Abstract: A communication system, a transmitter, and a communication method. The communication system includes M transmitters, N receivers, and an optical switch network. Both N and M are positive integers greater than 1. The optical switch network includes one or more optical switches. A plurality of optical paths are configured in the optical switch network. When the transmitter communicates with the receiver, the transmitter can determine, from the plurality of optical paths, a target optical path from a source communication node to a destination communication node. After the optical switch network receives a target optical signal sent by the transmitter, the optical switch directly sends the target optical signal to the receiver based on the target optical path.

Abstract: Embodiments of the present application provide a method for controlling voltages of a liquid crystal on silicon (LCoS) two-dimensional array which includes a plurality of pixel sets, and the plurality of pixel sets include a first pixel set and a second pixel set. The method includes: determining a plurality of bit sequences, where the plurality of bit sequences include a first bit sequence and a second bit sequence; controlling a voltage of the first pixel set by using the first bit sequence; and controlling a voltage of the second pixel set by using the second bit sequence, where the first pixel set and the second pixel set are in different phase cycles in a port direction of the LCoS two-dimensional array, the first pixel set and the second pixel set have a same phase, and duty ratios of the first bit sequence and the second bit sequence are the same.

Abstract: The present disclosure describes a service optical signal transmission method, a network device, and an optical network. A network device includes a light source module. The light source module is connected to a plurality of wavelength selection modules. Each of the plurality of wavelength selection modules is connected to a respective first optical transceiver, and different wavelength selection modules are connected to different first optical transceivers. The light source module transmits M first optical signals to each of the plurality of wavelength selection modules, where M is a positive integer greater than 1. Each of the plurality of wavelength selection modules transmits K second optical signals to the respective first optical transceiver, where K is a positive integer less than or equal to M. The respective first optical transceiver modulates a service electrical signal on each of the K second optical signals to output K service optical signals.

Abstract: Embodiments of the present invention provide an optical switching apparatus, an optical switching method, an optical switching node, and a system, to implement switching of optical signals in more transmission directions. The optical switching apparatus includes input ports, a first dispersion member, a first switching engine, a first beam combining member, a first lens group, a second dispersion member, a second beam combining member, a second switching engine, and output ports. The first switching engine and the second switching engine jointly change transmission directions of sub-wavelength light beams along a wavelength plane and a port plane, the wavelength plane and the port plane are perpendicular to each other, and both the wavelength plane and the port plane are parallel to transmission directions of first light beams.

Abstract: An optical communication system includes a sending device, an optical cross-connect (OXC) device, and a first receiving device. The sending device is configured to send a modulated first service optical signal to the OXC device. The OXC device is configured to receive the modulated first service optical signal through a first input port, and divide the modulated first service optical signal into N1 first optical signals based on a wavelength. The OXC device is configured to send M1 first optical signals to the first receiving device through M1 first output ports.

Abstract: An optical transmitter, including a wavelength selector and a plurality of modulator groups, is proposed. Each modulator group includes a plurality of modulators, and operating wavelengths of any two modulators in a same modulator group are different. The wavelength selector is configured to: obtain a first beam from a multi-wavelength light source, and generate a second beam based on the first beam, where the second beam includes some of the plurality of wavelengths. A first modulator in a first modulator group is configured to modulate first to-be-sent data onto a first wavelength in the second beam.

Abstract: A route calculation method, device, and system. The route calculation method includes: receiving, by a first device, a service request message, where the service request message is used to request the first device to determine a transmission path of a borne service requested by the service request message to be established; and determining, by the first device, a transmission path of the service based on the service request message and first bearing capability information, where the first bearing capability information is used to indicate an actual bearing capability of each link on the transmission path. According to the foregoing solution, the system can calculate a route and configure the service based on an actual service bearing capability of each link of a network.

Abstract: An optical module is disclosed. The optical module includes a first downlink port, a second downlink port, a directional coupler, a optical attenuator, a first photodiode (PD), and a second PD. The directional coupler, connected to the first downlink port, is configured to receive a downlink optical signal. The second PD connected to the directional coupler, is configured to obtain a power value. If the power value is greater than a first threshold, the optical attenuator is configured to receive a attenuation control signal, and attenuate, based on the attenuation control signal, a power of an optical signal passing through the second downlink port. The first PD is configured to: convert the downlink optical signal into a downlink electrical signal, and convert the optical signal passing through the second downlink port into an electrical signal. Both the first downlink port and the second downlink port are connected to the first PD.

Abstract: Embodiments of the present application provide a method for controlling voltages of a liquid crystal on silicon (LCoS) two-dimensional array which includes a plurality of pixel sets, and the plurality of pixel sets include a first pixel set and a second pixel set. The method includes: determining a plurality of bit sequences, where the plurality of bit sequences include a first bit sequence and a second bit sequence; controlling a voltage of the first pixel set by using the first bit sequence; and controlling a voltage of the second pixel set by using the second bit sequence, where the first pixel set and the second pixel set are in different phase cycles in a port direction of the LCoS two-dimensional array, the first pixel set and the second pixel set have a same phase, and duty ratios of the first bit sequence and the second bit sequence are the same.