115 results about "High power lasers" patented technology

The invention belongs to the technical field of laser manufacturing and green manufacturing, and discloses an ultrahigh-power laser low-loss repair method for deep defects of a thick plate, which comprises the following steps: identifying the positions, types and three-dimensional shapes of the surface and deep defects (pores and cracks) of the thick plate through a phased array ultrasonic detection module (PAUT); on the basis, a laser space energy distribution repairing path for specific defects is automatically planned; carrying out an ultra-high power laser defect remelting process; finally, whether the surface and the deep part of the thick plate have defects or not is recognized again through the ultrasonic detection module, low-damage repair of the deep part defects of the thick plate is achieved, and the use efficiency and the service life of a repaired part are improved.

The invention relates to the technical field of semiconductors, and discloses an edge-emitting semiconductor laser and a preparation method thereof, and the preparation method comprises the steps: forming a current injection region and a passivation layer at the side part of the current injection region on the surface of one side, opposite to an upper limiting layer, of a P-surface contact layer of a laser wafer; the laser wafer is divided into a plurality of laser chips in the vertical direction through a plurality of first cleavage channels and a plurality of second cleavage channels; forming a first P-type metal layer on the surface of the laser chip, the surface of the first cleavage channel and the surface of the first region of the second cleavage channel; forming a second P-type metal layer on the surface of one side of the first P-type metal layer of the laser chip through an electroplating process; the first P-type metal layer in the first region is used for communicating the surfaces of the plurality of laser chips; the laser wafer is cleaved into a plurality of edge-emitting semiconductor lasers. Compared with the prior art, the reliability and the yield of the edge-emitting high-power laser can be improved, and the cost of a preparation process is reduced.

The invention relates to a reflective high-precision high-power laser optical axis calibration method, which comprises the following steps of: coarse alignment: enabling a reflecting light plate and an emergent light plate to be visible on a black paint plate; adjusting the posture of the reflector, and moving the reflection light spot; calculating a light spot center position by an image, and establishing an angle and position function relationship; the deviation angle is inversely calculated through the position difference, and the reflector is strictly perpendicular to the optical axis. According to the reflective high-precision high-power laser optical axis calibration method, on the premise that an oversized and overweight laser is not moved, other elements are moved, calibration of the laser optical axis is completed under the condition that the requirement for the spatial distance is not large, vibration can be reduced, and devices can be protected.

The invention provides a high-power refrigerant direct-cooling laser without a cold plate, which comprises a pump source module, a resonant cavity module, an optical device module and an electrical device module, and is characterized in that an optical chip in the pump source module is fixed on a box-type first base, a pipeline is pre-buried in the first base, and the pipeline contains a refrigerant; an optical fiber in the resonant cavity mode is wound in an optical fiber groove in a columnar second base in a three-dimensional manner, a pipeline is arranged in the heat dissipation base, and a refrigerant is arranged in the pipeline; an optical fiber in the optical device module passes through a third tubular base, a pipeline is arranged in the third base, and a refrigerant is arranged in the pipeline; electrical devices in the electrical device module are arranged on a box-type substrate, a pipeline is arranged in the substrate, and a refrigerant is arranged in the pipeline. A traditional cold plate is removed, devices with flow channels are connected together to form a cooling loop, the devices of the laser are fixed on a base to form a stable structure, and the modularized high-power laser is formed.

The utility model discloses a TO tube socket for a high-power laser, which relates to the technical field of semiconductors, and comprises a bottom plate, a metal radiating element, a sealing part and a lead, the metal radiating element is fixed on the bottom plate, the bottom plate is provided with a through hole for the lead to pass through, the sealing part is sleeved on the periphery of the lead, and the sealing part is fixed in the through hole. The LED lamp is fast in heat dissipation, good in heat dissipation effect, small in size and easy to package.

