188 results about "Short pulse laser" patented technology

The invention discloses a rigid-flex circuit board slotting process based on a laser depth control technology. The rigid-flex circuit board slotting process comprises the steps that the surface of a rigid layer of a rigid-flex circuit board is pretreated, and a laser sensitive layer is sprayed; cNC depth-controlled milling is adopted to form a grooved rough blank structure on the surface of the pretreated rigid layer; positioning laser is used for scanning, a three-dimensional model is established through collected reflected signals, then layered depth-controlled ablation is conducted, second-power laser is sequentially adopted for fine cutting, third-power laser is sequentially adopted for depth calibration, and a groove body structure is formed; cleaning an interface, scanning a groove bottom area and synchronously introducing low-temperature gas; performing morphology repairing treatment, and generating a periodic micro-nano structure on the groove wall by adopting short pulse laser to form a stress concentration resistant surface; depositing an insulating medium layer, and forming a continuous packaging protection layer on the groove wall and the bottom through a vacuum coating process; the high-precision depth-controlled slotting of the rigid-flex circuit board is realized, and meanwhile, the ultra-low thermal damage and anti-fatigue structure and long-acting environmental stability are realized.

The present invention provides a method and apparatus for laser stripping a silicon carbide ingot. The method first transmits an ultrashort pulse laser beam through the first end face of the silicon carbide ingot and focuses it on a set depth layer of the ingot. A cavity-modified region and a crack-modified region are generated above the set depth layer, respectively, and scanned to form the cavity-modified layer and the crack-modified layer. A short pulse laser beam then transmits the second end face of the silicon carbide ingot and focuses it on the cavity-modified region. The beam scatters and propagates within the cavity-modified region, causing the heat from the short pulse laser beam to act on the cavity-modified region, causing cracks within the crack-modified region to grow laterally outward. Scanning is then performed to connect cracks within adjacent cavity-modified regions within the cavity-modified layer through lateral growth. This reduces the amount and length of cracks in the modified layer extending longitudinally along the silicon carbide ingot, increases the number and length of lateral crack growth, reduces cutting loss, and reduces waste.

The invention belongs to the technical field of optics, and particularly relates to a terahertz radiation source system of an air plasma antenna, which comprises a laser, an air plasma generation unit, a terahertz radiation generation unit, a terahertz waveguide and transmission system, a detection analysis unit and a control synchronization system, the laser device is a high-power femtosecond laser device and is used for generating ultra-short pulse laser, the pulses can excite plasma in the air, and the problem that a traditional photoconductive antenna terahertz source is low in terahertz radiation intensity due to limitation of a material damage threshold value is solved; the bandwidth of terahertz radiation can be regulated and controlled by adjusting the distance between the plasma antennas, and the interval time of switching on the plasma antennas can be controlled by controlling the delay time of the third beam of laser, so that the regulation and control of the terahertz wave intensity are realized.

The invention discloses a nickel-based alloy additive manufacturing method for high-frequency ultrasonic dynamic forging printing. The method comprises the steps that nickel-based alloy powder and a base plate are pretreated; scanning the nickel-based alloy powder layer by layer through laser to form a molten pool; in the machining process of each layer, when the temperature of the molten pool ranges from 1000 DEG C to 1400 DEG C, ultrasonic waves are activated to generate compound vibration; the composite vibration comprises axial vibration and transverse vibration; when the ultrasonic vibration phase difference reaches a preset first interval, short pulse laser is triggered; the ultrasonic vibration phase difference is a phase deviation between an ultrasonic vibration waveform and a pulse laser shock triggering moment; and until all layers are machined, a formed part is obtained. According to the scheme, the dislocation density is improved, secondary grain refinement and bubble escape are achieved, and interlayer stress redistribution is made uniform.

