A method performed by an optical network controller includes: obtaining a topology structure of a subnet of a cluster, where the topology structure records an address of compute nodes in the subnet; determining a wavelength division configuration based on the topology structure, where the wavelength division configuration is used to allocate different wavelengths to the compute nodes in the subnet; providing the wavelength division configuration for the optical network switching device. Then the optical network switching device establishes an optical path between the optical network switching device and the compute node in the subnet based on the wavelength division configuration.

There is provided an optical filter module comprising a photodetector, a transmitting-side tunable optical filter, and processing circuitry. The photodetector is configured to receive a low speed overlay signal from a transceiver of a fixed wavelength, and wherein the processing circuitry is configured to decode information relating to the fixed wavelength from the low speed overlay signal and set the transmitting-side tunable optical filter at the fixed wavelength.

A passive optical network includes a central office providing subscriber signals; a fiber distribution hub including an optical power splitter and a termination field; and a drop terminal. Distribution fibers have first ends coupled to output ports of a drop terminal and second ends coupled to the termination field. A remote unit of a DAS is retrofitted to the network by routing a second feeder cable from a base station to the hub and coupling one the distribution fibers to the second feeder cable. The remote unit is plugged into the corresponding drop terminal port, for example, with a cable arrangement having a sealed wave division multiplexer.

An objective is to easily set a wavelength of an optical signal received by an optical transceiver. A first reception unit receives a first optical signal including identification information and reception wavelength information. A determination unit determines whether the identification information satisfies a predetermined condition. A wavelength filter has a tunable wavelength and transmits a second optical signal of the transmission wavelength included in an input optical signal. When the judgment unit judges that the identification information satisfies the predetermined condition, a wavelength instruction unit instructs the wavelength filter to use a transmission wavelength based on the reception wavelength information. A second reception unit receives a second optical signal.

A wireless communication method in a wireless communication system including an aggregation station and an extension station that performs beamforming according to control of the aggregation station, in which the aggregation station transmits an optical signal including at least a beam control signal for controlling beamforming in the extension station and a transmission signal that is data to be transmitted to the extension station via an optical transmission line to perform beamforming control of the extension station, and the extension station transmits the transmission signal by setting, in a phase shifter or by switching a switch, a phase difference for performing beamforming in a specific direction on a basis of the beam control signal included in the optical signal.

An optical communication device includes: a first optical switch that is connected to a plurality of optical transmission lines and outputs an optical signal input from any of the optical transmission lines to another optical transmission line; a second optical switch that is connected to a plurality of optical transmission lines and outputs an optical signal input from any of the optical transmission lines to another optical transmission line; and a multicast transfer unit configured to perform multicast transfer of an optical signal transmitted from a first device connected to the first optical switch to one or more second devices connected to the second optical switch.

An optical communication device includes: a plurality of first distribution units that is connected to a plurality of optical transmission lines and outputs an optical signal input from any of first devices to any of the optical transmission lines; a plurality of second distribution units that is connected to a plurality of optical transmission lines and outputs an optical signal input from any of the optical transmission lines to any of second devices; and a transfer unit configured to transfer the optical signal transmitted from the first device connected to any of the plurality of first distribution units to any of the plurality of second distribution units connected to the specific second device.

A beamforming apparatus and method are provided, to implement fully connected beamforming by using a wavelength division multiplexing technology. In this application, radio frequency signals are modulated on laser signals with different wavelengths; and then after combination and splitting, phase adjustment is selectively performed on the radio frequency signals with the different wavelengths on paths through wavelength selection units, to change transmit angles of beams transmitted at antenna ends. In another manner, in this application, radio frequency signals are modulated on laser signals with different wavelengths, each path of optical signal in the modulated radio frequency signal is split into a plurality of paths for phase adjustment, and then the phase-adjusted signals are combined and sent, to change transmit angles of beams transmitted at antenna ends. In addition, the solutions provided in this application are applicable to direct modulation, direct detection, and heterodyne or homodyne coherent detection.

An integrated photonic device independently directs each channel of a multiplexed input optical signal received from a corresponding one of N input port to one of N output ports, each multiplexed input optical signal including N channels. The device includes: N input waveguides; secondary waveguides; wavelength-selective filters, each: i) including a ring resonator, ii) being optically coupled to a corresponding one of the N input waveguides and a corresponding one of the secondary waveguides, and iii) being switchable between a first state in which an optical signal in a corresponding one of the N channels is coupled from the corresponding input waveguide into the corresponding secondary waveguide and a second state in which the optical signal in the corresponding one of the N channels is not coupled into the corresponding secondary waveguide; N multi-wavelength mixers; and N output waveguides.

The present application discloses a multi-wavelength label signal processing method, a processor, and a storage medium. The method comprises: acquiring a service spectrum width of an optical service (S110); determining a carrier frequency according to the service spectrum width and a preset carrier frequency range (S120); performing modulation processing on wavelength information of the optical service according to the carrier frequency to obtain a single-frequency label signal or a dual-frequency label signal (S130); and sending the single-frequency label signal or the dual-frequency label signal to a signal receiving end, so that the signal receiving end obtains optical power and the wavelength information according to the single-frequency label signal or the dual-frequency label signal (S140).