The utility model relates to the technical field of additive manufacturing, in particular to a one-drag-N optical path system for LPBF forming and a 3D printer. The light path system comprises a first movable mirror base, a first spectroscope, a first linear driving unit and a first reflecting mirror. Wherein the first movable lens base is provided with a first light hole, and the first spectroscope is arranged in the first light hole; the first spectroscope is configured to be capable of dividing a laser beam projected on the first spectroscope into a reflected beam and a transmitted beam; the first linear driving unit can drive the first movable lens base to move linearly. In use, after a laser beam is projected to the first spectroscope, a transmission beam is projected to a first laser demand end, a reflection beam is reflected to the first reflector, and the first reflector reflects the reflection beam to a second laser demand end. The laser beams of one laser can be supplied to the two laser demand ends, the high-power laser can be used, and compared with the mode that each printing device is provided with a low-power laser, the overall cost is lower.

The disclosure provides a laser, a preparation method of the laser and an optical module, and relates to the technical field of optical elements, so as to meet the demand of the optical module for high-power lasers. The laser comprises the following steps: growing an etching auxiliary layer on the surface of a wafer body of the laser, the longitudinal etching rate of the wafer body is greater than the transverse etching rate of the wafer body, the transverse etching rate of the etching auxiliary layer is greater than the transverse etching rate of the wafer body, and the wafer body comprises a quantum well layer; forming a mask layer above the etching auxiliary layer, and pre-treating the mask layer to form a BH pattern; etching the BH pattern, so that the top of the wafer body is etched into a BH mesa, the etching depth is below the quantum well layer, and the etching depth is below the quantum well layer; growing a current blocking layer on both sides of the BH mesa; removing the mask layer and the etching auxiliary layer; and forming a P-InP layer on the top of the BH mesa and the current blocking layer.

The invention provides an optical fiber patch cord for high-power laser transmission, which comprises a transmission optical fiber and two sections of solid protection optical fibers, and the transmission optical fiber is constructed into a hollow-core optical fiber with an optical transmission channel and is suitable for guiding laser to propagate along the extension direction of the transmission optical fiber. The two sections of solid protection optical fibers are welded to the two ends of the transmission optical fiber respectively and are configured to block an optical transmission channel of the transmission optical fiber and allow laser to penetrate through so as to enter the transmission optical fiber.

The application belongs to the technical field of laser optics, and particularly relates to a heat distortion resistant mirror seat for a high-power laser system; the mirror seat comprises a seat body, a plurality of convex bosses for limiting a mirror are arranged on the inner side wall of the seat body, a contact plate for bearing the mirror is arranged in the frame of the seat body, a group of heat dissipation fins are arranged on the bottom of the contact plate, flexible grooves and threaded holes are respectively arranged in the frame of the seat body at positions corresponding to the convex bosses, a flexible pressing ring is fixed to the top end of the seat body through the threaded holes and is used for pressing the mirror, mounting holes corresponding to the threaded holes are arranged on the flexible pressing ring, and a flexible groove of the pressing ring is arranged on the inner side of each mounting hole; the application is suitable for the working condition that the temperature of the mirror continuously rises, can effectively reduce the temperature level of the mirror, and effectively solves the mirror surface shape distortion problem caused by the fact that the mirror seat extrudes the mirror due to the mismatch of the thermal expansion coefficients of the mirror seat and the mirror.

The application discloses a high-power laser beam inter-delay measurement device, when the relative time delay is measured in a base frequency band, a signal emitted by a clock reference is connected to a first channel of a high-speed oscilloscope in an electrical signal mode, and a pulse output by a main laser system with a high repetition frequency is received by a first photoelectric tube and converted into an electrical pulse and connected to a second channel of the high-speed oscilloscope; when the relative time delay is measured in a three times frequency band, three times frequency analog light is received by a second photoelectric tube after passing through terminal optical elements and converted into an electrical pulse and connected to a third channel of the high-speed oscilloscope. The application measures the time delay by segmenting and dividing wavelengths, and finally accumulates the total delay to determine the time delay of each light beam relative to the reference at a target point. The high-precision measurement of the inter-beam delay can be realized without adding new equipment by using the existing main laser system with a high repetition frequency, three times frequency analog light source and other equipment, the principle and structure are simple, the cost is low, and the engineering implementation is easy.