The invention belongs to the technical field of photoelectric countermeasure, and particularly relates to a CMOS detector damage system based on time-domain composite pulse laser, which comprises a time-domain composite pulse laser generation module, a light beam transmission and focusing module, a target damage monitoring module, a parameter optimization control module and a detector to be damaged. The time domain composite pulse laser generating module comprises a short pulse laser, a long pulse laser, a pulse synchronous controller, a power adjusting unit, a power supply module and a cooling device, and the power adjusting unit is electrically connected with the short pulse laser and the long pulse laser; and the power supply module is electrically connected with the long pulse laser, the short pulse laser and the cooling device. According to the method, energy loss generated by plasmas in a traditional laser damage method is avoided, the damage efficiency is remarkably improved, efficient transmission and concentration of energy in the multilayer structure are achieved through the synergistic effect of long pulses and short pulses, all layers of materials synchronously lose efficacy in a short time, and the damage consistency of the whole multilayer structure is ensured.

The invention relates to the field of material surface treatment, and discloses a silica gel and metal combined treatment process which comprises the following steps: S1, ultra-short pulse laser is adopted to machine a three-dimensional micro-nano composite structure on the surface of a titanium alloy, the structure comprises a periodic groove array and surface nano holes, and the surface roughness Ra of the titanium alloy is larger than or equal to 5 microns; and S2, a titanium nitride transition layer and a siloxane self-assembly molecular layer are sequentially formed on the roughened titanium alloy surface through atomic layer deposition, and a gradient chemical interface is formed. According to the method, the micro-nano composite structure is processed through ultra-short pulse laser, the interface mechanical embedding area is remarkably increased, the two-dimensional rough limitation of a traditional sand blasting process is broken through, deep barb-shaped anchoring is achieved, the anti-stripping capacity is greatly enhanced, gradient chemical bonding is formed by the atomic layer deposition titanium nitride transition layer and the amino self-assembly molecular layer, and the anti-stripping performance is improved. The thermal expansion difference is effectively buffered, and the interface high-temperature resistance is improved.

The invention relates to the technical field of lamps, in particular to a plating forming process of a lamp. The problems that the interface bonding force of the coating and the matrix is insufficient and the corrosion resistance of the coating is poor are solved. According to the method, micro-arc oxidation is carried out in the pretreatment stage, a compact Al-Si-O ceramic layer is generated on the surface of a high-aluminum matrix in situ, and in combination with deep diffusion of plasma siliconizing, a transition area with gradient Si distribution is constructed; the pitting corrosion resistance of the coating is optimized through the component gradient design of the inner-layer coating, the middle-layer coating and the outer-layer coating; the surface of the coating lamp is subjected to checkerboard scanning by using short pulse laser, so that the porosity and microdefects of the surface of the coating are improved, and the corrosion resistance of the coating is enhanced; a uniform oxynitride passivation film is generated on the surface of the coating in situ through low-temperature plasma post-oxidation-nitridation treatment, the defect that a film layer is easy to strip in a traditional passivation process is avoided, and the corrosion resistance of the material in long-term service can be stably maintained.

The invention relates to the technical field of anti-counterfeiting mark manufacturing and detection, in particular to a white spirit bottle cap anti-counterfeiting mark manufacturing method based on laser miniature carving and a detection device.The white spirit bottle cap anti-counterfeiting mark manufacturing method comprises the steps that S1, on the basis of the micro-nano optical principle, micro-nano structure parameters containing periodic grooves and protrusions are generated through algorithm optimization; s2, according to the micro-nano structure parameters, an engraving path file matched with ultra-short pulse laser equipment is generated; when the white spirit bottle cap anti-counterfeiting mark is used, through the micro-nano structure design and multi-angle dynamic information display, the anti-counterfeiting mark has extremely high complexity and uniqueness, the counterfeiting difficulty and the counterfeiting cost are greatly increased, the anti-counterfeiting performance of the white spirit bottle cap can be improved, the dynamic change characteristics of the anti-counterfeiting mark are captured through multi-angle imaging, and the anti-counterfeiting mark has good anti-counterfeiting effect. The micro-nano spectrum analysis module detects the authenticity of the micro-nano structure from the microscopic level, and the micro-nano spectrum analysis module and the micro-nano structure complement each other, so that the accuracy and reliability of detection can be remarkably improved, and the possibility of misjudgment and missed judgment can be reduced.

