COMMUNICATION SYSTEM, COMMUNICATION DEVICE, AND COMMUNICATION METHOD

摘要

PROBLEM TO BE SOLVED: To improve communication quality.

SOLUTION: A first communication device has a transmitter for combining first signal light and dummy light having a wave length differing from that of the first signal light, and transmitting the combined light. A first amplifier amplifies the light transmitted by the transmitter to specific power. A second communication device having a variable transmission part for separating the dummy light from the light amplified by the first amplifier and making the separated dummy light transmit by valuable transmittance combines the dummy light after transmitting the variable transmission part and second signal light having a wave length differing from that of the dummy light, and transmits the combined light. A second amplifier amplifies the light transmitted by the second communication device to specific power. A receiver installed in the first communication device receives the second signal light included in the light amplified by the second amplifier. A control part controls the transmittance of the variable transmission part.

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