51 results about "Ultraviolet laser light" patented technology

To provide an ultraviolet laser marking composition with reduced chlorine-based resin content that achieves a packaging material having superior printability by ultraviolet laser and superior transparency, and also exhibits superior adhesion to a substrate, a printed material using the same, and a method for recycling the printed material.SOLUTION: An ink composition for ultraviolet laser marking comprises at least zinc oxide particles, a urethane resin, and a chlorinated polyolefin resin. The chlorine content in the total resin solids in the ink composition is 1.5 mass% or less.SELECTED DRAWING: None

The utility model discloses a capsule endoscope convenient for on-off control, which comprises a capsule shell, and a battery, a circuit board, a chip, an antenna, a lens module and an LED (light-emitting diode) are arranged in the capsule shell; the device further comprises an infrared photoresistor, an infrared laser light source, an ultraviolet photoresistor and an ultraviolet laser light source. The LED, the infrared photoresistor and the ultraviolet photoresistor are all installed on the lens module, and the infrared photoresistor and the ultraviolet photoresistor are connected with the chip and controlled by the chip. The infrared laser light source and the ultraviolet laser light source are positioned outside the capsule shell; the infrared laser light source is matched with an infrared photoresistor; and the ultraviolet laser light source is matched with the ultraviolet photoresistor. On and off of the capsule endoscope are achieved through irradiation of the infrared laser light source and the ultraviolet laser light source, the capsule endoscope can be matched with a single-lens capsule endoscope and a double-lens capsule endoscope, contact between the capsule endoscope and the outside is reduced under the condition that the size and the shell integrity of the capsule endoscope are not changed, and regular inspection tour and electric quantity checking of the capsule endoscope are facilitated.

The utility model relates to the technical field of labeling, coding and detecting all-in-one machines, and discloses a paper box labeling, coding and detecting all-in-one machine which comprises a machine frame, a cantilever control box is arranged on one side of the machine frame, a conveying belt assembly is installed in the machine frame, and a lifting belt assembly for synchronous conveying is arranged at the top of the conveying belt assembly. A labeling mechanism, an ultraviolet laser machine, a visual detection mechanism and a removing mechanism are arranged in the rack, and the ultraviolet laser machine and the visual detection mechanism are located between the labeling mechanism and the removing mechanism; according to the full-automatic carton labeling and code printing machine, labeling, code printing and detection of the cartons are integrated, the full-automatic carton labeling and code printing machine is controlled by the cantilever control box in a unified mode, production efficiency can be improved, and product loss caused by butt joint of the full-automatic carton labeling and code printing machine is reduced.

The invention provides a porous membrane as well as a preparation method and application thereof. The preparation method of the porous membrane provided by the invention comprises the step of performing laser drilling treatment on a base membrane by adopting a laser light source in an ultraviolet light band to obtain the porous membrane. According to the method, the ultraviolet laser light source which is short in wavelength, high in light source absorptivity of the membrane material and low in heat effect is adopted for punching, and the porous membrane which is small in average aperture, high in surface flatness and high in mechanical strength can be obtained.

To provide a wavelength conversion mechanism capable of outputting a plurality of systems of ultraviolet laser beams having high output power (pulse energy) without causing deterioration of an optical element for branching.SOLUTION: The wavelength conversion mechanism converts the wavelength of a pulsed laser light with a predetermined repetition frequency, the pulsed laser light being a wavelength-conversion-target light, into laser light in an ultraviolet region, the wavelength conversion mechanism including: a branching optical system for branching the wavelength-conversion-target light into pulse units in a time domain; and a plurality of ultraviolet region wavelength conversion elements for converting each of pieces of the wavelength-conversion-target light branched by the branching optical system into the laser light in the ultraviolet region.SELECTED DRAWING: Figure 2

The invention relates to a device and method for testing a deep ultraviolet laser damage threshold of an element, and the device comprises a first laser module which is set to emit deep ultraviolet laser; the second laser module is set to emit ultrashort pulse laser with the same light spot size as that of the first laser module; the beam combining module is arranged to enable the laser emitted by the first laser module and the laser emitted by the second laser module to be coaxial and emit the modulated laser to a test element; the detection module comprises a first detection unit and a second detection unit which are used for detecting light beam energy, the first detection unit is arranged on a light path of the beam combining module and the test element, and the second detection unit is arranged in a light path penetrating out of the test element; and the control module is respectively connected with the first laser module and the second laser module and is used for controlling laser energy emitted by the first laser module and the second laser module and determining a deep ultraviolet laser damage threshold value of the test element according to information sent by the first detection unit and the second detection unit.

