142 results about "Nanosecond laser" patented technology

The invention belongs to the related technical field of lasers, and provides a high-power subnanosecond-nanosecond laser in order to solve the problems that the range adjustment and the application range of an existing laser are limited, and the structural stability needs to be improved. A modulation semiconductor seed source, an optical fiber pre-amplifier, a light beam isolation system, a high repetition frequency solid pre-amplifier, an acousto-optic modulator frequency reduction module and a multi-stage solid single-pass main amplifier are sequentially arranged along an optical path, continuous adjustable output of repetition frequency and pulse width is achieved, the adjustable range of the repetition frequency is 100 kHz to 1 MHz, the adjustable range of the pulse width is 100 ps to 10 ns, and the adjustable range of the pulse width is 100 ps to 10 ns. The laser power and the light beam quality are remarkably improved, and the method is suitable for the fields of high-precision micromachining, nonlinear optical research, medical cosmetology and the like.

The invention discloses a method for realizing high-quality stripping of large-size diamond by double-laser composite modification, which comprises the following steps: placing and fixing a sample on a three-dimensional mobile platform, and the upper surface of the sample is a crystal face (100); laser generated by an ultrafast laser generator penetrates through the upper surface of a sample and is focused into the sample, and then the laser generated by the ultrafast laser generator is used for performing first spot scanning on the sample to form an independent lattice structure; laser generated by the ultrafast laser generator is adopted to carry out secondary spot scanning on the sample to form a crack interconnected lattice structure; performing third-time line scanning on the sample by using laser generated by a nanosecond laser generator; and ultrasonically stripping the sample in water bath. By adopting a dual-laser composite modification process and combining bionic'honeycomb 'and'turtle shell' crack structure design, the crack is effectively guided to directionally extend along the crystal face (100), the problem of oblique crack when the stripping face is the crystal face (111) in the past is avoided, and the integrity and flatness of the stripping face are greatly improved.

The invention provides a laser marking system and method for metal surface dazzling and coloring, and relates to the technical field of metal surface laser precision machining.The system integrates a femtosecond laser, a nanosecond laser, an optical bread board, a lifting platform, an electric rotating slide, a scanning galvanometer, a focusing lens, a computer control system and an adsorption platform; two laser marking processes of colorful marking and coloring marking are innovatively combined; the femtosecond laser device achieves a colorful effect on the metal surface through ultrashort pulses, and the nanosecond laser device generates a colorful effect of various colors through the heat effect. Automatic switching of the two lasers is controlled through the lifting platform, the computer automatically recognizes the drawing and document process type, and multi-color-zone pattern marking is efficiently completed. The system is simple in structure and convenient to operate, can meet the high-precision double-process marking requirement of the metal surface, and is widely applied to the fields of consumer electronics, anti-counterfeiting technologies and the like.

The invention provides an infrared femtosecond and infrared nanosecond laser combined machining system and a bionic machining method, and relates to the technical field of laser surface machining. According to the method, rapid rough machining and pre-structure construction are achieved through nanosecond laser, then fine modification and micro-nano structure regulation and control are conducted through femtosecond laser, the machining efficiency and the structure quality can be remarkably improved through the synergistic effect of the nanosecond laser and the femtosecond laser, meanwhile, the heat influence is reduced, high-precision and low-damage machining of the SiC surface is achieved, and the machining quality is improved. And a technical support is provided for constructing a surface structure with special functionality.

The invention provides a method for processing a micropore by combining vortex beam shaping femtosecond laser with nanosecond laser, which comprises the following steps of: firstly, taking charge of melting and sublimation of a material by utilizing the high-power characteristic of the nanosecond laser, and then taking charge of finish machining of the hole wall of the processed micropore by utilizing the characteristics of small heat affected zone and high peak energy of the femtosecond laser. Therefore, the problems that the heat affected zone of the hole wall of the micropore machined by nanosecond laser is large, and the machining quality of the hole wall is poor due to material melting and recasting are solved. Therefore, the advantages of high efficiency of nanosecond laser micropore processing, small thermal damage area of femtosecond laser material processing and high micropore pattern quality of the processed micropore are combined, coarse and fine synchronous processing is finally realized, and the processing quality of the micropore wall is improved.

