Variable air duct heat dissipation structure for air-cooled high-power fiber laser

A variable air duct heat dissipation structure for an air-cooled high-power fiber laser comprises a casing, a constant-current driving module and a plurality of pumping source modules, a main air duct and a variable air duct are arranged on one side of the casing, a plurality of pumping source heat dissipation plates and a plurality of laser gain cavity heat dissipation plates are arranged in the casing, a fan is arranged on the other side of the casing, and the constant-current driving module is connected with the constant-current driving module. The pumping source heat dissipation plate and the laser gain cavity heat dissipation plate are arranged right opposite to the main air channel, the pumping source module and the constant-current driving module are both installed on the pumping source heat dissipation plate, the constant-current driving module is installed on the laser gain cavity heat dissipation plate, the laser gain cavity heat dissipation plate is used for installing an optical fiber laser, and t