A method for inter-substrate transfer of microelectronic devices includes applying a polymer coating to a top surface of a microelectronic device located on a first substrate, depositing an ultraviolet-transmissive adhesive on a second substrate, contacting the polymer-coated top surface of the microelectronic device to the adhesive to bond the microelectronic device to the second substrate, detaching the microelectronic device from the first substrate, and, while the bottom surface of the microelectronic device faces a third substrate, irradiating and ablating the polymer coating with ultraviolet laser light through the second substrate and the adhesive to transfer the microelectronic device from the second substrate to the third substrate via laser lift-off. The method allows for use of ultraviolet-transmissive adhesives, with the polymer coating protecting the microelectronic device from damage by ultraviolet light that, in the absence of the polymer coating, would be transmitted by the adhesive during laser lift off.

The application relates to a method of testing an item with a spectrally precise, artificial solar spectrum including wavelengths from 200 nm to 20 microns and it also relates to a solar spectrum simulator capable of producing a light spectrum including wavelengths from 200 nm to 20 microns. The simulator comprises: a) amplitude optimization software; b) a spectrum controller; c) an emitter controller; d) heat lamp / heater generation sources including: a xenon / infrared (IR) lamp and a blackbody radiator; e) laser generation sources including an ultraviolet (UV) laser source, a visible laser source, a near infrared (NIR) laser source, a short wavelength (SW) laser source, a medium wavelength (MW) laser source, a long wavelength (LW) laser source, and a quantum cascade laser source (QCL); f) a beam combiner; g) a beam profiler; h) a spectrometer; and i) a surface on which can be placed an item to be tested.

The invention provides a high repetition frequency deep ultraviolet pulse laser and a design method thereof. The laser comprises an optical fiber seed source, a multi-stage solid amplifier, a second acousto-optic modulator, a first frequency doubling system, a pre-compensation system, a second frequency doubling system and an output stability adjusting system. The second frequency doubling system comprises a first BBO crystal and a second BBO crystal. The pre-compensation system comprises a spherical mirror group and a cylindrical mirror group which are arranged in front of the first BBO crystal and the second BBO crystal. And the output stability adjusting system is used for accurately controlling the temperature of the first frequency doubling system and the second frequency doubling system so as to maintain a phase matching condition. The obtained laser passes through a series of optical filters and light beam shaping devices, deep ultraviolet laser which is stable and good in monochromaticity is output, the device is suitable for the fields of precise photoetching, micromachining and scientific research, and efficient laser conversion efficiency and stable output performance are ensured.

The invention relates to the technical field of laser output, in particular to a system and method for outputting deep ultraviolet laser through a single optical fiber, and the system comprises a seed laser source, an optical fiber Raman conversion module, a frequency doubling module and a sum frequency module. All modules at the front end of the system can be directly and optically connected through optical fibers, multiple sets of laser sources and frequency locking operation or a complex spatial light path calibration process are not needed, the spatial light path layout is simplified, natural and excellent light beam quality is achieved, the defect that a spatial light path is prone to being interfered by the environment is overcome, and a foundation is laid for the subsequent nonlinear change process; and the optical fiber element can be directly integrated, so that the system integration degree is improved, the heat distribution of the optical fiber element is more uniform, the overall heat management difficulty of the system is reduced, and the stability and the line width consistency of deep ultraviolet laser output are improved.

The utility model relates to the technical field of laser printing devices, in particular to a five-package film-entering laser printing device, and adopts the technical scheme that the five-package film-entering laser printing device comprises a bottom plate, a fixing frame, a shell, a screw rod and a fan, a hydraulic cylinder is mounted at the top end in the fixing frame, and a fixing plate is mounted at the bottom of the hydraulic cylinder; an ultraviolet laser marking machine body is mounted at the bottom of the fixing plate, a connecting plate is welded to the front end of the fixing frame, screw holes are symmetrically formed in the connecting plate, the two screws are in engaged connection with the two screw holes correspondingly, two bearings are symmetrically mounted at the top of the shell, and the bottoms of the two screws are fixedly connected with inner rings of the two bearings correspondingly; a grid frame is mounted on one side in the shell, a filter screen is inserted into the other side in the shell, and a fan is mounted in the shell on the side, opposite to the grid frame, of the filter screen. The air blowing device has the advantages that clean air can be blown to the top surface of a packaging paper (film) roll, and dust is prevented from affecting the printing quality.

