Optical signal receiving apparatus, method and system, optical line terminal, computer-readable storage medium

An optical signal receiving method, configured to receive optical signals at multiple speeds, comprising:

• performing wavelength division processing on original optical signals, and outputting at least one of a first optical signal corresponding to a first wavelength range or a second optical signal corresponding to a second wavelength range;
• amplifying the first optical signal corresponding to the first wavelength range to obtain the amplified first optical signal;
• receiving the amplified first optical signal, performing noise reduction processing on the amplified first optical signal,
• converting the amplified first optical signal subjected to the noise reduction processing into a first electrical signal;
• converting the second optical signal corresponding to the second wavelength range into a second electrical signal;
• and
• preprocessing the first electrical signal and the second electrical signal to obtain a third electrical signal, and output the third electrical signal as a transmission electrical signal to a signal receiving end,
• wherein the third electrical signal is generated according to at least one of the first electrical signal or the second electrical signal.

An optical line terminal, comprising an optical signal receiving apparatus, the optical signal receiving apparatus is configured to receive optical signals at multiple speeds and comprises a first filter, an amplifier, a second filter, and a detection element, wherein

• the first filter is configured to perform wavelength division processing on original optical signals, and perform at least one of following operations:
• outputting a first optical signal corresponding to a first wavelength range through a first output optical path, or outputting a second optical signal corresponding to a second wavelength range through a second output optical path;
• the amplifier is configured to amplify the first optical signal corresponding to the first wavelength range to obtain the amplified first optical signal;
• the second filter is configured to receive the amplified first optical signal, perform noise reduction processing on the amplified first optical signal, and transmit the first optical signal subjected to the noise reduction processing to the detection element;
• and
• the detection element is configured to receive at least one of the first optical signal subjected to the noise reduction processing or the second optical signal corresponding to the second wavelength range, and convert at least one of the first optical signal subjected to the noise reduction processing or the second optical signal corresponding to the second wavelength range into a transmission electrical signal,
• wherein the optical line terminal further comprises a signal selection module configured to determine a speed level of a signal corresponding to a current scheduled time slot according to a corresponding relationship, between scheduled time slots and speeds of signals, stored in a time slot scheduling table, and select a first electrical signal or a second electrical signal as an effective electrical signal according to the speed level of the signal.