33 results about "Gaussian laser beam" patented technology

The invention relates to the technical field of micropore machining, and discloses a laser micropore machining method for a transparent workpiece, the workpiece is transparent relative to laser, and the laser micropore machining method comprises the following steps that S1, a Gaussian laser beam is provided; s2, the Gaussian laser beam is shaped and focused, a multi-focus light beam is formed and acts on the interior of the workpiece, and the space track of the multi-focus light beam comprises a main track vertical line extending in the axial direction of the needed micropore, a chamfering line connecting the main track vertical line and the surface of the workpiece and an auxiliary line located on the radial inner side of the main track vertical line; one end of the auxiliary line intersects with the main track vertical line, and the other end extends to the surface of the workpiece; s3, the multi-focus light beam is controlled to rotate around the axis of the needed micropore by one circle, and a space modification face is formed in the workpiece; and S4, carrying out etching treatment on the modified workpiece. According to the laser micro-hole machining method, the technical problems that a traditional micro-hole machining mode is low in machining efficiency, a milling cutter is prone to breakage, and consequently cost is increased, and the yield is low are solved.

The invention discloses a wide-area high-gain laser homogenizing and beam expanding method and device. The device comprises a first lens, a second lens and a third lens. The method comprises the following steps: acquiring Gaussian laser beams and performing first centralized processing through a convex lens to obtain first centralized Gaussian laser beams; converging the Gaussian laser beams in the first set through a convex lens to obtain Gaussian laser beams in a second set; and performing beam expanding and homogenizing treatment on the Gaussian laser beams in the second set, and outputting the flattop laser beams after beam expanding. According to the invention, the uniformity of the Gaussian beam in light intensity distribution can be improved, and the beam expanding distance and the expanding multiple of the original beam can be improved. The wide-area high-gain laser homogenizing and beam expanding method and device can be widely applied to the technical field of laser shaping.

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).

The invention relates to the technical field of micropore machining, and discloses a method for conducting laser micropore machining on a transparent workpiece, the workpiece is transparent relative to laser, and the method comprises the following steps that S1, a Gaussian laser beam is provided; s2, the Gaussian laser beam is shaped and focused, and a multi-focus light beam is formed and acts on the interior of the workpiece; s3, the multi-focus light beam is controlled to move along the contour path of the needed micropore, and a continuous space modification face is formed in the workpiece; s4, a first space modified surface with an outer chamfer feature and a second space modified surface with an inner chamfer feature are machined in the workpiece, and the modified workpiece is obtained; and S5, the modified workpiece is subjected to etching and splitting treatment, and micropore forming of the workpiece is achieved. According to the laser micro-hole machining method, the technical problems that a traditional micro-hole machining mode is low in machining efficiency, a milling cutter is prone to breakage, and consequently cost is increased, and the yield is low are solved.

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 relates to laser beam shaping, intended to achieve a controlled intensity profile distribution, typically a flattop distribution, by means of a plurality of laser beam sources having a non-uniform beam intensity distribution (incident Gaussian laser beams or other higher order multi-lateral modes in the visible, infrared or ultraviolet spectrum). The laser beam homogenizer-expander splits the incident beam into sub-beams along the primary optical axis using a first beam shaping element and uses a second beam shaping element, i.e., a second optical integrator, which defines a flat-topped intensity distribution output, thereby providing a second homogenization stage. The invention also comprises a plurality of light diffusers (F1, F2), mirrors, filters (D1, D2) and output lenses (L1, L2, L3) to achieve good homogenization at the desired output angle, which will be described hereinafter in detail. The invention is directed to fully integrating / mixing laser sources of one or more wavelengths, such as red, green and blue, but may also integrate other wavelengths in the visible / invisible spectrum. If multiple wavelengths are used as the initial laser source (LSI), the output of the light engine can provide good homogenization and color mixing, little noticeable spots, near flat-topped intensity distribution, and no visible hot spots or interference patterns. The invention can be used in many applications, such as microlenses, material processing, fluorescence, lighting fixtures, holography, fiber coupling, and the like, which require the spectral characteristics (narrowband, monochromatic) of the laser, but at the same time require a uniform distribution of the intensity.

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 multi-energy-field heating device and method for restraining high-strength alloy from cracking in the printing process, and the device comprises a printing substrate which comprises a working face used for bearing a printed piece; the preheating mechanism is used for heating the printing substrate; the first laser source is used for applying a Gaussian laser beam to the working face so as to form a first light spot on the working face, and the first light spot is used for fusing printing powder for printing forming; the second laser source is used for applying a flat-topped laser beam to the working face so as to form a second light spot on the working face, the diameter of the second light spot is larger than that of the first light spot, and the second light spot completely covers the first light spot; wherein the first laser source and the second laser source move synchronously to ensure that the second light spot covers the first light spot in real time, and the second light spot comprises a preheating area located in front of the movement direction of the first light spot and a heat preservation area located behind the movement direction of the first light spot. According to the method, the temperature gradient is effectively slowed down, and the defects of holes, cracks and the like caused by a high-gradient temperature field and the unbalanced precipitation brittleness problem are avoided.