To provide a laser processing system related to one viewpoint.SOLUTION: A laser processing system includes: a laser device for outputting a deep ultraviolet laser beam in response to reception of a light emission trigger signal; an optical isolator including a polarizer and a deep ultraviolet light transmission element which are arranged on the optical path of the laser beam, and a piezo element connected to the deep ultraviolet light transmission element; and a processor for supplying a driving signal whose voltage is changed by characteristic frequency of the deep ultraviolet light transmission element to the piezo element, and transmitting a light emission trigger signal to the laser device with the characteristic frequency or a frequency obtained by frequency-dividing the characteristic frequency as a repetitive frequency, so that the deep ultraviolet light transmission element functions as a 1 / 4 wavelength plate by stress birefringence generated according to force applied from the piezo element at a timing at which the laser beam passes through the deep ultraviolet light transmission element, and irradiates a workpiece with the laser beam emitted from the optical isolator and processes the workpiece.SELECTED DRAWING: Figure 5

The invention relates to the technical field of disinfection of incubators, and discloses an automatic disinfection device for a ginger detoxification breeding incubator, which comprises an incubator, a plurality of culture mediums for planting ginger are placed in the incubator, a plurality of groups of ultraviolet laser lamps for disinfection are arranged in the incubator, and a blocking plate is arranged on one side of the incubator. A transparent observation plate is fixedly installed in the middle of the plugging plate, a shielding assembly is arranged on one side of the transparent observation plate and used for shielding the transparent observation plate when the incubator is disinfected, and a sweeping assembly for cleaning the transparent observation plate is arranged on one side of the shielding assembly. When the incubator is disinfected, the shielding cloth can be gradually unfolded, the surface of the transparent observation plate is shielded when the shielding cloth is unfolded to the transparent observation plate, and the situation that an operator can observe the internal situation of the incubator in the disinfection process, and potential hazards are brought to eyes and skin of the human body is avoided.

A method of manufacturing a semiconductor device and a semiconductor device are provided. A method for manufacturing a semiconductor element includes forming a tin-containing oxide film on a gallium oxide-based compound, irradiating the tin-containing oxide film with an ultraviolet laser, thereby doping tin in the gallium oxide-based compound, and forming a metal electrode on the tin-containing oxide film irradiated with the ultraviolet laser.

Provided is a resin composition which is used in the production of a flexible transparent electronic device (100) by forming a flexible transparent electronic device (100) on a glass support substrate (1) via a release layer (2), irradiating the release layer (2) with an ultraviolet laser light (LB) via the glass support substrate (1), and forming the flexible transparent electronic device (100) on the glass support substrate (1) via the release layer (2). Peeling off the flexible transparent electronic device (100) from the glass support substrate (1); the resin composition is used to form the release layer (2). The resin composition contains an ultraviolet curable resin containing a hydrophilic group and an ultraviolet light absorber that absorbs ultraviolet laser light (LB); the absorbance of the ultraviolet light absorber to the ultraviolet laser light (LB) is 0.7 or more per 1 [mu] m optical path length, and the absorbance of the ultraviolet light absorber to the ultraviolet light irradiated to cure the ultraviolet curable resin is 0.3 or less per 1 [mu] m optical path length.

This invention provides a method for protecting the surface of aluminum alloys, aluminum alloy workpieces, and their applications, relating to the fields of aluminum alloy surface modification and laser protection technology. The method includes: preparation of microstructures on the aluminum alloy surface, anodic oxidation growth array, electrochemical deposition of ultraviolet absorbing particles, and sealing treatment. The dual three-dimensional structure formed by the microstructure substrate and the anodic oxidation array increases the laser contact area and extends the laser reflection path. The bismuth-doped tin oxide composite absorbing particles achieve highly efficient absorption of ultraviolet laser light, with absorption rates exceeding 95%, and significant stray light suppression.

