Slab laser module with wave-front distortion self-correction ability

The invention provides a slab laser module with wave-front distortion self-correction ability through optimizing thermal management and optical path design. The slab laser module comprises a laser reflection device and a slab medium used as a gain medium. The upper and lower surfaces at the two ends of the slab medium are evanescent-membrane-free areas, and the middle part between the upper and lower surfaces is an evanescent membrane area. Incident laser L1 enters the inside of the slab medium from the evanescent-membrane-free area at one end of the slab medium, is transmitted along the length direction of the slab medium, and goes out from the evanescent-membrane-free area at the other end of the slab medium. The laser reflection device reflects the output incident laser L1 into the slab medium for second transmission, and the incident laser L1 goes out from the incidence end of first transmission. The constraint condition for the point-of-incidence position of second transmission of the incident laser L1 i