The invention discloses a method and device for optimizing metal powder laying additive manufacturing, the method comprises the steps that optical fiber beam combination is conducted on short pulse optical fiber laser and continuous optical fiber laser which are the same in wavelength to form a composite light source, and the pulse width of the short pulse optical fiber laser is the nanosecond level or the subnanosecond level; the composite light source is output to the galvanometer module through the beam combining optical fiber and then acts on the metal powder bed, and the low-cost and high-efficiency method of full coaxiality and concentricity of lasers of different light sources through the beam combining optical fiber is adopted, so that the printing stability, reliability and large-area uniformity are guaranteed; the short pulse laser and the continuous laser act on an irradiation metal area synchronously and coaxially all the time in the scanning process, metal powder bed melting manufacturing under the force oscillation effect is achieved, and the stability of a keyhole in the additive manufacturing process is improved. According to the method, the pore forming probability of laser powder laying sintering three-dimensional forming can be greatly reduced, the comprehensive mechanical property of a printed piece is improved, and wide popularization and application prospects are achieved.

The invention discloses a femtosecond laser three-dimensional pumping detection imaging method, which belongs to the technical field of ultrafast laser observation, and particularly comprises the following steps of: generating a laser pulse by using an ultrashort pulse laser, splitting the laser pulse by using a beam splitter to generate two beams of pulse light, namely pumping light and detection light, ablating a material by using the pumping light as an excitation source, reflection or transmission imaging is realized at different moments after the probe light passes through the time delay table; a detection angle is freely adjusted in space around a sample to be detected by rotating the light path propagation system, and a detection mode is switched between a reflection mode and a detection mode by rotating the imaging system; a multi-angle two-dimensional transient image is fused into a three-dimensional graph, plasma and a double-temperature model are expanded, the electronic dynamic characteristics of three-dimensional space distribution and the plasma eruption process can be calculated in an ultrafast scale, and three-dimensional information of a femtosecond laser ablation material is reduced. The problem that an existing imaging method cannot achieve three-dimensional imaging of the femtosecond laser processing ultrafast process at any angle in the space is solved.

Disclosed is an optical system for laser machining that enables simpler and more reliable machining of several patterns simultaneously on the same part. The system comprises an ultra-short pulse laser source for generating a source laser beam; a device with a separation means for separating a source laser beam into a plurality of separated laser beams, such that each of the separated laser beams is directed in a direction of propagation specific thereto; a spatial offsetting unit for obtaining, from the plurality of separated laser beams, a plurality of offset laser beams such that each offset laser beam can propagate around a main axis of propagation A specific thereto and is capable of describing a movement around the main axis of propagation A; and a focusing means configured to focus each offset laser beam on a workpiece in the direction of the axis of propagation specific thereto.

The application belongs to the technical field of semiconductor power devices, and particularly discloses a method for laser stripping gallium oxide. The method is characterized in that a super-short pulse laser with a predetermined wavelength is irradiated into the gallium oxide, and a two-photon absorption process occurs when the laser is focused at a position with a specific thickness from the surface. The high temperature generated in the process causes thermal decomposition of the gallium oxide, thereby achieving the purpose of stripping the gallium oxide. Compared with the traditional substrate cutting technology, the stripping method can significantly reduce the cutting consumption of the gallium oxide substrate, and the cut substrate can be reused after polishing, which helps to reduce the manufacturing cost of the gallium oxide device.

Systems, methods, and programs for detecting and removing defects on a part during laser powder bed fusion manufacturing are described. A sensor may detect defects on the part during manufacturing of the part. A controller may obtain the sensor data and determine the defect and control a short-pulse laser to remove the defect. Furthermore, processes of manufacture and material properties of the part may be evaluated to determine a likelihood of a defect and the short-pulse laser may be operated to reduce the likelihood of the defect. Furthermore, the short-pulse laser may be operated to reduce stress in layers of the part.