The invention discloses an ultraviolet achromatic objective lens for a processing head of a laser micro-jet device, belonging to the technical field of laser micro-jet devices. The processing head comprises a window, a water cavity and a nozzle, and the nozzle comprises a nozzle. The ultraviolet achromatic objective lens, the window, the water cavity and the nozzle are arranged in sequence along the optical axis direction of the ultraviolet achromatic objective lens. The ultraviolet achromatic objective lens is used to focus ultraviolet laser light into the water cavity and the nozzle. The ultraviolet achromatic objective lens comprises a first biconvex positive lens, a biconcave negative lens, a second biconvex positive lens and a meniscus positive lens group which are coaxially arranged in sequence. After being converged by the first biconvex positive lens, the ultraviolet laser light enters the biconcave negative lens, diverges through the biconcave negative lens, enters the second biconvex positive lens, converges through the second biconvex positive lens, enters the meniscus positive lens group, and converges through the meniscus positive lens group. After being converged by the meniscus positive lens group, the ultraviolet laser light sequentially passes through the window and the water cavity and enters the nozzle. Thus, the achromatic ability of the ultraviolet achromatic objective lens for ultraviolet laser light can be improved.

The present invention relates to a 399.08-nm wavelength ultraviolet laser light generating device, comprising: an excitation light source part for converting a 1064.2-nm laser light to a second harmonic, and generating a 532.1-nm laser light; an optical parametric oscillating part for generating a 798.15-nm signal light and a 1596.3-nm idler light using the 532.1-nm laser light; a first wavelength converting part for generating a 399.08-nm light by sum frequency generation of the 1596.3 nm idler light and a 532.1-nm light; and a second wavelength converting part for generating a 399.08-nm light of a second harmonic from the 798.15-nm signal light. The order of the first wavelength converting part and the second wavelength converting part is random. The present invention relates to a 228.04-nm wavelength ultraviolet laser light generating device comprising the 399.08-nm wavelength laser light generating device and a third wavelength converting part for subjecting a 399.08-nm light and a 532.1-nm light to sum frequency generation, and generating a 228.04-nm light. The present invention provides a simple device of generating a 228.04-nm laser light which is a deep ultraviolet ray in high efficiency and a simple 399.08-nm ultraviolet laser light generating device usable as a light source thereof.

The invention provides biochemical integrated equipment based on a Raman principle, and relates to the technical field of biochemical sample detection, and the biochemical integrated equipment comprises a deep ultraviolet laser light source used for generating an excitation light beam of an ultraviolet band; the coaxial light path assembly comprises an incident light path for guiding the excitation light beam and a receiving light path for collecting a Raman scattering signal generated by the sample; the spectrum light splitting and detecting unit is used for splitting the Raman scattering signal collected by the receiving light path and converting the Raman spectrum signal after light splitting into an electric signal; the automatic focusing mechanism is associated with the receiving light path and is used for adjusting the focusing state of the receiving light path according to the distance between the sample to be tested and the device; and the control and data processing unit is connected with the spectrum light splitting and detecting unit and the automatic focusing mechanism, and is used for controlling the action of the automatic focusing mechanism and receiving and processing the electric signal so as to identify the components of the sample to be detected. The equipment overcomes fluorescence interference, realizes long-distance automatic focusing, and can quickly complete biochemical sample identification.

An object of the present invention is to provide a medium for ultraviolet laser printing, in which an image printed by ultraviolet laser printing is excellent in viewability, a print product after printing is excellent in smoothness and furthermore smoking in printing is suppressed, and another object thereof is to provide a print product in which the medium for ultraviolet laser printing is used, and a processed article obtained with the medium for ultraviolet laser printing or the print product. The medium for ultraviolet laser printing of the present invention comprises a substrate layer and a print layer comprising titanium oxide, in which the substrate layer and the print layer are in direct contact with each other, an air permeability of the substrate layer is 50,000 seconds or less, and a titanium oxide content in the print layer is 0.04 g / m2 or more and 5.0 g / m2 or less.

The present application relates to the technical field of 3D printing. Disclosed are a 3D printing optical engine system and a 3D printing device. The system comprises an ultraviolet laser light source, a beam expansion module, a light homogenization module, a relay module and a digital micromirror device which are sequentially arranged on an optical path. The beam expansion module is used for receiving an ultraviolet light beam emitted by the ultraviolet laser light source and expanding the ultraviolet light beam to obtain an expanded light beam. The light homogenization module is used for receiving the expanded light beam and homogenizing the expanded light beam to obtain a homogenized light beam. The relay module is used for receiving the homogenized light beam, and adjusting the angle and dimension of the homogenized light beam to obtain a shaped light beam, the focal length of the relay module being determined on the basis of the spot size of an exit surface of the light homogenization module and the aperture angle of the digital micromirror device. The digital micromirror device is used for receiving the shaped light beam, and controlling the reflection direction of the shaped light beam so as to form a target image to be projected on a printing area. The present application can optimize the optical path layout while ensuring the overall performance of a 3D printing optical engine.