The invention discloses a high-temperature high-density plasma generation and radiation opacity measurement method, which comprises the following steps: clamping a target material by using low-density low-Z-element foam to form a sandwich structure sample, and synchronously and directly driving the sandwich sample from two sides by using multiple beams of smooth nanosecond laser, the preparation temperature reaches 1,000,000 DEG C, and the electron density reaches 1 * 1023 pieces per cubic centimeter; then generating an X-ray source through the action of one or more nanosecond laser beams and the high-Z material, measuring the absorption spectrum of the X-ray source penetrating through the target plasma, the backlight spectrum of the X-ray source not penetrating through the target plasma and the self-emission spectrum of the target plasma through a spectrograph, and finally realizing the measurement of the radiation opacity of the high-temperature and high-density plasma. The high-temperature and high-density plasma radiation opaqueness measurement device has the beneficial effects that the high-temperature and high-density plasma radiation opaqueness measurement of which the temperature reaches 1,000,000 DEG C and the electron density reaches 1 * 1023 per cubic centimeter is realized on a million-joule nanosecond laser device.

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.

The invention discloses a multi-modal AI material quantitative and qualitative rapid detection method, which comprises the following steps: acquiring multi-modal data through a double-pulse laser excitation system, carrying out time-space alignment, and cooperatively exciting light and heavy element characteristic plasmas by using femtosecond laser and nanosecond laser; spectral decoupling and dynamic compensation are carried out based on physical rule embedding, spectral signals are separated, and interference is suppressed; a light-heavy element dual-channel deep learning model is constructed, and multi-modal data is fused, so that feature extraction and prediction capabilities are improved; and a double-source mutual verification optimization model is adopted, so that the result reliability is ensured. According to the method, the limitation of single-mode detection is overcome, multi-component high-precision real-time synchronous detection of coal is realized, the adaptability of the model to complex coal quality and environmental change is improved, and an effective and accurate solution is provided for online monitoring of coal quality of a coal-fired power plant.

The application relates to a substrate with micro-nano composite texture and a preparation method and application thereof, and belongs to the technical field of biological medicine. The preparation method comprises the following steps: S1, adopting a nanosecond laser to perform texture treatment on pretreated metal titanium, forming micro texture on the surface of the metal titanium, and obtaining micro texture metal titanium; S2, uniformly stirring ammonium fluoride in ethylene glycol, then uniformly stirring water in the ethylene glycol, and obtaining an electrolyte; S3, connecting the positive pole of a direct current power supply to the micro texture metal titanium as an anode, connecting the negative pole of the direct current power supply to a platinum electrode as a cathode, and performing magnetic field assisted anodic oxidation treatment on the micro texture metal titanium in the electrolyte, so that nano texture is formed on the surface of the micro texture metal titanium; and after cleaning and drying, a substrate with micro-nano composite texture is obtained. The substrate is applied to a drug-loaded coating of a metal implant, can realize micro-nano multi-scale cooperation, integrates the macrostructure advantage of the micron texture and the surface characteristics of the nanotube, and greatly improves the comprehensive performance of the drug-loaded coating.

The utility model relates to the field of stainless steel plate coloring equipment, in particular to a workbench for nanosecond laser coloring equipment, which comprises a frame and a cooling and supporting integrated device installed through the frame, the cooling and supporting integrated device comprises a plurality of branch pipelines, a plurality of supporting pieces are installed on the branch pipelines at intervals, and the supporting pieces are connected with the frame. A discharge port is formed in the part, between every two adjacent supporting pieces, of the branch pipeline, and the discharge ports are formed upwards; one end of each branch pipeline is closed, the other end of each branch pipeline is communicated with the main pipeline, the branch pipelines are connected in parallel, and the main pipeline is connected with a cooling medium source. By means of the working table, cooling treatment can be provided for the stainless steel plate in the treatment process, and meanwhile the interference influence on suction and collection work of dust particles of a dust removal structure above the working table can be avoided.

