optical signal at the designated wavelength to the first communication device in response to receiving the Ethernet signal.

A computer implemented method of configuring an optical path includes selecting with one or more processors a wavelength for the optical path, generating with one or more processors, a first request for a first type of node in the optical path, generating with one or more processors a second request for a second type of node in the optical path, the second type of node having different data plane capabilities than the first type of node, wherein the first and second requests are generated as a function of a joint configuration model accommodating both types of nodes, and sending the first request from the one or more processors to the first type of node and the second request to the second type of node to configure the optical path.

A transport network, a node, and a method are disclosed. The transport network, the node, and the method detect a failure of a super channel originating from a sliceable light source that is routed through the transport network, by detecting an optical loss of signal by an optical power monitoring device, in presence or absence of an optical loss of signal of the complete band by at least one photo detector. This information is analyzed with a fault detection algorithm using a patch cable network configuration to determine a fault indication for a failure within the first node. The fault signal indicative of the fault indication is then passed to another node on the first path.

A network element includes a transmitting amplifier configured to transmit to a first optical fiber, wherein the transmitting amplifier has a pump laser; and an optical monitor connected to a second optical fiber and configured to detect a portion of optical power thereon; wherein the pump laser is modulated to convey a signal to a second optical monitor in a second network element connected to the first optical fiber, when the transmitting amplifier is one of in a safety mode and has no input.

A transmission device configured to transmit main signal light to another transmission device through a transmission line, the transmission device includes a transceiver configured to output supervisory signal light including information on supervisory control on the transmission device and the other transmission device, an attenuator configured to attenuate the supervisory signal light, a combiner configured to combine the supervisory signal light to the main signal light, and a control circuit configured to control an attenuation amount of the attenuator so that power of the supervisory signal light received by the other transmission device approaches a given target value.

The present disclosure relates to a technical field of optical communication, and more particularly to a device and method for matching optical fiber connections for ROADM service side, wherein the device comprises a reference control optical channel transmitter, a downlink WSS, a plurality of emitting ports, a reference control optical channel receiver, an uplink WSS and a plurality of receiving ports; the reference control optical channel transmitter emitting a reference control optical channel signal, and the downlink WSS emitting the reference control optical channel through the respective emitting ports in a polling manner; the reference control optical channel receiver receiving the reference control optical channel signal, and the uplink WSS selectively receiving the reference control optical channel over the plurality of receiving ports in the polling manner; wherein the reference control optical channel operating within an operating wavelength range of WSSs in the ROADM but outside a wavelength range of a service optical channel. By using WSS to control polling of the reference control optical channel among service side ports of ROADM, the present disclosure realizes an auto-routing matching of an optical fiber connection between different service side ports of ROADM and improves configuration efficiency, and at the same time, also realize to monitor performance of the optical fiber connection between service side ports of ROADMs in different directions and be a standby physical channel for chassis cascade.

Systems and methods are in a node in a network utilizing a control plane for triggering mesh restoration due to intra-node faults, and include monitoring at least one channel at a degree at a plurality of degrees associated with the node; detecting a fault on the at least one channel, wherein the fault is an intra-node fault upstream of the degree; and transmitting a channel fault indicator downstream of the fault to at least one downstream node along a path of the faulted channel, wherein restoration is triggered based on the channel fault indicator.

In order to provide a feature with which it is possible to suppress the occurrence of an optical surge independently of the type of optical switch, there is provided an optical control device for processing inputted first light and outputting second light, wherein the optical control device is provided with: a switching unit for switching and outputting first light that has undergone a selected process; and a variable output unit connected in series to the switching unit, the variable output unit operating so as to reduce the optical power of the second light before switching by the switching unit is executed and to gradually increase the optical power of the second light after the switching is executed.

Systems and methods for performing connectivity verification testing and topology discovery in a reconfigurable optical add/drop multiplexer (ROADM) are provided. The ROADM can include a ROADM block having a plurality of internal ports connected to a fiber shuffle via respective optical fibers. The ROADM block includes a test signal transmitter configured to inject an outgoing test signal having a unique signature into each internal port. The outgoing test signals are out-of-band of optical data signals traversing the ROADM. The ROADM block includes a test signal monitor configured to monitor for incoming test signals at each of the internal ports. The test signal monitor is configured to validate, based on a signature of an incoming test signal received at an internal port of the ROADM block, whether a valid connection exists between the internal port and an internal port of a second ROADM block.

A software-defined network multi-layer controller (SDN-MLC) may communicate with multiple layers of a telecommunication network. The SDN-MLC may have an optimization algorithm that helps in capacity planning of the telecommunications based on the management of multiple layers of the telecommunication network.