55 results about "Co2 laser" patented technology

The invention provides an electromagnetic field constraint system and constraint method for a CO2 laser amplifier, and the system comprises a spiral electrode which is wound on a discharge tube of the CO2 laser amplifier, the spiral electrode comprises a first DC positive electrode, a radio frequency positive electrode, a second DC positive electrode and a ground electrode which are sequentially and adjacently arranged, and the current flows through the first DC positive electrode in the electric field direction from the first DC positive electrode to the ground electrode. The electric field direction of the current from the second direct current positive electrode to the ground electrode is partially perpendicular to the electric field direction of the current from the radio frequency positive electrode to the ground electrode; the CO2 laser amplifier discharge tube and the Helmholtz coil are coaxially arranged, and the magnetic field direction of the Helmholtz coil is perpendicular to the electric field direction from the radio frequency positive electrode to the ground electrode. In the discharge area of the CO2 laser amplifier, the strong electromagnetic field restraint system is adopted, the vertical alternating high-voltage electric field and the vertical alternating high-voltage magnetic field are used for restraining plasma movement, the electro-optical conversion efficiency can reach about 20%, the CO2 laser power can be effectively improved, and the arc discharge problem under the high radio frequency power injection condition is avoided.

The invention provides a high-precision voltage-stabilizing constant-current power supply for continuous discharge of a CO2 laser, which relates to the technical field of high-voltage voltage-stabilizing constant-current power supplies and comprises a high-voltage direct-current voltage-stabilizing power supply and a high-impedance amplification loop. The high-voltage direct-current voltage-stabilized power supply is boosted by a transformer, rectified by a rectifier bridge and stabilized by a filter capacitor, and continuously adjustable high-voltage output of 0-30kV is provided; the high-impedance amplification loop is composed of an operational amplifier, a three-stage triode amplification circuit and an electronic tube, the output impedance reaches up to 650 megohms, and the high-impedance amplification loop has the excellent constant-current characteristic. The power supply can accurately adjust the output current in the range of 0-30mA, the current fluctuation is less than one thousandth, the power supply can continuously and stably operate for more than 18 hours, and the power supply is suitable for laser discharge control in a high-temperature and high-density plasma environment. According to the invention, high-precision output is realized by adopting common performance devices, the advantages of voltage resistance, overload resistance and cost are considered, and the problems of poor current stability and inconvenient adjustment of a traditional laser power supply are solved.

The trachea cannula comprises a cannula body, a fixing air bag, an anti-burning air bag and an anti-burning layer, on the first hand, the cannula body can be a hose, the cannula body can directly pass through the glottis, it is avoided that airflow influences the stability of tissue in an operation area, and the operation stability and safety are guaranteed; secondly, an anti-burning air bag can be arranged on the subglottic part, the air pipe and the glottis are directly blocked through the anti-burning air bag after the anti-burning air bag is ventilated, and the subglottic air pipe is prevented from being damaged by CO2 laser in the operation process; thirdly, the surface of the anti-burning air bag is covered with an anti-burning layer made of a contractile flame-retardant material, and serious complications caused by spontaneous combustion induced in the CO2 laser operation process can be prevented; fourthly, through the arrangement of an anti-burning air bag and an anti-burning layer, the gap between the glottis and the airway can be completely sealed conveniently, and the situation that bleeding and seepage flow into the airway in the operation process to cause related complications of the lung is prevented.

The utility model discloses gantry type five-axis CO2 laser cutting equipment, and relates to the technical field of laser cutting. Comprising an equipment cabinet, an upper cover is fixedly connected to the top face of the equipment cabinet, a five-axis movement mechanism, a clamping jig and a laser are arranged in the upper cover, a light outlet nozzle used for conveying laser emitted by the laser is installed at the end, facing the clamping jig, of the five-axis movement mechanism, and the five-axis movement mechanism is arranged above the clamping jig; an automatic roller shutter door is installed on one side of the upper cover, a U-shaped groove is formed in the top face of the side, facing the automatic roller shutter door, of the equipment cabinet, and a smoke suction mechanism is arranged on the inner wall, facing the automatic roller shutter door, of the U-shaped groove. A feeding mechanism used for conveying the PE film is arranged on one side of the equipment cabinet, and the feeding mechanism is arranged on one side of the automatic roller shutter door and communicates with the U-shaped groove. The special-shaped component machining device is suitable for various shapes, can effectively machine complex special-shaped components in a wider compatible range, and can meet various parameter requirements.

