Device for changing laser transmission characteristics by utilizing photo-thermal effect

The invention discloses a device for changing laser transmission characteristics by utilizing a photo-thermal effect, and relates to the field of laser beam quality control. The problem of beam distortion correction in the conventional intense laser system is solved. The device comprises a ring heater, an optical element, a vacuum chamber, a beam splitter, a lens, temperature control equipment, a charge-coupled device (CCD) camera and a four-quadrant detector, wherein the optical element with the ring heater is arranged in the vacuum chamber with a laser window; a laser beam is split into two paths of beams by the beam splitter after passing through the optical element with the ring heater, one path of beam is received by the four-quadrant detector, and the other path of beam is imaged on the CCD camera after being focused by the lens; a computer solves the imaging information of the CCD camera, and transmits the solved imaging information to the temperature control equipment; and the temperature control equipment performs temperature control on the ring heater according to the received information. The device can be used for the correction of wave front distortion of lasers with various wavelengths.