The invention provides a controllable processing method for a photoetching single crystal optical fiber multi-ring cladding based on femtosecond laser and a multi-ring mask plate. The technical bottlenecks that in the prior art, the processing efficiency is low, the processing length is limited, and the structural precision is insufficient are effectively solved. The core of the method is that high-energy ultrashort pulse laser generated by a femtosecond laser is combined with a spatial light modulation technology of a programmable multi-ring mask plate to generate multi-layer femtosecond laser spots in specific annular distribution. Micron-scale focusing of multi-ring femtosecond laser beams can be achieved through a precisely-designed optical system, and precise spatial selective refractive index modulation is achieved on the cross section of the single-crystal optical fiber. Compared with a single-crystal optical fiber with a single-multi-ring annular cladding structure, the multi-ring annular cladding structure can further enhance the suppression capability of the multi-ring annular cladding structure on a high-order mode, realizes flexible regulation and control of a light wave transmission mode field, effectively reduces the influence of a multi-mode interference problem in the single-crystal optical fiber on the signal quality, and improves the signal quality. The stability of signal transmission and the quality of sensing signals are improved, and the application requirements of different scenes are met.

Methods and systems for the generation of non-lethal and lethal effects using ultra-short pulse lasers. A laser source generates pulses at the direction of a controller and directs the pulses along an optical path to one or more high-speed beam steering devices, also directed by the controller, which then directs the laser pulses to achieve the desired effects. A computerized controller receives a specification of one or more desired effects for one or more targets and calculates a distribution of ultra-short laser pulses as well as the required characteristics for each of the pulses.

The invention discloses a high-temperature-resistant metal honeycomb equipment forming method which comprises the following steps: S1, performing blanking calculation, extracting a single corrugated plate in a metal honeycomb core body, and unfolding the single corrugated plate according to an equal length principle so as to determine size parameters of a pre-connected area and a to-be-stretched area; s2, chemical oil removal is conducted, specifically, the surface of the metal foil is treated, stains and oxide films on the surface of the metal foil are removed, the subsequent resistance welding strength is improved, and the situation of welding breakage during stretching is avoided; s3, surface activation is conducted, specifically, a mechanical-chemical synergistic process is adopted, silicon carbide abrasive paper is adopted for polishing the metal foil, the surface roughness Ra value of the metal foil is reduced, the specific surface area is increased, the contact angle is reduced, and finally drying treatment is conducted; and S4, material cutting is conducted, specifically, an ultra-short pulse laser cutting technology is adopted for metal foil machining, and the allowance of 10 mm is reserved so that the foil can be fixed. The stretching parameters can be flexibly adjusted according to different curvature requirements, and the preparation problem of the honeycomb core in a complex shape is successfully solved.

The application discloses a disk medium high-energy ultra-short pulse laser regenerative amplifier based on CPA technology, comprising: a femtosecond laser seed light source for providing femtosecond seed light; a chirped Bragg fiber grating for expanding the femtosecond seed light into nanosecond laser pulses; an optical coupling input and output device for coupling input of the nanosecond laser pulses and coupling output of the nanosecond laser pulses after amplification processing; a regenerative amplification laser cavity for regenerative amplification processing of the coupled-in nanosecond laser pulses; the optical coupling input and output device comprises a fiber coupling collimation module, an optical isolator, a first 1 / 2 wave plate and a thin film polarizer; the regenerative amplification laser cavity comprises a Pockels cell, a second 1 / 2 wave plate, a first reflection module, a second reflection module, a first telescope module, a second telescope module, a first disk gain medium, a second disk gain medium and a third reflection module; the regenerative amplifier can realize high-repetition-frequency and high-pulse-energy laser pulse output.

A method for measuring the effective spot area of ​​a short pulse Gaussian beam in a vacuum environment comprises a pulse laser, a shutter, an energy regulator, a focusing lens, a sampling mirror, a metal target, a sample stage, an energy meter, a computer, and a vacuum chamber. The method is based on the correlation between the damage profile of the metal target and the energy distribution characteristics of the Gaussian beam. By measuring the change of the corresponding area of ​​the damage profile on the metal target (106) with the irradiated laser energy, the effective spot area of ​​the short pulse laser Gaussian beam at the focus position in the vacuum environment is obtained by fitting. The method is simple and feasible, and can accurately measure the effective spot area of ​​a short pulse laser at different incident angles in a vacuum environment.