The utility model relates to the technical field of optical fiber cladding processing, in particular to CO2 laser etching optical fiber cladding processing equipment which comprises a machine frame and an optical fiber body, two clamping assemblies used for clamping the optical fiber body are symmetrically arranged on the front side of the machine frame, and an X-axis overall driving mechanism used for driving the clamping assemblies to move is fixedly installed at the inner bottom of the front side of the machine frame. According to the device, an ablation mechanism and a scattering mechanism are combined, high-efficiency stripping of cladding light power is achieved, the performance of an optical fiber in laser transmission, sensing and other applications is greatly improved through the characteristic, energy loss and signal interference caused by cladding light are effectively reduced, the CO2 laser ablation technology is adopted, and the laser ablation efficiency is improved. The device can accurately control the distance and the ablation depth in the etching process, optical fibers with different specifications and requirements can be finely processed by adjusting parameters of the laser emission assembly, it is ensured that etching of each part meets the preset standard, and the consistency and stability of processing are greatly improved.

This invention provides a sterile filling method and system that avoids or reduces the risk of disinfectant residue and achieves effective sterilization in a short time. One sterile filling method is a method for filling a sterilized container with contents, comprising: laser irradiation treatment, irradiating the container or container preform with a CO2 laser to sterilize the container surface; and filling treatment, filling the container with contents.

The utility model belongs to the technical field of optics, and discloses a CO2 telecentric scanning field lens, which is applied to CO2 laser and comprises a first lens, a second lens, a third lens and a protective lens which are sequentially arranged along the incident direction of a light beam, the first lens is a negative-focal-power lens of a meniscus structure, the second lens is a positive-focal-power lens of a meniscus structure, the third lens is a positive-focal-power lens of a biconvex structure, the protective lens is of a flat plate structure, the concave surfaces of the first lens and the second lens face the laser incident direction, and the concave surfaces of the first lens and the second lens face the concave surface of the third lens. The lenses form negative-positive-positive focal power distribution, compact distribution and aberration correction are achieved, it is ensured that a laser beam keeps vertical incidence in the whole machining field of view, the problem of focus offset caused by light beam inclination of a traditional field lens is solved, the focusing difference between paraxial light beams and marginal light beams is eliminated, the phenomenon that the edge of a drilled hole has taper is avoided, and the machining precision of the drilled hole is improved. The rejection rate is effectively reduced and the product performance and reliability are improved.

The utility model relates to a flat wire paint removing device in the technical field of flat wire motor stator production. The flat wire paint removing device comprises a CO2 laser generator, a first translation rotating shaft, a beam expander, a first reflecting mirror, a galvanometer, a field lens, a second translation rotating shaft, a second reflecting mirror and a third translation rotating shaft, the first reflector is fixed at one end of the second translation rotating shaft, and the second reflector is fixed at the other end of the second translation rotating shaft; one end of the third translation mirror is connected with the second reflector, and the other end of the third translation mirror fixes the galvanometer; and the field lens is positioned on the galvanometer. According to the utility model, the degree of freedom of the galvanometer and the scene is improved, so that the diversified layout application of the CO2 laser is not limited by the layout caused by the large size of the laser generator, and the application of the CO2 laser in a three-dimensional space can be realized.