The application discloses a kind of processing methods for improving the sterilization performance and anti-adhesion performance of medical titanium metal surface, and the specific steps are as follows: 1) pretreatment is carried out on titanium metal sample and cleaned and dried for standby;2) nanosecond laser is used to process the titanium metal sample after pretreatment, to form micron grid structure on its surface;3) configure zinc oxide seed solution, and spin coating solution on the titanium metal sample after laser processing, so that micron grid structure surface is evenly fixed on zinc oxide seed layer;4) using hydrothermal synthesis method, prepare rod-shaped zinc oxide nanostructure on the titanium metal surface with zinc oxide seed layer spin coated;5) configure ethanol solution containing fluorosilane, modify the surface of micro-nano composite structure, and after standing, dry.The titanium metal surface constructed by the application has the dual functions of sterilization and inhibition of bacterial adhesion, the preparation method is simple, and bacterial resistance is not easy to produce, and has potential application prospect.

The invention relates to a method for displaying latent fingerprints based on nanosecond laser preparation and oxide film transfer. Belongs to the field of latent fingerprint development. The method comprises the following steps that a transparent material is attached to metal, nanosecond laser penetrates through the transparent material and irradiates the surface of the metal through multi-line scanning, the metal is subjected to phase change, generated metal oxide molten particles are attached to the surface of the transparent material, and a compact metal oxide layer is formed. The oxide layer is arranged above the latent fingerprint, and after laser multi-line scanning, the oxide film and the transparent material interface form a high-voltage area. Through heat conduction, the oxide attached to the latent fingerprint is heated to be subjected to phase change, is driven by high pressure to be transferred to the surface of the fingerprint, is in contact with a latent fingerprint sample at a relatively low temperature and then deposits to push the molten mass to the surface of the latent fingerprint, and the molten mass deposits to form a film. But as skin secretions are attached to the ridge line, the deposition capacity of a molten mass is weak, the contrast ratio of the skin secretions and the molten mass is enhanced, and fingerprints appear. The method has the advantages of simplicity in operation, no pollution, low cost and the like. The method has potential application prospects in the criminal investigation field.

The application discloses a kind of for CFRP big depth-diameter ratio array hole multi-pulse width laser composite processing system and method.The system includes: multi-pulse width laser generation module, for outputting two initial laser beams;Beam shaping module, for the optical axis of two initial laser beams is adjusted to coaxial, the initial laser beam is shaped, adjusts the polarization state of initial laser beam, initial laser beam is modulated into two sub laser beams, adjusts the energy distribution of two sub laser beams, two sub laser beams are converted into two mirror image symmetrical distribution in the focusing laser beam array of two sides of the CFRP matrix to be processed.The application can be applicable to the high-efficiency high-precision processing of CFRP big depth-diameter ratio array hole, and nanosecond laser is used to improve processing efficiency, and femtosecond laser is used to effectively inhibit carbon fiber delamination and thermal damage of resin matrix.

The present invention discloses a numerical simulation method for laser-induced phase explosion based on the finite element method, which relates to the technical field of high-power laser and material interaction. Laser parameters are preset to establish a numerical simulation model for nanosecond laser ablation of metals. Laser energy is used as a heat source term to generate a two-dimensional numerical grid for the calculation domain of metal ablation. Phase change heat transfer theory is used to consider the metal's phase change, phase interface movement, and particle evaporation backscattering effects to simulate the physical process and obtain the saturated vapor pressure, hot liquid pressure, and material surface temperature. Based on these saturated vapor pressure, hot liquid pressure, and material surface temperature, the numerical simulation model is discretized and solved using the finite element method. Particle tracking is used to simulate the gas-liquid phase splashing process at the moment of explosion. The present invention can accurately predict the dynamic evolution characteristics of phase explosions during laser ablation, providing important theoretical support and technical assurance for fields such as laser processing, laser propulsion, and laser micro-nano processing.

This invention relates to an atomic-level manufacturing method and apparatus for two-dimensional metal oxide nanosheets based on controllable micro-explosion, belonging to the field of functional nanomaterials and atomic-level precision manufacturing technology. This invention uses transition metal energetic complexes and energetic oxygen compounds as metal-oxygen integrated precursors. Under the constraint of an array-type nano-confined microcavity, controllable micro-explosions are synchronously triggered by nanosecond lasers to achieve nanosecond-level stoichiometric precision in the directional self-assembly of two-dimensional metal oxide nanosheets. The preparation cycle of this invention is reduced to less than 10 minutes, and the overall energy consumption is less than 1% of that of the traditional hydrothermal method. The product has excellent specific surface area, photocatalytic and cycling performance, and is 100% compatible with existing mass production lines. It is suitable for large-scale manufacturing in fields such as photocatalysis, energy storage, gas sensors, and environmental governance.