The utility model relates to an acousto-optic mode locker capable of improving working frequency and diffraction efficiency, and belongs to the field of photoelectrons. The acousto-optic mode locker comprises an acousto-optic medium which adopts a quartz crystal, the X axis of the quartz crystal serves as an ultrasonic transmission direction, the Y axis serves as a light transmission direction, and the Z axis serves as an optical axis and is perpendicular to the light transmission direction; two parallel polished surfaces are arranged in the X-axis direction of the quartz crystal, one polished surface serves as a sound transmission surface, a welding layer is arranged on the sound transmission surface, a transducer is mounted on the welding layer, and a surface electrode is arranged on the transducer; and the other polished surface is used as an ultrasonic reflecting surface. Fused quartz is replaced by the high-purity quartz crystal, and the tangential direction of the quartz crystal is optimized, so that the influence of the optical rotation of the quartz crystal on the mode-locked laser is reduced to the minimum. The sound wave attenuation coefficient of the quartz crystal is lower, and the acousto-optic merit figure is higher, so that the working frequency and diffraction efficiency of the acousto-optic mode locker can be greatly improved, and the development requirement of an ultra-short pulse laser towards a smaller size is met.

The present invention provides an optical member and a method for manufacturing the same, the method comprising: a removal step for partially removing an antireflection film having a multilayer structure in which a low-refractive-index layer and a high-refractive-index layer are laminated, the antireflection film being formed so as to cover an optical surface of an optical substrate, by irradiation with an ultra-short pulse laser light, and performing non-heat processing on the antireflection film by irradiation with an ultra-short pulse laser light to form an antireflection film having a multilayer structure in which a low-refractive-index layer and a high-refractive-index layer are laminated; the pulse width of the ultra-short pulse laser is 0.1 picosecond or more and less than 100 picoseconds, and in the removal step, the ultra-short pulse laser is irradiated to remove the low refractive index layer, which is the outermost layer of the multilayer structure, or the low refractive index layer, which is the outermost layer, and the conductive layer, which is a layer immediately adjacent to the low refractive index layer. The non-heating processing is a processing for suppressing thermal damage to the high refractive index layer, which is a lower layer of the conductive layer, and the processing for suppressing thermal damage is a processing in which the ratio t1 / t2 of the thickness t1 of a portion removed by the removal step to the thickness t2 of a portion not removed in the high refractive index layer is within the range of 0.90-1.00.

The disclosure relates to an optical system comprising a laser source (1) which generates pulsed laser radiation consisting of a temporal sequence of laser pulses in an input laser beam (EL), a splitting element (2) which follows the laser source (1) in the course of the beam and splits each of the laser pulses into laser pulse replicas separated spatially and / or temporally from one another, a combination element (4) which follows the splitting element (2) in the course of the beam and superimposes the laser pulse replicas in a respective laser pulse in an output laser beam. It is the task of the disclosure to provide an improved optical system compared to the prior art. It should be possible to generate particularly short and thus spectrally broadband laser pulses of high power with the optical system. The disclosure proposes that at least one multipass cell (3) is arranged in the beam path between the splitting element (2) and the combination element (4), through which the laser pulse replicas propagate, wherein the multipass cell (3) contains a medium in which the laser pulse replicas undergo nonlinear spectral broadening.

