Method for amplifying a burst optical signal, burst optical amplifier and system, and communications system

A burst optical amplifier, comprising:

• an auxiliary light source, configured to provide an auxiliary light;
• a combiner, configured to combine the auxiliary light provided by the auxiliary light source and a signal light into a mixed light and output the mixed light, wherein the auxiliary light is a non-burst light, the signal light is a burst light, and power of the auxiliary light is set to be independent from power of the signal light;
• a pump source, configured to generate a pump light;
• and
• an optical wavelength division multiplexer, configured to combine the pump light generated by the pump source and the mixed light output by the combiner and input the combined light into a gain medium, so as to obtain an amplified mixed light.

A communications system, comprising:

• a transmission optical fiber, configured to transmit an optical signal;
• a burst optical transmitter, configured to transmit a burst light;
• a non-burst light source, configured to generate a non-burst light, wherein power of the non-burst light is set to be independent from power of the burst light;
• a combiner, configured to receive the burst light that is transmitted through the transmission optical fiber and the non-burst light that is from the non-burst light source, and combine the burst light and the non-burst light into a mixed light;
• an optical amplifier, connected with the combiner through the transmission optical fiber, and configured to receive and amplify the mixed light;
• and
• a burst optical receiver, connected with the optical amplifier through the transmission optical fiber, and configured to receive the burst light amplified by the optical amplifier.