Light emitter

The invention discloses a light emitter. The light emitter comprises a substrate; the semiconductor refrigeration assembly is arranged on the substrate; the light-emitting component is mounted on the semiconductor refrigeration component, so that the semiconductor refrigeration component cools the light-emitting component, and the light-emitting component is configured to generate a laser beam; the tube shell is mounted on the substrate so as to package the semiconductor refrigeration assembly and the light-emitting assembly; the optical fiber is suitable for outputting the laser beam generated by the light-emitting assembly to the outside of the tube shell; and the transparent filling glue is filled in a space between the inner wall of the tube shell and the substrate, and is configured to guide a laser beam generated by the light-emitting assembly to the optical fiber and transfer heat generated by the light-emitting assembly to the tube shell. Heat in the light emitter can be more effectively and quickly t