The invention provides an ultrashort pulse laser ceramic grading method and equipment for realizing the method. The method comprises the following steps: a) adopting an ultrashort pulse laser beam which is generated by a specific SESAM passive mode-locking seed laser and a regenerative amplifier and has the pulse width of 1-15 ps and the monopulse energy of 10 mu J-1 mJ; b) focusing the ultrashort pulse laser beam into a processing light spot with the light spot diameter of 5-50 microns through a light beam shaping transmission module; c) controlling the focused laser beam to perform grain-dividing path processing on the surface of the ceramic workpiece at a scanning speed of 10-1000 mm / s to realize grain-dividing joint cutting with a depth-to-width ratio of more than 10: 1; according to the method, the energy difference between single pulses is smaller than or equal to + / -2%, the difference of peak power between the pulses is smaller than or equal to + / -3%, and the method is stable in working performance, high in consistency, short in action time / low in damage and high in machining precision.

The present invention relates to a method and apparatus for processing a workpiece (4), in particular to a method and apparatus for imprinting an anti-glare function through a laser pulse (100) of a laser (1), wherein the apparatus comprises: a laser (1), in particular a short pulse laser or an ultrashort pulse laser, configured to provide a laser beam (10) including a laser pulse (100); a first diffusion lens (2) and a second diffusion lens (2'), each configured to scatter the laser beam (10) and imprint a locally randomized intensity distribution on the laser beam (10) at a focal plane (12), wherein the first diffusion lens (2) and the second diffusion lens (2') sequentially scatter the laser beam (10); and at least one optical focusing system (3) configured to focus the laser beam (10) onto a focal area (120) within a focal plane (12) on the workpiece (4), wherein the laser beam (10) is applied to the workpiece (4) and consequently the workpiece is processed. The invention includes a progression device (5) configured to move a laser beam (10) and a workpiece (4) by one step (V) relative to each other, wherein the progression device includes a scanner device (50) having a first scanner element (500) and a second scanner element (502), the movement of the scanner elements (500, 502) generates one step, the second scanner element (502) includes a second diffusion lens (2'), and the movement of the scanner elements changes a locally randomized intensity distribution.

The invention discloses an ultra-short pulse laser welding method for a YAG crystal and a metal heat sink, and belongs to the field of ultra-short pulse laser welding. The invention aims to overcome the defect that the existing YAG crystal and metal heat sink connection process cannot integrate effective heat transfer of an interface, low connection stress and high production efficiency at the same time. The method comprises the steps of 1, pretreatment; 2, assembling a to-be-welded part; and thirdly, ultrashort pulse laser welding is conducted. The ultra-short pulse laser welding method is used for ultra-short pulse laser welding of the YAG crystal and the metal heat sink.

The present application belongs to the technical field of laser and material interaction, and relates to a kind of optical element laser irradiation damage prediction method, system and terminal.The damage prediction method includes: establishing the three-dimensional geometric model of optical element, defining the material attribute parameter and environmental parameter of optical element, and constructing laser energy deposition function;With laser energy deposition function as laser heat source, a three-dimensional transient model of solid heat transfer and solid mechanics bidirectional coupling is constructed, and the boundary conditions of solid heat transfer and solid mechanics are set;Dynamic damage evolution equation is constructed, the laser irradiation surface of optical element is meshed, the solver is configured based on condition criterion, the current damage variable distribution is obtained by solving, the material attribute parameter is updated based on the current damage variable distribution, the damage variable distribution is continuously calculated after updating, until the preset termination condition is reached, and the damage prediction result is obtained.The present application can comprehensively and accurately predict the complex transient physical process of material under the action of high-repetition-rate short-pulse laser.

The invention discloses polycrystalline diamond defect detection and repair equipment and an intelligent repair method. The method comprises the following steps: preprocessing a to-be-processed area of a to-be-detected product, performing excitation scanning, obtaining distribution data of an internal fluorescence signal, and generating a fluorescence signal distribution diagram; carrying out image analysis on the fluorescence signal distribution diagram, identifying and positioning an abnormal fluorescence signal region in the fluorescence signal distribution diagram, constructing a three-dimensional coordinate model according to the abnormal fluorescence signal region, and processing by adopting ultra-short pulse laser processing equipment to form a repair channel; providing a repair alloy, and filling the repair alloy into the repair channel through a directional infiltration technology to realize metallurgical bonding repair of the internal defect area; an optical traceable signal detection mechanism is introduced into a polycrystalline diamond material, and an ultrashort pulse laser micro-channel processing and directional infiltration repairing process is combined, so that positioning and in-situ repairing of internal defects are realized, and the overall mechanical property of the material is effectively recovered; therefore, the service life of the product is obviously prolonged, and the machining reliability is improved.

