20 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 application discloses a Hermitian-Gaussian laser beam generating device, particularly a high-purity one-dimensional Hermitian-Gaussian laser beam generating device, comprising: a laser gain module, a cavity mirror element of a resonant cavity, a laser cavity mode selection element, and a laser mode detection module. The laser gain module is used to achieve stable laser gain; the cavity mirror of the resonant cavity is selected with a suitable output coupling ratio to cooperate with the laser gain module to achieve efficient laser output; the laser cavity mode selection element selects the transverse mode within the laser resonant cavity in two directions; the laser mode detection module is used to observe the envelope of the output beam and adjust the angle of the cavity mirror based on the observation results to introduce detuning into the resonant cavity, while simultaneously adjusting the position of the laser mode selection element to achieve differentiated control of the loss of different orders of cavity modes, ensuring high-purity output of one-dimensional high-order Hermitian-Gaussian laser beams of different orders.

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.

In an embodiment, a method of forming a blind via in a substrate comprising a mask layer, a conductive layer, and a dielectric layer is provided. The method includes detecting the mask layer by a sensor, the mask layer providing a substrate surface; determining a property of the blind via, the property comprising one or more of a top diameter, a bottom diameter, a volume, or a taper angle; focusing a Gaussian laser beam, under laser process parameters, at the substrate surface to remove at least a portion of the mask layer; adjusting the laser process parameters based on the property; and focusing the laser beam, under the adjusted laser process parameters, to remove at least a portion of the dielectric layer within the volume to form the blind via. The mask layer can be pre-etched. Apparatus for forming a blind via in a substrate are also provided.

The invention relates to a cutting device comprising a femtosecond laser source for emitting a Gaussian laser beam, a shaping system comprising a spatial light modulator for modulating the Gaussian laser beam, an optical scanner for moving the modulated laser beam, an optical focusing system for focusing the modulated laser beam, characterized in that: the optical scanner is configured to scan the modulated laser beam; the treatment device further comprises a control unit for controlling the femtosecond laser source, the shaping system, the optical scanner and the optical focusing system to create a first and a second set of vertical cutting planes (V1, V2) separated from one another by a horizontal cutting plane (H2), the second set of vertical planes (V2) being laterally offset with respect to the first set of vertical planes (V1).

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 provides a light beam shaping device and an optical system, the light beam shaping device comprises a first optical module, and the first optical module comprises a light splitting unit, a delay unit and an imaging unit; the light splitting unit is used for splitting the first light beam into N first split light beams in a first plane and emitting the first split light beams in parallel; the delay unit is arranged on the light emitting side of the light splitting unit and used for enabling the first split light beams to be emitted through different propagation lengths, and the minimum delay value between the emitted first split light beams is larger than or equal to the coherence length of the first light beams; the imaging unit is arranged on the light emitting side of the delay unit and used for imaging the first split light beams emitted through the different propagation lengths, the difference of the longitudinal positions of real images of the first split light beams is smaller than one time of the Rayleigh length, and the transverse positions of the real images of the first split light beams are overlapped. Through the light beam shaping device and the optical system provided by the invention, the problem that the existing Gaussian laser beam is not suitable for thin film processing is particularly solved.

The invention relates to laser beam shaping, intended to achieve a controlled intensity distribution, typically a flat-topped distribution, by means of a plurality of laser beam sources having a non-uniform beam intensity distribution (incident Gaussian laser beam in the visible, infrared or ultraviolet spectrum or other higher-order multi-transverse mode). The laser beam homogenization-expander uses a primary beam shaper element or light pipe (light integrator), and a second beam shaper unit or microlens array (MLA), i.e., a second light integrator defining a flat-topped intensity distribution output, to provide a second homogenization level. The invention also includes several optical devices, such as a light diffuser, a mirror, a dichroic filter, a beam shaping lens, a light pipe, and a microlens, to achieve good homogenization at the desired output angle. The invention is designed as a laser source that fully integrates / mixes one or more wavelengths, such as red, green and blue, but can also integrate other wavelengths in the visible / invisible spectrum. If multiple wavelengths are used as the initial laser source, the light engine output can provide good homogenization and color mixing with little noticeable speckles, near flat-topped intensity distribution, and also no visible hot spots or interference patterns. The invention can be used in many applications, such as microscopes, material processing, fluorescence, lighting devices, holography, fiber coupling, and the like, which require the spectral characteristics (narrowband, monochromaticity) of the laser, but at the same time require a uniform distribution of the intensity.

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.

Disclosed are an apparatus for manufacturing a display device for exposing an exposure region of a photoresist layer disposed on a substrate and including a laser section for irradiating a plurality of Gaussian laser beams to the exposure region, the plurality of Gaussian laser beams overlap in the exposure region as an overlapping laser beam having a Gaussian distribution of energy intensities, the exposure region includes a first region and a second region surrounding the first region, and the energy intensities of the overlapping laser beam in the first region and the second region are different from each other.

The present invention provides an optical system for atomic interferometric Raman laser pointing manipulation, comprising: a laser introduction fiber, a first lens group, a reflector, a second lens group, and an ultra-high vacuum cavity. The laser introduction fiber provides an incident light beam. The first lens group is positioned on one side of the laser introduction fiber along the optical path of the incident light beam, and is configured to output a Gaussian beam of approximately parallel light. The reflector is positioned between the first lens group and the second lens group, and is configured to reflect the Gaussian beam to the second lens group. The ultra-high vacuum cavity is positioned on the side of the second lens group facing away from the reflector. The output light from the second lens group is directed into the ultra-high vacuum cavity, where it coincides with the atomic clusters within the ultra-high vacuum cavity. This optical system can accurately measure target physical quantities, achieve high-performance manipulation of Raman laser pointing, and maintain constant position between the light beam and the atomic clusters during laser pointing manipulation, thereby generating a Gaussian laser beam with desired characteristics and facilitating assembly and manufacturing.

