7 results about "Gaussian laser beam" patented technology

The invention discloses a femtosecond laser operation flat-topped beam shaping optical system which comprises a laser, a beam expander, a DOE shaping module and a focusing scanning module. The laser is used for outputting a femtosecond Gaussian laser beam, and the femtosecond Gaussian laser beam sequentially passes through the beam expander, the DOE shaping module and the focusing scanning module and then acts on an operation area; the beam expander is used for expanding the diameter of the femtosecond Gaussian laser beam to the beam diameter used for cutting the light path; the DOE shaping module comprises a DOE diffractive optical element; the DOE diffractive optical element is arranged on a path of the femtosecond Gaussian laser beam and is used for converting an incident Gaussian beam into a flat-topped beam with uniformly distributed energy through phase modulation; the flat-topped light beam has no local energy peak value, thermal damage and excessive ionization of traditional Gaussian laser to normal tissues of eyes are avoided, postoperative inflammatory response is light, the tissue recovery speed is increased, and the risk of operative complications is reduced.

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.

Aspects of the present disclosure relate generally to systems and methods for use in the implementation and / or operation of quantum information processing (QIP) systems, and more particularly, for beam shaping for large aspect ratios with a single cylindrical lens. In some aspects, a QIP system includes a laser source, a cylindrical lens, and an ion trap. The laser source produces a Gaussian laser beam. The cylindrical lens is aligned with at least a portion of the laser beam and shapes the laser beam into a beam having an anamorphic shape. The ion trap includes a plurality of trapped ions addressable by the beam. The cylindrical lens orients the beam relative to the ion trap such that a fast axis of the beam is aligned with an axis of the plurality of trapped ions, and a slow axis of the beam is traverse to the plurality of trapped ions.

The invention discloses a non-vision field optical communication device and method based on a partially coherent vortex light field, and belongs to the technical field of laser, and the device comprises a laser device which is used for generating a Gaussian laser beam; the first light modulation module is used for converting the Gaussian laser beam into a partially coherent Gaussian-Shell model light beam; the second light modulation module is used for converting the Gaussian-Schell model light beam into a Laguerre Gaussian-Schell model vortex light beam; the third light modulation module is used for shielding the Laguerre Gaussian-Shell model vortex light beam and then obtaining a modulated light beam through phase modulation; wherein the modulation phases are two diffraction phases obtained through light diffraction neural network training, and after light beams modulated through the first diffraction phase and the second diffraction phase in sequence are transmitted for a fixed distance, the light beams are displayed as rectangular light beams at different positions under the condition of different topological charges; and the light beam receiving and identifying module is used for receiving the rectangular light beams at different positions and completing non-vision field optical communication through light beam identification.

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.

The invention relates to the technical field of quantum computing, and provides an optical addressing system and method and a quantum computer.The system and method conduct deflection regulation and control on Gaussian laser beams with Doppler frequency shifts.Corresponding diffraction spots with the same Doppler frequency shiftsbetween any positions are obtained, then wavefront aberration of the diffraction spots is measured, and the optical addressing effect is achieved. Aberration compensation is carried out on the diffraction light spot or the Gaussian laser beam according to the detected wavefront aberration, and an addressing light spot is obtained; and focusing the addressing light spot on each target quantum of a one-dimensional ion chain in an ion trap to realize ion addressing. According to the system and the method disclosed by the invention, the wavefront aberration of the diffracted light wave is detected through the light modulation module, aberration compensation is carried out according to the detected wavefront aberration, and then optical independent addressing with excellent image quality, flexibility, controllability and strong expansibility is realized for a plurality of target quantum sites on a one-dimensional ion chain in an ion trap.

The invention discloses a Gaussian laser beam homogenization method and system based on a step-type film, and the method comprises the steps: dividing a central region into a plurality of sub-regions according to the light intensity distribution of Gaussian beams, and enabling each sub-region to correspond to a different transmittance; setting an optimization target, and calculating an initial transmittance curve of each step type region based on the target light intensity and the region original light intensity; the average value of the transmittance curves of all the sub-regions is calculated, and the average value is the step type sub-region transmittance of the region; in the optimization process, the ratio of the maximum light intensity to the minimum light intensity is used as a constraint condition, a loss function is set, and the range and the transmittance of each step type region are gradually adjusted through iteration; according to the boundary of the sub-region and the transmissivity after iterative optimization, carrying out film coating treatment on each step region of the micro-lens array step by step; and each sub-region adopts a corresponding transmittance value to adjust the energy distribution of the central region and the edge region, so that the Gaussian laser meets the consistency of the energy distribution.