External cavity device of single-tube blue-light semiconductor laser

The invention discloses a single-tube blue-light semiconductor laser external cavity device, and relates to the technical field of conductor lasers. A single-tube blue light semiconductor laser external cavity device comprises an emitter, a heat sink assembly and an optical assembly, and the bottom of the emitter is fixedly connected with the top of the heat sink assembly; according to the single-tube blue-light semiconductor laser, through the copper sleeve and the heat sink assembly, in the air exhaust process, the connecting tube can convey air in the negative-pressure fan into the conveying tube, then the air is conveyed into the heat absorption tube through the conveying tube, and due to the fact that a flowing cavity in the heat absorption tube is two times that of an absorption opening, the heat absorption efficiency is improved; when heat is deposited in the bottom heat exchange plate, the heat is conveyed into the absorption opening through the sleeve cavity, meanwhile, the absorption opening conveys