The invention discloses a closed CO2 laser adopting diffusion cooling and longitudinal direct current discharge, and belongs to the technical field of laser beam combination, and the closed CO2 laser comprises a vibration suppression component which comprises a beam combination assembly, a laser used for emitting laser beams is arranged in the beam combination assembly, and a reflex reflector used for reflecting the laser beams is arranged in the beam combination assembly. An optical element used for transmitting and reflecting different laser beams is arranged in the beam combining assembly, through accurate light distribution of a reflex reflector and the optical element, reflection and transmission cooperative beam combination of four paths of laser beams with different polarization and different wave bands is achieved, and finally the four paths of laser beams are combined into one laser beam to be output. On the premise of keeping the original beam quality of the single-path laser, the power of the combined beam is increased by several times; and the beam combining light path is accurately matched with the light emitting path of the laser, additional optical loss is avoided, the light spot uniformity, the coaxiality and the polarization characteristic of the combined laser beams are guaranteed, and the strict requirement of industrial precision machining for the quality of the laser beams is met.

The application provides a fused quartz microlens array preparation device and method based on CO2 laser ablation rapid removal and fused quartz microlens array preparation method, and belongs to the field of photochemical processing. In order to solve the problems of high cost, poor thermal stability and difficult to control the machining precision when machining the microlens array of the fused quartz hard and brittle material, and difficult to obtain the low-cost and high-quality microlens array. The coupling model of thermodynamics and fluid mechanics is established, the rough machining structure is simulated to determine the rough machining parameters, the best scanning track is obtained through path planning, the high-power density CO2 laser is used for ablation removal of the fused quartz, and the rapid forming of the microstructure is realized; the low-power density CO2 laser is used for irradiating the microstructure, and the precise fusion polishing is realized. Through the use of a set of CO2 laser for machining the microlens array, the machining cost is reduced, the problem of repeated installation and positioning of the workpiece is avoided, the machining efficiency is further improved, and the high-quality microlens array is prepared with high efficiency and low cost.

The application provides a magnetic control flexible CO2 laser few-mode multi-core energy transmission optical fiber and a preparation method thereof. The magnetic control flexible CO2 laser few-mode multi-core energy transmission optical fiber has at least two independent laser transmission structures, a polymer cladding layer wrapped around the outer periphery of the laser transmission structure, and a magnetic outer cladding layer wrapped around the outer periphery of the polymer cladding layer, a single laser transmission channel outputs less than two modes of CO2 laser, and the adjustable controllability of the optical fiber output light field is realized, while the flexibility, robustness and actuation of the optical fiber are ensured. By controlling the fiber core diameter or the refractive index difference of the core cladding material, the single optical channel laser single-mode or few-mode output can be controlled, by controlling the number, position, distance and adding the inter-channel polymer of the optical fiber laser transmission channel, the optical crosstalk between channels can be reduced, the output light field of the optical fiber can be precisely adjusted, by controlling the magnetic particle doping amount, diameter and external magnetic field of the magnetic outer cladding layer, the movement and turning of the optical fiber can be controlled, and high-precision minimally invasive surgical medical operation is realized.

This invention discloses a method for calibrating the internal optical path of a high-power CO2 laser, relating to the field of laser calibration technology. The method includes: connecting a CCD camera to a collimating telescope and displaying the image in real-time on a computer; installing a first fixture on the output window mount and a second fixture on a first corner mount, illuminated by an LED light source; focusing the fixture, using coarse and fine adjustments on the telescope support to simultaneously align the crosshairs with the centers of the two fixtures; sequentially transferring the second fixture to the second and third corner mounts, and adjusting the upper corner mount to align the crosshairs with the center of the transferred second fixture; installing a third fixture on the tail mount and illuminating it, adjusting the third corner mirror and the tail mount to align the crosshairs with the center of the third fixture, then removing the third fixture and installing the tail mirror; removing the first fixture and installing the output window mirror, adjusting the output window mount to align the crosshairs with its imaging center to complete the calibration. This method achieves rapid and high-precision calibration, ensuring calibration consistency and obtaining optimal light output performance.

