3 results about "Gaussian laser beam" patented technology

This utility model discloses a high-order Hermit-Gaussian laser generator, comprising a pump source for providing laser light, and a first lens, a laser gain medium, a second lens, and an output coupling mirror arranged coaxially along the laser direction emitted from the pump source. The laser gain medium and the output coupling mirror are spaced apart and form a laser resonant cavity. The second lens is movably disposed within the laser resonant cavity and is positioned close to the laser gain medium along the laser direction emitted from the pump source to form a fundamental mode Gaussian beam. By performing an off-axis translation of the second lens in a plane perpendicular to the laser direction emitted from the pump source, the fundamental mode Gaussian beam is converted into a high-order Hermit-Gaussian laser beam, which is then output through the output coupling mirror. This method can replace the off-axis pumping method used in the prior art to generate a high-order Hermit-Gaussian laser beam to obtain a vortex laser.

This invention proposes a method and apparatus for processing microstructures on the inner surface of sealing grooves using zoned laser waveform adaptation, belonging to the field of aero-engine sealing technology. The processing method determines the boundary position of the inner surface of the sealing groove based on its inner surface parameters, and divides the inner surface of the sealing groove into a central bottom region and a corner region based on this boundary position. Different lasers are used for the central bottom region and the corner region (a square laser beam is used for the central bottom region, and a Gaussian laser beam is used for the corner region), thus adapting different laser waveforms to each zone. When processing sealing grooves (smaller structures), this reduces the heat-affected zone of the laser, solves the technical problem of product defects such as heat-induced microcracks, steps, or scratches easily occurring at corners, and improves the processing quality of the sealing groove.