This invention discloses a two-dimensional infrared spectroscopy system and its detection method that combines acid-base step and pulsed heating. The system includes a femtosecond laser, an optical parametric amplifier and difference frequency generator, a frequency divider, an electronic time delay generator, a nanosecond laser, a detachable optical parametric oscillator providing 355nm light pulses, an optical parametric oscillator providing 2020nm light pulses, a monochromator and a mercury cadmium telluride array detector, an integrator and data acquisition card, a computer, a chopper, a time-resolved pulse generation chamber, and a sample chamber. This invention retains the original pulsed heating trigger mode by using a nanosecond light source with a detachable optical parametric oscillator providing 355nm light pulses. It achieves convenient switching between the acid-base step and pulsed heating modes through a dichroic mirror and a reversible reflector. Before and after switching, the propagation direction of the nanosecond pulses is completely consistent, and the relative time delay is corrected by the electronic time delay device.

The present invention relates to a laser beam combining and forming device and method with coordinated spatiotemporal phase control, which mainly includes a laser spatiotemporal beam combining device, a laser beam splitting device, and a laser shock forming device. The laser spatiotemporal beam combining device includes two nanosecond lasers, three one-way glasses, three reflectors, a transmission device, and a high-reflective material; the laser beam splitting device includes multiple motors, multiple semi-transparent mirrors, and multiple delay devices; the laser shock forming device includes optical glass, a gasket, an x-y-z three-axis processing platform, and a water spray device. The present invention first uses polarization beam combining to combine two pulse lasers, and then multiplies the combined laser to obtain laser energy with a greater energy density; then, the laser beam splitting device can obtain ultra-high repetition rate laser pulses. The shock waves under the ultra-high repetition rate will have mutual influences, providing a new method for laser shock forming.

The invention belongs to the technical field of laser surface modification processing, and particularly relates to a femtosecond-nanosecond double-beam laser cooperative shock peening method, which comprises the following steps of: taking a nanosecond laser and a femtosecond laser as shock peening light sources at the same time, and combining the two beams of laser through a beam combiner, focusing on the surface of the workpiece through a focusing optical system for impact strengthening; when the workpiece is subjected to shock peening, the time delay between the femtosecond pulse and the nanosecond pulse is controlled through the time delay device, so that the femtosecond laser reaches the surface of the workpiece before the nanosecond laser; the femtosecond laser firstly ionizes a material on the surface of a workpiece to form plasma, and realizes strong absorption of subsequent nanosecond laser, so that the depth of an influence layer of nanosecond impact strengthening can be achieved without an absorption layer and a water restraint layer. The method has the advantages of femtosecond laser shock peening, that is, a restraint layer and an absorption layer are not needed, and the method has the advantage of nanosecond shock peening, so that the depth of a deep influence layer can be realized.

The invention relates to the technical field of lasers, in particular to a multi-wavelength output nanosecond laser. The laser comprises a pumping source, a pumping coupling device, a pumping end mirror, a gain crystal, a Q-switching device, a turning mirror, a frequency tripling crystal, a frequency doubling crystal and a tail end mirror. A pumping source, a pumping coupling device, a pumping end mirror, a gain crystal, a Q-switching device and a turning mirror are sequentially arranged in the light emitting direction of the pumping source. A turning mirror, a frequency tripling crystal, a frequency doubling crystal and a tail end mirror are sequentially arranged along the reflection direction of the turning mirror; the tail end mirror is a plane mirror, the end face, facing the frequency doubling crystal, of the tail end mirror is plated with a fundamental frequency light partial reflection film and a frequency doubling light high reflection film, and the transmittance of the fundamental frequency light partial reflection film is 2%-98%. The multi-wavelength output nanosecond laser provided by the invention can synchronously output multi-wavelength nanosecond laser with adjustable power pulse width by controlling the transmittance of the film layer of the output lens at the tail end.