The invention relates to a real-time on-line ultrafast laser dielectric film damage threshold testing system, which belongs to the technical field of ultrafast laser, and comprises a forward Brillouin compression system for generating forward Stokes light and compressing and amplifying the forward Stokes light; the forward non-focusing SRS compression system is used for generating asymmetrically amplified and compressed laser to obtain high-energy short-pulse laser; the grating film damage threshold testing system is used for bearing the optical dielectric film, receiving the processed laser, enabling the laser passing through the interior to penetrate through a damage point of the optical dielectric film, and calculating a damage threshold according to the laser power density and the light spot area; the phase interference damage judgment system is used for carrying out real-time on-line damage judgment and quantification, generating interference fringes through two beams of light, quantifying the interference fringes and detecting the damage degree of the optical element thin film on line in real time; the method has the beneficial effects that the energy irradiated on the tested grating film sample is calculated according to the beam splitting ratio, and the grating film damage threshold value is calculated.

The invention belongs to the technical field of laser manufacturing, and relates to a method for regulating and controlling an interface between laser reduction deposited metal and a transparent substrate, which comprises the following steps of: coating a precursor material on the surface of the transparent substrate, and irradiating the interface between the precursor material and the transparent substrate by adopting ultrashort pulse laser through the transparent substrate; and the ultra-short pulse laser scans the interface of the precursor material and the transparent substrate for multiple times according to a preset path for laser direct writing, and a patterned metal structure is obtained. The ultra-short pulse laser penetrates through the transparent substrate from the back to irradiate the precursor material / substrate interface, thickness limitation on the precursor material is avoided, and in the multiple laser scanning process, the temperature of the metal / substrate interface exceeds the chemical bond fracture and recombination temperature, so that more chemical bonds are formed on the two sides of the transition layer, and the performance of the transition layer is improved. The chemical bonding degree of a metal / substrate interface is improved, interface regulation and control of the metal and the transparent substrate are achieved, and a patterned metal structure is obtained.

The invention relates to a laser etching metal model establishing method considering short pulse laser shock peening. The method comprises the steps that thermal ablation and molten pool dynamics are coupled to establish a physical field of a laser etching part; a shock wave pressure model and a material constitutive model are introduced into the physical field of the laser etching part, and a multi-physical-field transient model is established; performing multi-objective optimization on the multi-physical field transient model, and replacing model parameters in the original model with optimized model parameters; by establishing a multi-physical field transient model coupling ablation and shock wave effects, synchronous and high-precision simulation of the laser shock peening effect in the process of etching the microgroove in the metal surface by short-pulse laser is realized; the limitation that shape control machining and performance strengthening are mutually separated in traditional simulation is overcome; understanding of an internal strengthening mechanism in the laser etching process is deepened, and an efficient digital design and prediction tool is provided for integrated process optimization of microgroove high-quality shape control and substrate fatigue performance improvement.

The present invention relates to a short-pulse laser milling process for laser-deposited parts, belonging to the field of micro-nano processing technology. The process includes the following steps: S1: Material preparation: Selecting a 316 stainless steel plate with dimensions of 200mm×200mm×16mm as the deposition substrate, ensuring that the substrate surface is clean and free of oil; S2: Laser deposition process, equipment configuration: Selecting a RofinFL040 kilowatt-class fiber laser; S3: Laser cleaning process; S4: Laser milling process; S5: Data recording and analysis; S6: Process parameter optimization response surface analysis; S7: Result feedback: Adjusting process parameters based on experimental results to optimize milling results; S8: Stability verification and application. The present invention can effectively improve the material removal rate and surface quality during laser milling, and reduce the thickness of the recast layer, thereby overcoming the bottlenecks faced by traditional processing methods in the manufacture of high-complexity, high-precision parts, and has wide applicability.