Underwater blue-green optical communication system with adjustable rate and variable distance

The invention discloses an underwater blue-green optical communication system with an adjustable rate and a variable distance, and the system is of a transmitting-receiving integrated structure, and comprises a transmitting light source, a modulation circuit, a condensing lens, a receiving optical assembly, and a signal processing assembly. The emission light source comprises an LD light source and an LED array light source formed by combining a plurality of LED light sources. Each LED light source is controlled by an independent switch; the modulation circuit controls the emission light source to output optical signals of different types or powers; the condensing lens is connected with the emission light source through a spatial light path, and converges and collimates light signals output by the emission light source; optical signals sent by the neighbor nodes are received and converged; the receiving optical assembly is arranged on the side, away from the condensing lens, of the emitting light source; the