The present application relates to a kind of optical systems for laser beam shaping, including gradient refractive index glass structure piece, the cylindrical body in the middle of the gradient refractive index glass structure piece, one end is wedge angle surface, the other end is convex cylindrical surface, the wedge angle surface of the gradient refractive index glass structure piece is towards laser light source, single-mode Gaussian laser beam emitted by the laser light source is divided into two laser beams with a certain angle after reaching wedge angle surface, laser beam is converged into collimated light beam from divergence in gradient refractive index glass structure piece to reach convex cylindrical surface, and convex cylindrical surface focuses collimated light beam, and two laser beams with a certain angle are focused and superimposed simultaneously, to realize the shaping of the original Gaussian distribution laser. The optical system is simple in structure, small in size and low in realization cost.

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 application discloses a light-off-axis digital holography zero-order term elimination reconstruction method based on symmetrical deflection of reference light. Two object parameter angles are calculated, which make the +1 order terms of two holographic spectrum diagrams separate from each other and do not interfere with each other; the holographic diagram of the measured object is collected by twice adjusting the angle of the reference light without changing the angle of the object light; a composite spectrum diagram and a binary mask are obtained through holographic diagram processing; the target spectrum diagram is obtained according to the binary mask combined with the composite spectrum diagram, and the +1 order spectrum information is extracted to reconstruct the image of the measured object. The application utilizes the light intensity symmetry of the Gaussian laser beam, and the two light-off-axis holographic diagrams obtained by symmetrical deflection of the reference light beam are subtracted, so that the holographic diagram eliminating the zero-order spectrum can be obtained, and the imaging artifacts caused by the spectrum aliasing of the zero-order term can be suppressed while improving the frequency domain bandwidth utilization rate of the holographic optical system.

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.

To provide a manufacturing apparatus for a display device and a manufacturing method for a display device.SOLUTION: The present invention discloses a manufacturing apparatus for a display device for exposing a light-exposure region of a photoresist layer disposed on a substrate. The light-exposure region includes a laser part that delivers a plurality of Gaussian laser beams. The Gaussian laser beams overlap an overlap laser beam whose energy intensity has a Gaussian distribution in the light-exposure region. The light-exposure region includes a first region and a second region that surrounds the first region. The energy intensity of the overlap laser beam is different in the first region and the second region.SELECTED DRAWING: Figure 1

The invention discloses a flat-topped beam multichannel adaptive fusion gas detection method in the technical field of gas detection, which comprises a laser emission module, and the gas detection method comprises the following steps: step 1, the laser emission module emits 2004nm modulation laser (generally wavelength scanning or frequency modulation); 2, after receiving the laser, a beam processing module segments the laser, and finally outputs a flat-topped beam with highly uniform light intensity distribution; 3, after the flat-topped light beams penetrate through the gas to be detected in the flue, the flat-topped light beams are received by a signal receiving unit and processed by a data processing unit; according to the invention, a flat-topped light beam with spatial uniform intensity distribution is introduced to replace a traditional Gaussian laser beam, and a self-adaptive optical modulation system and a multi-channel signal processing algorithm are combined, so that the influence of light intensity fluctuation on a measurement result can be remarkably reduced when the light beam is shielded by local particulate matters in a light beam transmission process; therefore, the stability and the reliability of the detection system are improved, and the system is suitable for an online gas monitoring system in an open environment.

The invention relates to the technical field of additive manufacturing, and provides a Boss column additive manufacturing method which is used for manufacturing a Boss column and adopts a multi-beam laser and coaxial wire feeding process. Wherein the multiple beams of laser are configured to be capable of achieving gradient control and dynamic adjustment of energy distribution, so that a directional solidification field based on the temperature difference gradient is established in the molten pool. The multiple laser beams include Gaussian laser beams and flat-topped laser beams, and the Gaussian laser beams and the flat-topped laser beams are coherently superposed to form an interference laser field. According to the Boss column additive manufacturing method, the material utilization rate can be increased, the machining efficiency is improved, and the cost is reduced.

The invention discloses a laser additive manufacturing method for a high-density low-defect molybdenum-rhenium alloy part. The method comprises the steps that firstly, molybdenum-rhenium alloy spherical powder is prepared from a molybdenum-rhenium alloy raw material bar prepared through a powder metallurgy method through a plasma rotating electrode atomization method; secondly, laser additive manufacturing equipment with a high-temperature platform and a beam shaping system is used, the molybdenum-rhenium alloy spherical powder serves as a raw material, laser powder bed melting additive manufacturing is conducted, and a molybdenum-rhenium alloy printed piece is obtained; and thirdly, the molybdenum-rhenium alloy part is obtained through hot isostatic pressing treatment. Molybdenum-rhenium alloy spherical powder high in sphericity degree and low in oxygen content is prepared through a plasma rotating electrode atomization method, a powder laying base plate is preheated through a high-temperature platform, an annular laser beam is adopted for replacing a Gaussian laser beam, a heat management partition scanning strategy and heat treatment after hot isostatic pressing are adopted, and the spherical molybdenum-rhenium alloy powder is obtained. Cracking and cracking phenomena in the laser additive manufacturing process are reduced, the high-density and low-defect molybdenum-rhenium alloy part is obtained, and the molybdenum-rhenium alloy part is suitable for a reactor core structure material and a cladding material in a space reactor.