The application discloses a quartz glass laser welding method and an atomic cell, and belongs to the technical field of atomic cell packaging. The method is characterized in that first and second quartz glass components are butted to form a joint interface, and CO2 laser beams are used for welding, which is divided into two steps of pre-welding and main welding. In the pre-welding, a first laser power is used for scanning to form a plurality of discrete fusion points to fix the components; in the main welding, a second laser power larger than the first laser power is used for continuous scanning to form a sealing weld. The interval between adjacent fusion points formed by the pre-welding is less than 1.5 times the diameter of a main welding spot, so that the main welding weld can completely cover and fuse the discrete points, and the weld is continuous and uniform. By controlling the laser power and the scanning speed, the weld penetration is stabilized at 0.5 mm-2 mm, the air tightness is better than 8*10 ‑11 Pa·m³ / s, and the heat affected zone width is less than 1.5 mm. The application further discloses an atomic cell prepared by using the method, which can avoid component displacement and stress concentration, realize sealing welding with high air tightness and low heat affected zone, and improve the long-term stability of the atomic cell.

The present invention provides a method of cutting a composite material without causing cracks in the end surface of a brittle material layer after cutting and severe thermal degradation in the end surface of a resin layer after cutting, and the cut composite material can obtain sufficient bending strength. The present invention relates to a method of cutting a composite material (10) in which a brittle material layer (1) and a resin layer (2) are laminated, the method including: a resin removal step of irradiating the resin layer with laser light (L1) oscillated by a CO2 laser light source (20) along a cutting predetermined line (DL) of the composite material to form a processed groove (24) along the cutting predetermined line; and a brittle material removal step of irradiating the brittle material layer with laser light (L2) oscillated by an ultrashort pulse laser light source (30) along the cutting predetermined line after the resin removal step to form a processed trace (11) along the cutting predetermined line. The processed trace formed in the brittle material removal step is open at the resin layer side and does not penetrate the brittle material layer.

The application discloses a method for cleaning a large-diameter optical element in situ by using a CO2 laser and low-pressure plasma, and comprises the following steps: cleaning a contaminated optical element by using a CO2 laser and low-pressure plasma combined cleaning system; designing a CO2 laser cleaning route, setting laser cleaning parameters, and cleaning the optical element by using the CO2 laser; setting low-pressure plasma cleaning parameters, and cleaning the optical element by using the low-pressure plasma; comparing performance parameters of the optical element before contamination, after contamination, after CO2 laser cleaning, and after low-pressure plasma cleaning; and optimizing the cleaning parameters to obtain optimal cleaning parameters for cleaning the large-diameter optical element in situ by using the CO2 laser and the low-pressure plasma. The application can realize high-efficiency and non-damage cleaning of the large-diameter optical element in situ, and effectively solves the problems of surface damage during laser cleaning of the precision optical element and low cleaning efficiency of the low-pressure plasma.

The application provides a Q-switching device for a waveguide CO2 laser, which can improve Q-switching output peak power, output stable and reliable high-quality light beams for a long time, and is beneficial to miniaturization of the laser. The application is suitable for the waveguide CO2 laser, the stroke of the piezoelectric ceramic can be changed between dozens of microns and dozens of millimeters, and the stroke distance is precisely controlled in a closed loop by a ceramic controller, so that the Q-switching is easily realized, the application has a simple structure, does not need to insert a complex Q-switching element in a resonant cavity, the coupling loss of a waveguide port is greatly reduced, and the Q-switching output peak power is improved. The piezoelectric ceramic has the characteristics of high precision, good stability and long service life, so that the stable and reliable high-quality light beams can be output for a long time, the piezoelectric ceramic has a small volume, the overall structure of the laser is more compact, and the miniaturization of the laser is beneficial.

The invention discloses a manufacturing method for a roundabout-shaped blind groove of a multi-layer PCB, and relates to the technical field of multi-layer PCB processing and manufacturing. According to the method, when the prepreg is windowed, a prepreg medium in a bridging region right above a process line is reserved, so that the island bottom prepreg is connected with a parent prepreg through the bridging region, and the problems of layering and glue overflowing caused by the fact that the island bottom prepreg is isolated and cannot be positioned due to full windowing are solved; a PI adhesive tape is attached to the bottom face of a core plate to be uncovered, only the PI adhesive tape over a bridging area is removed, adhesive blocking of the non-bridging area of the groove bottom is achieved, and meanwhile shielding protection is provided for medium ablation of the non-bridging area of the groove bottom when the adhesive face of the bridging area is removed through follow-up laser. According to the method, after lamination and outer layer circuit manufacturing, depth-controlled milling thinning is carried out on a bridging area, and then a prepreg medium remaining on the surface of a process line is accurately removed through CO2 laser ablation, so that the problems that in a traditional windowing-free process, glue is difficult to accurately remove through depth-controlled milling, and a circuit or a medium at the bottom of a groove is easily damaged are solved.

