Service optical signal transmission method, network device, and optical network

A network device, wherein the network device comprises 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 is configured to transmit M first optical signals to each of the plurality of wavelength selection modules, wherein M is a positive integer greater than 1;
• each of the plurality of wavelength selection modules is configured to transmit K second optical signals to the respective first optical transceiver, wherein K is a positive integer less than or equal to M, wherein each of the plurality of wavelength selection modules is configured to transmit a second optical signal having a target wavelength to the respective first optical transceiver, and wherein the target wavelength is a wavelength transmitted to the respective wavelength selection module;
• and
• the respective first optical transceiver is configured to modulate a service electrical signal on each of the K second optical signals to output K service optical signals.

An optical network, wherein the optical network comprises a plurality of optical transceivers, the plurality of optical transceivers comprise N first optical transceivers and at least one second optical transceiver, the N first optical transceivers are connected to the at least one second optical transceiver by using at least one optical switching module, the N first optical transceivers are located in a network device;

• and
• the at least one optical switching module is configured to transmit K service optical signals from the N first optical transceivers to the at least one second optical transceiver, wherein:
• the network device comprises 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 is configured to transmit M first optical signals to each of the plurality of wavelength selection modules, wherein M is a positive integer greater than 1;
• each of the plurality of wavelength selection modules is configured to transmit K second optical signals to the respective first optical transceiver, wherein K is a positive integer less than or equal to M, wherein each of the plurality of wavelength selection modules is configured to transmit a second optical signal having a target wavelength to the respective first optical transceiver, and wherein the target wavelength is a wavelength transmitted to the respective wavelength selection module;
• and
• the respective first optical transceiver is configured to modulate a service electrical signal on each of the K second optical signals to output K service optical signals.