The invention discloses a humidity-driven soft actuator and a preparation method thereof, the actuator takes a patterned black polyimide (PI) film as a substrate, and the substrate is compounded with two-dimensional transition metal carbide Ti3C2Tx (MXene) / amylopectin amp; a functional layer is formed by Amylose / carbon nanotubes (CNTs), when the functional layer absorbs moisture and expands, the actuator is bent towards the PI side, and when the functional layer is dehumidified and contracts, the actuator is bent reversely; the bending response direction is defined through the substrate gap direction of nanosecond laser machining, and the initial curvature and the bending degree are regulated and controlled through vacuum hot pressing treatment. The components cooperate to endow the actuator with rapid humidity response capability and excellent mechanical stability. The technical problems that an existing humidity driving actuator is poor in programmability and an interface is prone to stripping are solved, an external driving source is not needed, the technology is simple, convenient and controllable, and the potential application value in the fields of soft robots, flexible intelligent equipment and the like is shown.

The invention provides a space propulsion method of a nanosecond-femtosecond composite light filament, which is used for solving the problem of low long-distance laser propulsion efficiency. The method specifically comprises the following steps: forming a kilometer-level length filament through a space filament forming principle of femtosecond laser, stabilizing the power density at 1013-1015W / cm < 2 > magnitude by utilizing a light intensity clamping effect, and realizing dozens of kilometer-level low-loss energy transmission; meanwhile, the transmission direction of the nanosecond laser is adjusted through the optical lens group, the formed nanosecond filament and the femtosecond laser are coaxially transmitted or transmitted at a certain angle and act on the same position, a plasma channel generated by the filament enables the transmission loss of the high-energy nanosecond laser to be greatly reduced, and the energy absorption of the target material to the nanosecond laser is remarkably improved; therefore, the surface of the target material is melted, gasified and even ionized in an extremely short time, a large number of high-speed reverse-spraying plasma plumes are generated, and high specific impulse and thrust are obtained. The method is suitable for various target materials, and precise control over the thrust, the specific impulse and the propelling direction can be achieved by regulating and controlling laser parameters.

Provided are a manufacturing apparatus and a manufacturing method of an electrode for a secondary battery which forms a large number of holes in the electrode mixture having a level difference in thickness, by irradiating twice or less with a nanosecond laser, and an electrode for a secondary battery manufactured by the same.

The invention discloses a nanosecond laser precision machining method for a SiCf / SiC composite material, and belongs to the field of laser machining and advanced composite material manufacturing. The method comprises the following steps: carrying out linear ablation or surface ablation on a pretreated SiCf / SiC composite material by adopting nanosecond pulse laser with the wavelength of 355 nm; the laser energy density, the scanning speed, the scanning times, the line overlapping ratio and the scanning path are optimized through the system, and high-precision and low-damage machining is achieved. The core optimization parameters are as follows: the laser energy density is 5.33 J / cm < 2 >, the scanning speed is 200mm / s, the line overlapping rate is 66.58%, and a one-way scanning mode is adopted. Through the combination of experiments and simulation, the mechanism (melting, evaporation, decomposition, and material removal by liquid drop splashing and gas volatilization) of nanosecond laser ablation of SiCf / SiC is disclosed, the heat affected zone, the oxidation phenomenon and the recondensate defect are effectively controlled, the quality and the contour precision of the machined surface are remarkably improved, and the machining precision is improved. The method is suitable for micromachining of key components such as aerospace engine hot end components and medical high-end equipment.

The invention provides nanocrystalline surface hardened austenitic stainless steel and a preparation method thereof.The microstructure of the stainless steel is an isomerous austenitic structure wrapped by nanometer isometric crystals, and the preparation method of the nanocrystalline surface hardened austenitic stainless steel comprises the following steps that firstly, the austenitic stainless steel plate is subjected to low-temperature cross rolling deformation treatment, and rolling deformation in different directions is controlled; inducing to form deformation-induced martensite strip structures which are uniformly distributed and mutually crossed; then a rapid heating technology is used for enabling deformation to induce the martensite to inversely change into hardened austenite; then nanosecond laser melting treatment is conducted on the surface of the stainless steel plate, so that nano-sized isometric crystals are obtained on the surface; and finally, the steel plate subjected to laser melting is subjected to warm rolling deformation treatment, residual tensile stress introduced to the melting surface is converted into pressure stress, and the surface corrosion resistance is further improved while the yield strength of the steel plate is improved. While the yield strength of the austenitic stainless steel is improved, good corrosion resistance and plasticity can also be considered.