The utility model provides a series-parallel connection structure of optical isolation driving semiconductor switches, which relates to the field of semiconductor switches and comprises a plurality of groups of optical isolation driving semiconductor switches and a plurality of series-parallel connection metal plates, and the series-parallel connection metal plates enable the optical isolation driving semiconductor switches in the same group to be connected in series. The series and parallel metal plates connect the plurality of groups of optical isolation driving semiconductor switches in parallel; the driving boards are connected through a plurality of driving board supporting columns, and each driving board comprises a driving module and a photoelectric conversion module; according to the scheme, the laser array module is driven by using the laser array as the light source of the optical isolation driving semiconductor switch, and the optical isolation driving semiconductor switch can be driven by using the received optical signal from the laser array module. Energy optical fibers and high-power lasers are not needed, the application cost of the optical isolation driving semiconductor switch is remarkably reduced, and the economical efficiency of the optical isolation driving semiconductor switch is further improved.

The application provides a mirror thermal management mechanism and heat dissipation method for a high-power laser processing head, and belongs to the technical field of laser processing. The mirror thermal management mechanism comprises a galvanometer mirror module and a thermal management module. The galvanometer mirror module comprises a galvanometer mirror. The galvanometer mirror comprises a substrate, a first optical film layer and a second optical film layer. The substrate is transparent to working wavelength laser and has opposite first and second surfaces. The first optical film layer is arranged on the first surface and is used for reflecting laser incident on the first surface. The second optical film layer is arranged on the second surface and is used for transmitting laser transmitted through the substrate out of the second surface. The thermal management module comprises a liquid cooling plate. The liquid cooling plate has a light absorption surface and is arranged in a spaced manner with the second surface. The thermal management mechanism can meet the thermal management requirements of the galvanometer mirror in the high-power laser welding process.

The invention relates to an inclinable high-power efficient heat dissipation device. A heat dissipation main body of the device comprises a heat dissipation cavity and heat dissipation fins which are integrated; the heat dissipation cavity is of a flat barrel-shaped structure, and a phase change working medium is poured into the heat dissipation cavity. Vertical heat dissipation fins which are parallel to one another are distributed on the side wall of the top of the heat dissipation cavity; the backflow body assembly is of a combined structure formed by stacking materials with capillary force capacity, the inner surface of the side wall of the bottom of the heat dissipation cavity serves as a backflow body connecting face, and the backflow body assembly is pressed and fixed to the backflow body connecting face through the backflow body fixing plate. The middle of the outer surface of the bottom side wall of the heat dissipation cavity is a heat source fixing area. The efficiency of the heat dissipation device of high-power heating devices and equipment is improved, meanwhile, the heat dissipation capacity of the device in an angle inclination use scene can be guaranteed, and the heat dissipation device can be applied to energy-saving heat management of LED lamps, high-performance computers, high-power lasers and high-power power electronic equipment.

The present application relates to an eye safety interlock for fiber coupled high power laser sources. A system is presented for continuously monitoring the integrity of the delivery fiber coupled to the laser source and shutting down the laser source immediately upon identifying any type of cut, break or disconnection along the delivery fiber. A pair of monitoring photodiodes are included with the laser source and used to observe the ratio of reflected light to emitted light, and if this ratio exceeds a given threshold, the laser is shut down. If there is a break, the power of the reflected light will be higher than normal, where a defined threshold is used to determine the calculated intensity indicative of the break. By using a measurement in decibels, the monitoring system only needs to employ the intensity difference to produce the reflected / delivery ratio output.

The application discloses a high-power laser power measuring system and relates to the technical field of laser measurement. The application comprises a measuring mirror, a measuring module and a mirror group. The non-reflective surface of the measuring mirror is connected with the measuring end of the measuring module, and the measuring direction of the measuring module is perpendicular to the reflective surface of the measuring mirror. The mirror group is used for changing the optical path of the incident high-power laser, so that the high-power laser is emitted along the direction of the incident optical path after being reflected by the measuring mirror. The measuring system has the advantages of small volume, light weight, fast response speed, no need of water cooling, on-line measurement, high measurement accuracy and good stability.

