Optical module, processing component, plug component, system, and method

An optical signal transmission method is applied to an optical module, the optical module comprising:

• a processing component including:
• a target laser, an optical splitter connected to the target laser, and a modulator connected to the optical splitter, the optical splitter being configured to receive a to-be-split optical signal from the target laser and to split the to-be-split optical signal to obtain a first local oscillator optical signal and a to-be-modulated optical signal, the modulator being configured to receive the to-be-modulated optical signal and to modulate a service signal on the to-be-modulated optical signal to obtain a first service optical signal;
• or
• a processing component including:
• a first laser configured to send a first to-be-split optical signal having a first wavelength, a second laser configured to send a second to-be-split optical signal having a second wavelength different from the first wavelength, a first switch, a second switch, a processor, an optical splitter connected to the first laser and the second laser, and a modulator connected to the optical splitter, wherein:
• the first switch is connected between the first laser and the processor, the second switch is connected between the second laser and the processor;
• the processor is configured to control the first switch and the second switch to select between the first to-be-split optical signal and the second to-be-split optical signal;
• the optical splitter is configured to receive either the first to-be-split optical signal from the first laser or the second to-be-split optical signal from the second laser and to split the first or second to-be-split optical signal to obtain a first local oscillator optical signal and a to-be-modulated optical signal;
• and
• the modulator is configured to receive the to-be-modulated optical signal and to modulate a service signal on the to-be-modulated optical signal to obtain a first service optical signal;
• the optical module further including a plug component comprising a plurality of filters connected to a plurality of secondary ports, the processing component comprising a plurality of primary ports, and the optical module is switchable between a first connection status and a second connection status, the first connection status and the second connection status being different statuses of connections between the plurality of primary ports and the plurality of secondary ports, whereby a common primary port connects to a different secondary port in accordance with the connection status to which the optical module has been switched;
• the method comprising:
• sending a first service optical signal and a first local oscillator optical signal from the processing component to a peer optical module through the plurality of filters;
• sending a second service optical signal and a second local oscillator optical signal from the peer optical module to the processing component through the plurality of filters;
• performing, by the processing component, coherent detection on the second service optical signal based on the second local oscillator optical signal;
• wherein when the optical module is in the first connection status, the first service optical signal sent by the plurality of filters has a same first wavelength as the first local oscillator optical signal sent by the plurality of filters, and the second service optical signal sent by the plurality of filters has a same second wavelength as the second local oscillator optical signal sent by the plurality of filters;
• and
• when the optical module is in the second connection status, the first service optical signal sent by the plurality of filters has the same second wavelength as the first local oscillator optical signal sent by the plurality of filters, and the second service optical signal sent by the plurality of filters has the same first wavelength as the second local oscillator optical signal sent by the plurality of filters;
• wherein the first wavelength is different from the second wavelength.

A coherent optical transmission system, comprising:

• an optical module;
• and
• a peer optical module, wherein:
• the optical module comprises a processing component and a plug component, the processing component including a plurality of primary ports and the plug component including a plurality of filters connected to a plurality of secondary ports;
• and
• the optical module is switchable between a first connection status and a second connection status, wherein the first connection status and the second connection status are different statuses of connections between the plurality of primary ports and the plurality of secondary ports, whereby a common primary port connects to a different secondary port in accordance with the connection status to which the optical module has been switched;
• the plurality of filters is coupled to the processing component to send a first service optical signal and a first local oscillator optical signal optical signal to a peer optical module, and to send a second service optical signal and a second local oscillator optical signal from the peer optical module to the processing component, the processing component being configured to perform coherent detection on the second service optical signal based on the second local oscillator optical signal;
• wherein when the optical module is in the first connection status, the first service optical signal sent by the plurality of filters has a same first wavelength as the first local oscillator optical signal sent by the plurality of filters, and the second service optical signal sent by the plurality of filters has a same second wavelength as the second local oscillator optical signal sent by the plurality of filters;
• and
• when the optical module is in the second connection status, the first service optical signal sent by the plurality of filters has the same second wavelength as the first local oscillator optical signal sent by the plurality of filters, and the second service optical signal sent by the plurality of filters has the same first wavelength as the second local oscillator optical signal sent by the plurality of filters;
• wherein the first wavelength is different from the second wavelength.