The preparation method comprises the following steps that firstly, an austenitic stainless steel plate is subjected to cross warm rolling treatment, and the yield strength of the steel plate is improved; then, the surface of the steel plate is subjected to remelting treatment through high-frequency pulse nanosecond laser combined with an ultra-fast cooling technology, and 280-510 nm isometric crystals are formed on the surface of the steel plate; and finally, stress relief annealing is conducted on the workpiece obtained after laser melting, residual stress generated in the laser melting process is eliminated, the plasticity of experimental steel is guaranteed, and finally the high-strength corrosion-resistant austenitic stainless steel is obtained.

The invention discloses a multi-pulse-width laser combined machining system and method for CFRP large depth-diameter ratio array holes. The system comprises a multi-pulse-width laser generation module used for outputting two initial laser beams; a beam shaping module, the optical axis adjusting module is used for adjusting the optical axes of the two initial laser beams to be coaxial, shaping the initial laser beams, adjusting the polarization state of the initial laser beams, modulating the initial laser beams into two sub-laser beams and adjusting the energy distribution of the two sub-laser beams; and the two sub laser beams are converted into two focused laser beam arrays which are distributed on the two sides of the CFRP base body to be machined in a mirror symmetry mode. The method can be suitable for efficient and high-precision machining of the CFRP array holes with the large depth-diameter ratio, the machining efficiency is improved through nanosecond laser, and layering of carbon fibers and thermal damage of a resin matrix are effectively restrained through femtosecond laser.

The application discloses a kind of magnetic particle film and preparation method thereof.The preparation method of the magnetic particle film of the application comprises: quartz matrix is subjected to metal vapor vacuum arc ion implantation process, laser annealing process, to obtain magnetic particle film.The application obtains the preparation method of the magnetic particle film suitable for transparent substrate, simple process, effective magnetic modification, small and uniform particle size, high controllability and good repeatability by combining metal vapor vacuum arc ion implantation technology with nanosecond laser annealing, and setting and controlling by specific process parameters.Moreover, the magnetic particle film with sub-10 nanometer particle size and uniform distribution can be prepared by the above method, which has wide application prospect in high-density magnetic recording, micro-magnetic sensor and the like.

The invention provides a nickel-based superalloy surface cleaning method, and relates to the technical field of alloy surface treatment. In the inert atmosphere, nanosecond laser cleaning is carried out on the nickel-based superalloy. The method provided by the invention is a gas-assisted nanosecond laser cleaning method for the high-temperature alloy surface, the cleaning mode is a non-contact cleaning process, the alloy surface does not need to be contacted during working, and surface oxides and oil stains can be effectively removed by strictly controlling the conditions of the nanosecond laser cleaning process, so that the alloy surface is not damaged; alloy deformation and hot cracks cannot be caused; meanwhile, in the laser cleaning process, inert gas is utilized to enable the treated sample to be in an inert gas protection environment, oxygen is prevented from making contact with the alloy surface to cause secondary oxidation pollution, and the alloy quality is guaranteed; in addition, accurate and efficient cleaning can be achieved in the specified position and the specified area of the surface of the special-shaped part, meanwhile, no chemical cleaning agent is needed in the cleaning process, and the method is safer and more environmentally friendly.

The application belongs to the technical field of laser surface modification processing, and particularly relates to a femtosecond-nanosecond dual-beam laser synergistic shock strengthening method, wherein a nanosecond laser and a femtosecond laser are simultaneously used as a shock strengthening light source, the two lasers are combined through a combiner, and then focused on the surface of a workpiece through a focusing optical system for shock strengthening; when the workpiece is subjected to shock strengthening, a time delay between the femtosecond pulse and the nanosecond pulse is controlled through a time delay device, so that the femtosecond laser reaches the surface of the workpiece first; the femtosecond laser first ionizes the material on the surface of the workpiece to form a plasma, and strongly absorbs the subsequent nanosecond laser, so that the influence layer depth of nanosecond shock strengthening can be achieved without an absorbing layer and a water restraining layer. The application has the advantages of femtosecond laser shock strengthening, i.e. without a restraining layer and an absorbing layer, and the advantages of nanosecond shock strengthening, i.e. a relatively deep influence layer depth can be achieved.