The application discloses a multifunctional coating preparation method for laser cladding and antireflection composite of photovoltaics, and belongs to the technical field of photovoltaic materials. First, inorganic down-conversion powder is dispersed in organic resin, and after ultrasonic stirring, the down-conversion organic pre-coating layer is obtained by coating the glass substrate and drying. Then, a CO2 laser is used to selectively remove the organic resin at a rated power of 1% to 3% and a linear speed of 800 to 1000 mm / s, to form an inorganic down-conversion layer, and the performance is optimized by adjusting the powder content, type and laser parameters. Finally, a single-side pulling method is used to form a SiO2 antireflection film on the surface of the inorganic layer, and the down-conversion-antireflection composite coating is prepared after high-temperature short-time sintering. The application integrates light conversion and antireflection functions, and the process is simple and controllable, and is suitable for performance improvement and industrial application of photovoltaic glass surfaces.

The present invention relates to a method of inducing an antibacterial peptide in the body of an insect. A method for inducing an antibacterial peptide in an insect by damaging the insect, which is characterized by irradiating the epidermis of the insect with a laser beam and damaging the insect by opening a hole penetrating through the epidermis of the insect with the laser beam in a state in which the insect is not damaged that cannot be recovered; a device for use in a method for inducing an antibacterial peptide in an insect body, the device comprising a CO2 laser irradiation device, a position information acquisition means for obtaining position information of the insect, and a means for transmitting the position information of the insect obtained by the position information acquisition means to the position information of the insect; use of a CO2 laser in a method of inducing an antibacterial peptide in the body of an insect by opening pores through the epidermis of the insect.

The invention discloses a nano flower-shaped electrocatalyst synthesized based on pulse CO2 laser induction and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving copper nitrate and magnesium nitrate in a mixed solution of distilled water and ethanol at room temperature to obtain a solution A; adding an ethanolamine solution into the solution A, and after blue precipitates appear, standing, centrifuging and drying to obtain an electrocatalyst precursor material; grinding the precursor material into powder, uniformly laying the powder on a PI film, placing the PI film in an air atmosphere for CO2 laser induction, cooling the product to room temperature after the CO2 laser induction is finished, washing the product, drying and grinding the product into powder, and finally obtaining the nano flower-shaped electrocatalyst Ly-Mg / CuxO. According to the method, instantaneous pulse CO2 laser induction is utilized, the method is novel, the preparation process is simple, and the magnesium-doped multivalent copper oxide (L4-Mg / CuxO) electrocatalyst synthesized by the method can be used as a dual catalyst applied to preparation of ethanol from eCO2RR and a lithium carbon dioxide battery and has important practical significance.

This invention discloses a laser welding method for quartz glass and an atomic gas chamber, belonging to the field of atomic gas chamber encapsulation technology. The method involves butt-joining first and second quartz glass components to form a bonding interface, and then welding using a CO2 laser beam, divided into two steps: pre-welding and main welding. During pre-welding, a first laser power scan is used to form multiple discrete weld points to fix the components; during main welding, a higher second laser power is used for continuous scanning to form a sealing weld. The spacing between adjacent weld points formed in the pre-welding is less than 1.5 times the diameter of the main welding spot, ensuring that the main weld completely covers and fuses the discrete points, guaranteeing a continuous and uniform weld. By controlling the laser power and scanning speed, the weld penetration depth is stabilized at 0.5 mm to 2 mm, with an airtightness better than 8×10⁻⁶ mm. ‑11 Pa·m³ / s, with a heat-affected zone width of less than 1.5 mm. This invention also discloses an atomic gas chamber prepared using this method, which can avoid component displacement and stress concentration, achieve high airtightness and low heat-affected zone sealing welding, and improve the long-term stability of the atomic gas chamber.

