Optical signal amplification apparatus and related optical communication device

An optical communication device, comprising:

• an electrical signal processing apparatus, wherein the electrical signal processing apparatus is configured to generate a first electrical signal that carries first service information;
• a laser emitting apparatus, wherein the laser emitting apparatus is configured to emit a plurality of single-wavelength beams of different wavelengths based on the first electrical signal, and each of the single-wavelength beams carries a part or all of service information in the first service information;
• a beam splitting/combining apparatus, wherein the beam splitting/combining apparatus is configured to combine the plurality of single-wavelength beams of different wavelengths into a signal beam;
• an optical signal amplification apparatus, wherein the optical signal amplification apparatus comprises a pump light source, a combiner assembly, a plurality of doped optical fibers connected in parallel, a plurality of collimation lenses, an optical splitter, and an optical filter;
• and
• a first optical fiber connection apparatus, wherein
• the optical signal amplification apparatus is configured to amplify the signal beam,
• the pump light source is configured to emit a pump beam, the combiner assembly is configured to combine the signal beam and the pump beam that are received, and couple a combined beam into the doped optical fiber, the doped optical fiber is configured to amplify the signal beam under excitation by the pump beam, and the signal beam comprises one or more single-wavelength signals;
• the optical splitter is configured to split the pump beam to obtain a plurality of split pump beams;
• the plurality of collimation lenses is configured to collimate and transmit one pump beam of the plurality of split pump beams to the combiner assembly;
• and
• the optical filter is disposed between two ends of each of the doped optical fibers, the optical filter is configured to transmit the signal beam in the doped optical fiber and is configured to filter out a first beam in the doped optical fiber, and the first beam comprises a beam of some wavelengths or a beam of all wavelengths generated by spontaneous emission in the doped optical fiber;
• and
• the first optical fiber connection apparatus is configured to output the signal beam amplified by the optical signal amplification apparatus.