The invention discloses a laser drilling method and system, control equipment and a readable storage medium, and relates to the technical field of circuit board processing. The laser drilling method comprises the steps that materials of the surface layer of a drilling area are recognized; determining a laser light source according to the surface layer material of the drilling area; a laser light source is configured and excited to irradiate the drilling area; and adjusting the energy of the laser light source according to the surface layer temperature of the drilling area, and exciting the laser light source to irradiate the drilling area by using the adjusted energy until the material on the surface layer of the drilling area is removed. The embodiment of the invention provides the laser drilling method and system, the control equipment and the readable storage medium. The metal layer can be processed by using ultraviolet laser, and the base material layer can be processed by using carbon dioxide laser; the energy of the laser light source is adjusted according to the temperature of the surface layer of the drilling area in the drilling process, it can be guaranteed that the surface layer of the drilling area is not overheated, the hole wall is smooth, carbonization of a base material in the drilling area is avoided, and the drilling yield is increased.

The present invention addresses the problem of providing: a substrate; provided are: a sheet for ultraviolet laser printing which, when irradiated with an ultraviolet laser, provides print dots having excellent print clarity per dot; a printed matter in which the sheet for ultraviolet laser printing is irradiated with an ultraviolet laser to change the color of the irradiated region; a method for producing the printed matter; and an ink composition which is used in the production of the sheet for ultraviolet laser printing. Also provided is a processed article obtained using the sheet for ultraviolet laser printing or a printed matter. This paper for ultraviolet laser printing has a printing layer containing titanium oxide on a paper substrate, the content of the titanium oxide in the printing layer being 0.1 g / m2 or more, and the crystallite size of the titanium oxide in the printing layer being 30 nm or more.

To provide a wavelength conversion mechanism capable of outputting a plurality of systems of ultraviolet laser beams having high output power (pulse energy) without causing deterioration of an optical element for branching.SOLUTION: There is provided the wavelength conversion mechanism for wavelength-converting wavelength-conversion target light, which is pulsed laser light having a predetermined repetition frequency, into laser light in an ultraviolet region, the wavelength conversion mechanism including: a branching optical system for spatially branching the wavelength-conversion target light; and a plurality of ultraviolet wavelength conversion elements for wavelength-converting each wavelength-conversion target light branched by the branching optical system into laser light in an ultraviolet region.SELECTED DRAWING: Figure 1

The invention discloses an Innoslab wide-temperature laser suitable for low-altitude economy, and belongs to the technical field of lasers. The laser comprises a seed source generation module, a three-stage Innoslab amplification module and a frequency multiplication conversion module. The seed source generation module outputs high-quality seed light by adopting a diode single-tube pumping oscillation stage crystal and combining with a passive Q-switched element; the three stages of Innoslab amplification modules all adopt diode stack pumping slab crystals, and are matched with a pumping shaping system and a multi-pass folded light path design to realize stepped amplification of seed light energy; and the frequency doubling conversion module converts the fundamental frequency light into ultraviolet laser through a frequency doubling crystal and a frequency tripling crystal. The slab gain medium and the TEC are adopted for precise temperature control, thermal distortion is effectively restrained, the heat dissipation efficiency and the temperature adaptability are improved, and the device has the advantages of being compact in structure, high in output energy, good in light beam quality, stable in wide-temperature working and the like and is suitable for low-altitude radar detection, laser ranging and other complex environments.

The object of the present invention is to provide: a printed matter having a printing area printed by ultraviolet laser and excellent visibility, a method for producing a printed matter by irradiating ultraviolet laser, and a laser printing printing medium used in the printed matter and the method for producing a printed matter. The printed matter of the present invention has a printing area containing discolored titanium oxide on at least a portion of a sheet medium, the sheet medium being selected from paper or film having a printable area containing titanium oxide, titanium oxide being added to the sheet medium, and when the sheet medium is paper, the content of titanium oxide in the printable area of ​​the sheet medium is 1.0% by mass or more, the length-weighted average fiber length and average fiber width of the pulp constituting the paper are within a specific range, and the mass per unit area of ​​the paper is 20 g / m 2 As mentioned above, when the sheet medium is a thin film, the content of titanium oxide in the printable area of ​​the sheet medium is greater than 0.3 mass %, the thickness of the film is greater than 15 μm, the resin constituting the film contains a specific resin, and the ratio of the Raman intensity of titanium oxide originating from the printing area to the Raman intensity of titanium oxide originating from the non-printing area is less than 0.70.