This invention relates to a laser cladding apparatus and method. The laser cladding apparatus includes a laser emitter, a cladding nozzle system, a powder feeding system, and a lens optical path system. The laser emitter is a CO2 laser emitter emitting a Gaussian beam. The cladding nozzle system includes a cooling water circulation pipe, a focusing mirror, a nozzle body, a protective mirror, and the nozzle itself. The powder feeding system is bi-pronged in shape, including two powder inlets and one powder outlet, with powder delivered via gas. The lens optical path system includes a support, a collimating mirror, a triangular conversion mirror, a flat-top beam shaping mirror, a circular beam shaping mirror, and a rectangular beam shaping mirror. This invention achieves beam type and beam shape conversion through the triangular conversion mirror and the shaping mirror, thereby adapting to different workpieces and improving work efficiency. The cooling water circulation pipe within the cladding nozzle system cools the focusing mirror, extending the lifespan of the apparatus.

A path indicator light system for a CO2 laser and its operating method are disclosed. The system includes a CO2 laser and is characterized by further including a movable indicator light output device. The indicator light output device can be moved to the optical axis of the CO2 laser (i.e., the working position) or moved away from the optical axis of the CO2 laser to a standby position. When the indicator light output device is located on the optical axis of the CO2 laser, the indicator light emitted by the device is coaxial with the optical axis of the CO2 laser. Based on the characteristic that CO2 lasers and indicator light semiconductor lasers are not used simultaneously, this invention designs a novel CO2 laser indicator light system using a combination of mechanical and electronic control technologies. This avoids the use of power components such as beam combiners, improving the reliability of the laser and the lifespan of the indicator light.

A pulsed laser system includes a laser that delivers a light pulse to an optical shutter configured to transmit, of the pulse: (a) a first transmitted portion having a rise time of less than 20 ns and a first portion peak power, then (b) a second transmitted portion having an initial power less than the first portion peak power, and then (c) a third transmitted portion having an energy of at least 100 nJ and a duration of less than or equal to 200 ns. A low voltage driver (to control transmission of the first transmitted portion) can be connected to an EOM in the optical shutter in parallel with a high voltage driver (to control transmission of the third transmitted portion), with electrical isolators positioned the outputs of the respective voltage drivers to protect the low voltage driver.

To provide a method for inducing an antimicrobial peptide into the body of an insect.MEANS FOR SOLVING THE PROBLEM: In the method for inducing the antimicrobial peptide to the insect by damaging the insect, the epidermis of the insect is irradiated with a laser beam to induce the antimicrobial peptide to the insect in a state not imparting unrecoverable damage to the insect. An apparatus for use in a method for introducing an antimicrobial peptide into the body of an insect, comprising a CO2 laser irradiation device, position information obtaining means for obtaining position information of the insect, and means for transmitting the position information of the insect obtained by the position information obtaining means as position information of the insect, and use of a CO2 laser in a method for introducing an antimicrobial peptide into the body of an insect by making a hole through the epidermis of the insect.SELECTED DRAWING: Figure 1

Disclosed in the present invention are a laser cutting and oxidation prevention processing method for an inner-layer resistor to improve resistance precision. The method comprises: determining parameters of laser cutting on the basis of the material, dimensions and required resistance change of a resistor, and making preparations before laser cutting of the resistor; accurately positioning the prepared resistor on a laser cutting workstation, and selecting a suitable cutting method to cut the resistor on the laser cutting workstation; and a laser cutting machine cutting the resistor on the basis of the preset parameters, and testing the surface of the cut resistor. By trimming the edges of the resistor that has been etched twice, the width direction precision of the resistor can reach + / -5 μm, thereby improving the resistance tolerance from + / -10 % to + / -2 %. Resistor laser cutting is used to dimensionally trim a completed resistor, and the resistor with uneven edges is trimmed by a CO2 laser optical path, such that the resistor dimensions become uniform and the dimensions are closer to the theoretical width. After etching and laser trimming of the resistor are completed, resin is coated on the resistor to achieve protection of a resistor layer.

