Aspects of the disclosure involve a source node, having some predetermined knowledge of the optical network generating a list of nodes and/or optical links between nodes that form a route in the optical network from the source node to the destination node. The nodes in the optical network do not necessarily need to know the entire route from source node to destination node. Each node simply decodes the control information identifying the next hop in the route towards the destination node. By utilizing the decoded control information identifying the next hop, a switch in the node can be controlled to route the optical signal including the payload and some or all of the control information onto the next optical link toward the destination node.

An optical network including an input to receive from an optical network light comprising plural wavelength components. An optical wavelength selective filter, optically connected to the input, extracts a first wavelength component of the plural wavelength components from the light, thereby providing a first optical signal including the first wavelength component and a second optical signal including a remainder of the plural wavelength components a light emitter to provide a modulated broadband optical signal. A first output, optically connected to the optical wavelength selective filter, receives a first portion of the second optical signal for transmission to a light detector and a second output, optically connected to optical wavelength selective filter, receives a second portion of the second optical signal for transmission to the optical network.

The disclosure is directed to an optical telecommunications system which includes a central node and a plurality of user nodes. The central node provides the light necessary to enable communication between the user nodes. Within the central node is a multi-wavelength source, providing lights at different wavelengths, along with a wavelength selector. The wavelength selector selects one of the lights at different wavelengths from the multi-wavelength source for delivery to the user nodes such that the user nodes then modulate this light for transmission between nodes.

Disclosed is an invention related to a wavelength selective switch for multiple units. The wavelength selective switch for multiple units according to the present invention comprises: multiple input/output port groups comprising multiple input/output port arrays for transmitting multiple light beams comprising multiple wavelength channels, respectively; a switching lens portion configured such that light beams output from respective input/output ports intersect on a switching axis; a first prism portion arranged between the multiple input/output port arrays and the switching lens portion and configured such that respective light beams groups output from the multiple input/output port arrays refract at different angles on the switching axis; a second prism portion arranged after the switching lens portion and configured such that a center line of a light beam group output from the switching lens portion is arranged in parallel with an optical axis; a light expansion portion for expanding the beam size of a light beam output from the second prism portion in a dispersion axis direction; a light splitting portion for splitting the light beam, the beam size of which has been expanded by the light expansion portion, at a different angle on the dispersion axis according to the wavelength component; an image lens portion for readjusting and focusing wavelengths split by the light splitting portion; and a switching portion comprising divided surfaces corresponding to the multiple input/output port groups, the switching portion being configured to change the angle of a selected wavelength on the switching axis such that a wavelength channels of an input port selected independently with regard to each group is transmitted to an output port selected independently.

An optical network including an input to receive from an optical network light comprising plural wavelength components. An optical wavelength selective filter, optically connected to the input, extracts a first wavelength component of the plural wavelength components from the light, thereby providing a first optical signal including the first wavelength component and a second optical signal including a remainder of the plural wavelength components a light emitter to provide a modulated broadband optical signal. A first output, optically connected to the optical wavelength selective filter, receives a first portion of the second optical signal for transmission to a light detector and a second output, optically connected to optical wavelength selective filter, receives a second portion of the second optical signal for transmission to the optical network.

Data center interconnections, which encompass WSCs as well as traditional data centers, have become both a bottleneck and a cost/power issue for cloud computing providers, cloud service providers and the users of the cloud generally. Fiber optic technologies already play critical roles in data center operations and will increasingly in the future. The goal is to move data as fast as possible with the lowest latency with the lowest cost and the smallest space consumption on the server blade and throughout the network. Accordingly, it would be beneficial for new fiber optic interconnection architectures to address the traditional hierarchal time-division multiplexed (TDM) routing and interconnection and provide reduced latency, increased flexibility, lower cost, lower power consumption, and provide interconnections exploiting NMD Gbps photonic interconnects wherein N channels are provided each carrying M wavelength division signals at D Gbps.

Data center interconnections, which encompass WCs as well as traditional data centers, have become both a bottleneck and a cost/power issue for cloud computing providers, cloud service providers and the users of the cloud generally. Fiber optic technologies already play critical roles in data center operations and will increasingly in the future. The goal is to move data as fast as possible with the lowest latency with the lowest cost and the smallest space consumption on the server blade and throughout the network. Accordingly, it would be beneficial for new fiber optic interconnection architectures to address the traditional hierarchal time-division multiplexed (TDM) routing and interconnection and provide reduced latency, increased flexibility, lower cost, lower power consumption, and provide interconnections exploiting NMD Gbps photonic interconnects wherein N channels are provided each carrying M wavelength division signals at D Gbps.

Data center interconnections, which encompass WSCs as well as traditional data centers, have become both a bottleneck and a cost/power issue for cloud computing providers, cloud service providers and the users of the cloud generally. Fiber optic technologies already play critical roles in data center operations and will increasingly in the future. The goal is to move data as fast as possible with the lowest latency with the lowest cost and the smallest space consumption on the server blade and throughout the network. Accordingly, it would be beneficial for new fiber optic interconnection architectures to address the traditional hierarchical time-division multiplexed (TDM) routing and interconnection and provide reduced latency, increased flexibility, lower cost, lower power consumption, and provide interconnections exploiting NMD Gbps photonic interconnects wherein N channels are provided each carrying M wavelength division signals at D Gbps.

A node in a wavelength division multiplexing (WDM) system is provided, which includes: a colorless optical transmitter, a first arrayed waveguide grating, a first waveband filter configured to divide an input optical signal into M sub-signals of different wavebands and output to a first optical switch, and a first optical coupler/a first optical combiner. A transmit end of the colorless optical transmitter is coupled to an input end of the first waveband filter via the first arrayed waveguide grating. The first optical switch is configured to connect an output end of the first waveband filter to an input end of the first optical coupler/the first optical combiner according to a control signal. An output end of the first optical coupler/the first optical combiner is coupled to an optical transmission path.

System and method for managing spectral hole burning (SHB) effect in an optical transport network (OTN) link. The method is performed by an automatic gain control (AGC) circuit of an amplification assembly of the OTN link. The method comprises determining, via a first photodetector communicatively connected to the AGC circuit, an input power of an income signal and, in response to the input power being less than a predetermined portion of a full-loading signal power, causing a pump power variable attenuator (PVOA) of the amplification assembly to attenuate pump power from a pump source, the PVOA being disposed optically intermediate a first doped fiber and a second doped fiber of the amplification assembly.