The application discloses a kind of high-power laser seed sources for multimodal medical imaging based on germanium saturable absorber, it is characterized in that, including first pump light source, second pump light source and laser resonator, the laser resonator is by first wave division multiplexer, second wave division multiplexer, erbium-doped optical fiber, polarization controller, polarization independent isolator, germanium saturable absorber, single-mode optical fiber, optical coupler sequentially connected, the first pump light source is connected with first wave division multiplexer, and second pump light source is connected with second wave division multiplexer.The germanium saturable absorber prepared in the application has good self-starting effect on pulse, the preparation method is simple, and the preparation cost is not high.And the stability of the obtained saturable absorber is good, and it can be used for passive mode locking for a long time.

The disclosure provides a laser, a preparation method of the laser and an optical module, and relates to the technical field of optical elements, so as to meet the demand of the optical module for high-power lasers. The laser comprises a current blocking layer, and the current blocking layer comprises a P-InP blocking layer, an impurity freezing layer, a first N-InP blocking layer and a second N-InP blocking layer. The method comprises the following steps: introducing a first doping source into an epitaxial growth chamber to form the P-InP blocking layer on both sides of a BH mesa; stopping the introduction of the first doping source and reducing the temperature of the epitaxial growth chamber to a first preset temperature; introducing a second doping source into the epitaxial growth chamber, so that the second doping source penetrates into the surface at the top of the P-InP blocking layer, the top of the P-InP blocking layer is processed to form the impurity freezing layer, and the first N-InP blocking layer is formed above the impurity freezing layer; and the second N-InP blocking layer is formed above the first N-InP blocking layer.

1. Name of the product in this design: Condensation plate. 2. Purpose of this design: To be installed on the outer wall of high-power electronic products such as computer CPUs and high-power lasers for cooling. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application provides a high-power semiconductor laser driving protection circuit, wherein two ends of a first capacitor are connected with a second voltage input end and a first resistor respectively, two ends of a second capacitor are connected with the second voltage input end and a third resistor respectively, the other end of the third resistor is connected with an S pole of a MOS tube, a D pole of the MOS tube is connected with one end of a high-power semiconductor laser, a G pole of the MOS tube is connected with one end of a second stabilizing tube, one end of a fifth resistor is connected with the first voltage input end, the other end of the fifth resistor is connected with the second stabilizing tube, a first stabilizer is connected with the high-power semiconductor laser, and the second resistor and the third capacitor are connected in parallel in a circuit between the first stabilizing tube and the high-power semiconductor laser. The application realizes constant current driving of the high-power device by adjusting the gate voltage of the MOS tube, so that the high-power laser is stably and controllably operated.

The invention relates to an optical fiber output high-power laser homogenizing device special for the laser additive manufacturing industry, which comprises an optical fiber array joint and a connector sleeved on the optical fiber array joint, the connector comprises a connector body, and first mounting through holes are distributed in the array joint body along the vertical direction; second installation through holes are distributed in the installation protruding part in the vertical direction, the first installation through holes and the second installation through holes form an optical fiber fixing channel, and optical fibers are installed in the optical fiber fixing channel. The left side of the array connector body is concaved inwards to form a first water storage groove, the right side of the array connector body is concaved inwards to form a second water storage groove, and a plurality of first water cooling channels and a plurality of second water cooling channels are transversely arranged on the front side and the rear side of the interior of the array connector body and distributed in the longitudinal direction. The two ends of the first water cooling channel and the two ends of the second water cooling channel communicate with the first water storage groove and the second water storage groove correspondingly. The device has the characteristics of simple structure, uniform output light spots and high working efficiency.