The invention relates to a method for preparing homogeneous lithium-calcium-silicon bioactive glass based on a container-free processing technology and an application of the homogeneous lithium-calcium-silicon bioactive glass. The chemical composition of the homogeneous lithium-calcium-silicon bioactive glass is LixCaySizOn, wherein x + 2y + 4z = 2n, 2 < = x < = 4, 2 < = y < = 4, 1 < = z < = 6, and 5 < = n < = 18; the method for preparing the homogeneous lithium-calcium-silicon bioactive glass based on the containerless processing technology comprises the following steps: (1) preparing lithium calcium silicate ceramic powder by adopting a sol-gel method; (2) carrying out compression molding on the calcium silicate lithium ceramic powder, and sintering to obtain a calcium silicate lithium ceramic block; (3) under a container-free air suspension condition, heating the lithium calcium silicate ceramic block body to a molten state by adopting CO2 laser, so as to obtain a suspended spherical lithium calcium silicate melt; and (4) cutting off the laser, and rapidly cooling the lithium calcium silicate melt to room temperature to obtain the homogeneous lithium-calcium-silicon bioactive glass.

The invention belongs to the field of laser testing, and provides an ultra-low retroreflection laser power testing device, which comprises a beam expanding system lens group; the beam expanding system lens group is configured to perform beam expanding on the high-power laser to be measured so as to reduce the laser power density; the wedge-shaped mirror is used for receiving the laser beam-expanded by the beam-expanding system mirror group and reflecting the laser with laser energy smaller than a preset value; the power meter receives the laser energy smaller than a preset value and calculates the laser power of the high-power laser to be measured based on the laser energy smaller than the preset value; the liquid medium attenuation absorber comprises a high-pressure sealing cavity and liquid arranged in the high-pressure sealing cavity, the wedge-shaped mirror serves as an incidence window and is arranged on one side of the high-pressure sealing cavity, and the liquid is configured to absorb laser energy transmitted by the wedge-shaped mirror. The stability, reliability and safety of the MOPA laser system in the testing process are improved, and accurate measurement of high-power CO2 laser in an EUV photoetching light source is achieved.

The utility model discloses a novel connecting elbow structure of a folded-cavity CO2 laser. The novel connecting elbow structure is characterized by comprising a reference plane, two vertical glass tubes, two total reflective mirrors and a parallel glass tube, two through holes are formed in the reference plane; two vertical glass tubes are respectively sintered on the two through holes; the parallel glass tube is connected with the two vertical glass tubes; and the two total reflective mirrors are respectively assembled at corners where the parallel glass tubes are connected with the vertical glass tube. According to the utility model, the geometric constraint among the components is realized, and the definite and unique spatial configuration among the components is ensured; through the structure, the problem of precision control during manual manufacturing of the adapter elbow is effectively solved, the phenomenon of optical axis concentricity imbalance caused by geometric tolerance of the adapter elbow during assembly of the laser tube main body and the adapter elbow is greatly reduced, the operation mode of the laser is stable, the power loss of the laser is reduced, and the service life of the laser is prolonged.

The application discloses a sapphire optical fiber micro-cavity high-temperature-resistant pressure sensor and a preparation method thereof. The preparation method comprises processing of a homogenous and different-diameter sapphire optical fiber end face, in particular, a femtosecond laser dry etching processing method for a large-diameter sapphire optical fiber end face, and a sapphire optical fiber inner groove end face processing method based on a CO2 laser heating technology. The application also discloses a homogenous and different-diameter sapphire optical fiber fusion method based on an arc discharge technology, so that a complete micro-cavity is formed between a fusion point and a ground end face. The micro-cavity can form a Fabry-Perot interference cavity, and when the cavity is affected by temperature and pressure, the cavity length will change accordingly. The pressure or temperature of an external environment can be calculated by measuring the change of the cavity length. The sapphire optical fiber micro-cavity high-temperature-resistant pressure sensor prepared by the technical scheme has high melting point, high hardness, and electromagnetic interference resistance.