The present invention relates to the technical field of laser devices, and provides a multi-wavelength medical laser system. The system in the present invention comprises: a femtosecond laser, a large-numerical-aperture focusing lens group, a deep ultraviolet nanosecond laser, a beam compensator, a first laser transmission apparatus, a first reflector, a second laser transmission apparatus, a laser light positioning apparatus, an eye-tracking system, and an operating microscope. The deep ultraviolet nanosecond laser generates deep ultraviolet laser light having a wavelength ranging from 190 to 213 nm. The femtosecond laser generates femtosecond laser light having a wavelength ranging from 800 nm to 1100 nm. The first reflector is capable of reflecting the femtosecond laser light and transmitting the deep ultraviolet laser light, or alternatively, the first reflector is capable of reflecting the deep ultraviolet laser light and transmitting the femtosecond laser light, so that a single instrument is capable of both utilizing the deep ultraviolet laser light for precise corneal ablation and employing the femtosecond laser light to perform cutting within the intermediate layer of the cornea. Multiple instruments and patient transfer are not needed during treatment, thereby simplifying a treatment procedure and improving the treatment efficiency.

The invention discloses a tunable ultraviolet laser and a test system. Comprising an electric control module, a laser assembly and a water cooling module. The electric control module is used for controlling the pumping source to emit laser and controlling the working state of the laser; the laser assembly comprises an LD pumping module, an OPO assembly and a frequency doubling crystal, the LD pumping module is used for outputting 355nm ultraviolet laser, and the OPO assembly and the frequency doubling crystal form a resonant cavity which is used for converting the 355nm ultraviolet laser into tunable laser with the wavelength of 440-660nm; variable wavelength laser output is realized by changing the angle of the frequency doubling crystal; and a cooling pipeline of the water cooling module is arranged at the laser assembly and is used for refrigerating the laser assembly. The ultraviolet laser provided by the invention adopts a three-stage frequency conversion design, is simple in structure, high in tuning speed and high in efficiency, realizes simplification of a mechanical structure by utilizing the clamping device of the frequency doubling crystal, and realizes precise angle control. And the balance between a high-power ultraviolet light source and wide tuning output is realized.

The present invention includes a pump source and a laser oscillation structure, wherein the pump source is used to provide pump light for the laser oscillation structure, the laser oscillation structure includes a crystal and a resonant cavity, which is used to absorb the pump light and generate ultraviolet laser, and the resonant cavity of the laser oscillation structure is a ring cavity structure, and a unidirectional ring laser oscillation optical path is formed in the laser oscillation structure, which is used to output narrow line width ultraviolet laser; the wavelength of the narrow line width ultraviolet laser is 261nm. Compared with the prior art, the present invention greatly reduces the volume of the ultraviolet laser with an optimized structural design, and realizes miniaturization; and provides a narrow line width ultraviolet laser with a shorter wavelength, that is, a narrow line width ultraviolet laser with a wavelength of 261nm, which is more conducive to energy concentration and also improves resolution, and is suitable for promotion and application in high-precision fields such as fluorescence absorption, Raman spectroscopy, gene detection, biochemical engineering, space optical communication and medical treatment.

This invention provides a high-precision ultraviolet laser control system and method based on pulse width modulation, belonging to the field of laser control technology. It includes an ultraviolet laser generation module, a pulse width modulation module, a laser driving module, and a system control and monitoring module. The ultraviolet laser generation module generates ultraviolet laser light. The pulse width modulation module receives an external trigger signal and generates an electrical pulse signal based on a preset target pulse width value. The laser driving module converts the electrical pulse signal into a driving current to drive the ultraviolet laser generation module. The system control and monitoring module sets the target pulse width and target energy values, monitors the output characteristics of the ultraviolet laser in real time, and adjusts the peak value of the electrical pulse signal or driving current based on the output characteristics of the ultraviolet laser. This invention achieves high-precision and high-stability control of the ultraviolet laser pulse width and energy by combining electrical pulse width modulation with closed-loop feedback.