The present invention discloses a thick plate laser-arc complementary composite welding device and method based on an energy siphon effect, including a composite welding mechanism and a wire feeding wheel. The composite welding mechanism is composed of an arc welding machine, a high-power laser, a laser welding head and an arc welding torch, and further includes: a repeated driving component, which is arranged at the bottom of the wire feeding shell; a transmission component, which is in transmission connection with the repeated driving component; a bending component, which is arranged on one side of the positioning seat, and the bending component is composed of two groups of adjusting rods and a bending mechanism. The present invention has the advantages that through the mutual cooperation of the repeated driving component, the bending component, the transmission component and the pressing-down component, without affecting the welding work of the arc laser welding mechanism, the uniformity of wire feeding can be effectively improved, thereby effectively improving the welding quality. At the same time, it is applicable to different workpieces and different welding gaps, effectively improving the practicability of the arc laser composite welding equipment.

The present invention relates to a laser cutting method, a laser cutting machine, and a computer program product. The object of the present invention is to provide an improved laser cutting method and an improved laser cutting machine. To solve the object, a laser cutting method is provided, which includes the method steps of: a. cutting a workpiece with a high-power laser cutting beam along a cutting line; b. determining a good or bad cut of the workpiece during cutting of the workpiece; c. scanning the cutting line of the workpiece with a low-power laser scanning beam or irradiation beam and recording the scanning data; d. changing at least one parameter of the laser cutting machine; repeating the method steps a. to c.; and evaluating the scanning data in relation to different parameters of the laser cutting machine in a control device.

The utility model provides a high power laser cladding annular light spot optical system based on conical mirror and double ridge mirror, including the beam combining unit, the conical mirror, third collimating mirror, annular light spot conversion unit and focusing unit who sets gradually along the light path, the beam combining unit is used for the first wavelength laser and second wavelength laser beam combining as a coaxial parallel light, the conical mirror is used for converting parallel light into the annular light that spreads outward, third collimating mirror is used for collimating the divergent annular light as parallel annular light, annular light spot conversion unit is used for converting parallel annular light into vertical annular light, focusing unit is used for focusing vertical annular light to work piece surface, this design realizes preheating - processing - post heat treatment integrated process, effectively reduces the temperature gradient of the molten pool, reduces the defect such as blowhole, crack, improves the cladding layer bonding strength, and effectively reduces the damage probability of protective glass and other components.

The application discloses a manganese-activated fluoride red fluorescent ceramic and a preparation method and application thereof. The manganese-activated fluoride red fluorescent ceramic is prepared by uniformly mixing manganese-activated fluoride red fluorescent powder (or a manganese-activated fluoride matrix and a fluoromanganate) and an additive, then cold-pressing and sintering, and cooling; or the manganese-activated fluoride red fluorescent ceramic is prepared by cold-pressing and sintering manganese-activated fluoride red fluorescent powder (or a manganese-activated fluoride matrix and a fluoromanganate), and cooling. The manganese-activated fluoride red fluorescent ceramic prepared by the application has high light transmittance, can be effectively excited by ultraviolet light, near-ultraviolet light and blue light, emits narrow-band red light of about 630 nm, has an absorption efficiency of blue light greater than 70%, and has an external quantum efficiency greater than 60%. The preparation process of the red fluorescent ceramic is simple, the conditions are mild, the universality is wide, the cost is low, and the red fluorescent ceramic can be applied to the fields of white light LED and high-power laser devices.

The application provides a GaAs high-power laser epitaxial wafer with strain compensation quantum well structure and a preparation method thereof, and belongs to the field of optoelectronics. From bottom to top, the epitaxial wafer comprises a buffer layer, an N confinement layer, an AlGaAs lower waveguide layer, an AlGaAs lower barrier layer, a GaAsP quantum well layer, a GaAs barrier layer one, an InGaAs quantum well layer, a GaAs barrier layer two, a GaAsP quantum well layer, an AlGaAs upper barrier layer, an AlGaAs upper waveguide layer, a P confinement layer and a GaAs ohmic contact layer. The application adds a quantum well larger than the band gap width before and after the quantum well of the epitaxial structure, completes the strain compensation of the quantum well by only using a mode within 10 nm, and further concentrates the light field in the InGaAs quantum well by using the refractive index difference, so that the optical gain of the quantum well is improved. The application completely makes up for the problems of the wide waveguide structure, such as the poor divergence angle and beam quality under the premise of high power.