The present invention discloses a fiber concave mirror processing device and method. The device of the present invention comprises a laser, a first focusing lens, a second focusing lens, a third focusing lens, a microscope and a three-dimensional displacement platform. The laser, the first focusing lens, the second focusing lens and the third focusing lens are sequentially arranged along the optical path. The laser can emit a Gaussian laser beam. The first focusing lens and the second focusing lens collimate and expand the Gaussian laser beam emitted by the laser. The third focusing lens focuses the collimated and expanded Gaussian laser beam. The three-dimensional displacement platform is located at the focus of the Gaussian laser beam and is used to carry and move the optical fiber. The microscope is located above the three-dimensional displacement platform and is used to observe the optical fiber position and the marking spot position. The present invention has simple process, high precision and low cost.

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 systems and methods disclosed herein utilize a beam-forming system configured to convert a Gaussian laser beam into an annular vortex laser beam having a relatively large depth of focus, which enables the processing of thick or stacked glass-based objects annular laser beam is defined in part by a topological charge m that defines an amount of rotation of the annular vortex beam around its central axis as it propagates annular vortex beam is used to form micro-holes in a glass-based object using either a one-step or a two-step method micro-holes formed by either process can be in the form of recesses or through-holes, depending on the application size of the micro-holes can be controlled by controlling the size of the annular vortex beam over the depth of focus range.

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.

The utility model provides a fiber beam combining device and a laser, and relates to the technical field of laser equipment. The fiber beam combining device includes a first fiber laser, a second fiber laser, a first laser beam combiner, and a second laser beam combiner. A plurality of first fiber lasers are used to generate Gaussian laser beams, a plurality of second fiber lasers are used to generate ring laser beams, the first laser beam combiner can fuse a plurality of first sub-fibers to the first fiber, the second laser beam combiner can combine to form a combined laser, the first fiber and a plurality of second fibers are respectively coupled to transition fibers, and the diameter gradually increases from the transition fiber to the output fiber. The first laser beam combiner of the utility model is used to fuse a plurality of first sub-fibers to the first fiber, and then couple the first fiber and the second fiber, and adopt a step-by-step fusion coupling method to form a combined laser and output it, so as to reduce signal loss, reduce heat accumulation caused by combining, and reduce the cladding light existing in the output fiber.

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 present invention relates to the field of laser detection technology and discloses a Gaussian laser beam divergence angle measurement device and method. The method comprises: passing the laser beam to be measured through a polarization beam splitter prism, being incident normally on a volume phase grating and a quarter-wave plate, and being split into three light spots with light intensities of approximately 0.25:0.5:0.25. The light is then reflected by a reflector, passed again through the quarter-wave plate and the volume phase grating, and reflected by the polarization beam splitter prism to a CCD camera. By varying the distance from a reflector with a movable mirror frame to the volume phase grating, the proportion of the zero-order light spot intensity in the total light spot intensity at different distances x0 is obtained. The divergence angle of the laser beam to be measured is then fitted using a formula based on the relationship between the intensity proportion of the zero-order light spot and the beam divergence angle.

A system and method for generating X-rays by delivering a series of laser pulses having non-Gaussian intensity profiles and various polarizations onto a target material, thereby generating a plasma on the target material and accelerating electrons within the plasma to produce X-rays. In a sample configuration, the system includes a laser source, optical elements for modulating the laser beam, and a target material housed in a vacuum chamber. The laser source can be an Ytterbium laser with specific repetition rates and pulse durations, and the optical elements can include lenses, waveplates, and spatial light modulators, among others. The target material can be a liquid metal, solid metal, liquid, or gas, and the laser pulses can be generated by multiple laser beams with different wavelengths.

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 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 discloses an annular multi-reflection gas chamber. The annular multi-reflection gas chamber comprises an annular structure, the concave inner wall of the annular structure defines an annular gas chamber for being filled with atmosphere to be measured, and the concave inner wall of the annular structure is made of a reflection material; an incident hole is formed in the annular structure, and an emergent hole is formed beside the incident hole; a collimated Gaussian laser beam with a target width enters the annular structure from the incident hole, is reflected by the concave inner wall of the annular structure for multiple times, and then is emitted to a receiving detector from the emergent hole; and at each reflection, the collimated Gaussian laser beam is dispersed and expanded by the concave inner wall of the annular structure. The optical path of the gas chamber designed by the invention can reach the same optical path as that of mirror reflection, but is free from adjustment, high in anti-interference capability and low in material cost.