The invention provides methods and apparatus comprising a laser source that uses a single unfocused pulse of a low intensity but high power laser over a large sample area to collect Raman scattered collimated light, which is then Rayleigh filtered and focused using a singlet lens into a stacked fiber bundle connected to a customized spectrograph, which separates the individual spectra from the scattered wavelengths using a hybrid diffraction grating for collection onto spectra-specific sections of an array photodetector to measure spectral intensity and thereby identify one or more compounds in the sample.

The application discloses a kind of nonlinear characteristic measuring device and test method suitable for thick sample, by light power density equivalence method, the light power density required for exciting thin sample nonlinear characteristics by small power laser beam is equivalent with the light power density required for exciting thick sample nonlinear characteristics by high power laser beam, to realize the purpose of thick sample nonlinear characteristics, such as nonlinear absorption coefficient and nonlinear refractive index measurement.The application adopts long focal length lens focusing, which not only meets the establishment condition of Z scanning and I scanning theory, but also can realize the complement of complete nonlinear characteristic curve.The application is composed of six parts, including laser output unit, energy attenuation unit, beam shaping unit, sample displacement unit, energy detection unit and computing processing unit, which can realize the nonlinear characteristic measurement of optical material with larger thickness range in wide waveband (such as 315nm-11μm), greatly enriching and facilitating the research in the field of material nonlinear.

The disclosure provides a laser, a preparation method of the laser and an optical module, and relates to the technical field of optical elements, so as to meet the demand of the optical module for high-power lasers. The laser comprises the following steps: growing an etching auxiliary layer on the surface of a wafer body of the laser, the longitudinal etching rate of the wafer body is greater than the transverse etching rate of the wafer body, the transverse etching rate of the etching auxiliary layer is greater than the transverse etching rate of the wafer body, and the wafer body comprises a quantum well layer; forming a mask layer above the etching auxiliary layer, and pre-treating the mask layer to form a BH pattern; etching the BH pattern, so that the top of the wafer body is etched into a BH mesa, the etching depth is below the quantum well layer, and the etching depth is below the quantum well layer; growing a current blocking layer on both sides of the BH mesa; removing the mask layer and the etching auxiliary layer; and forming a P-InP layer on the top of the BH mesa and the current blocking layer.

The invention discloses a laser aging test device and method. The device comprises an aging test module and a temperature control module, the aging test module comprises a laser processing assembly and a parameter acquisition assembly, the laser processing assembly and the parameter acquisition assembly are connected through an optical fiber, and laser emitted by the to-be-tested laser passes through the laser processing assembly and then enters the parameter acquisition assembly; the temperature control module comprises a high-temperature water cooling machine and a water path detection assembly; a water inlet and a water outlet at the host position of the to-be-detected laser are communicated with the high-temperature water cooling machine, and the water path detection assembly is arranged in a liquid path between the high-temperature water cooling machine and the to-be-detected laser. And the requirement of high-temperature aging test of a high-power laser device can be met.

The utility model provides a high-power laser assembly. The high-power laser assembly comprises a substrate, an aspheric lens, an optical chip and an optical fiber assembly. The aspheric lens, the optical chip and the optical fiber assembly are sequentially arranged on the same side surface of the substrate; the optical chip is provided with at least N planar optical wavelength export channels, and N is greater than or equal to 4; the optical fiber assembly is provided with a capillary hole through which at least one optical fiber can penetrate, the at least one optical fiber penetrates through the capillary hole and corresponds to the laser incident end of the optical chip, and the laser emergent end of the optical chip corresponds to the incident end of the aspheric lens; compared with a multi-channel coupler adopted at present, the optical chip is adopted to replace the multi-channel coupler, and different calibration positions are modulated, so that the cost of the high-power laser assembly is greatly reduced, mass production is facilitated, the manufacturing cost is reduced, and the laser transmission efficiency and stability of the high-power laser assembly are improved.