81 results about "High power lasers" patented technology

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 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 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 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.

The utility model discloses an embodiment of a kind of heat dissipation device and laser for laser, the heat dissipation device includes pumping source pedestal and liquid cooling plate, pumping source pedestal is used to place laser chip, liquid cooling groove is opened in liquid cooling plate, pumping source pedestal includes pedestal body, and the several radiating fins of setting on pedestal body, pumping source pedestal is attached to liquid cooling plate, and make several radiating fins be inserted in liquid cooling groove, pumping source pedestal and the groove wall of liquid cooling groove are enclosed to form liquid cooling passage, cooling liquid is circulated in liquid cooling passage, therefore, the heat generated by laser chip can be promptly transferred to radiating fin, and then again through radiating fin transfer to cooling liquid in liquid cooling passage, so that the heat of radiating fin can be promptly taken away by cooling liquid, cooling mode using liquid cooling, high heat dissipation efficiency, so that heat dissipation device can satisfy higher power laser chip heat dissipation demand.

The utility model relates to a high-power laser lighting device comprising a plurality of high-power laser sources, each high-power laser source is provided with a laser transmission optical fiber, and each laser transmission optical fiber is provided with a transmitting end face; the optical fiber bundle assembly is formed by combining a plurality of laser transmission optical fibers, and each laser transmission optical fiber is surrounded by a sheath; the fly's-eye lens array is installed in the frame and composed of a plurality of sub-lenses, the sub-lenses are closely arranged, each laser transmission optical fiber in the optical fiber bundle assembly corresponds to one sub-lens in the fly's-eye lens array, and a laser beam output by each laser transmission optical fiber is coaxial with the optical axis of the corresponding sub-lens in the fly's-eye lens array. The frame on which the fly-eye lens array is mounted is adjustable relative to the transmitting end face to output an illumination beam having a predetermined divergence angle. The divergence angle of an output light beam can be freely adjusted in different illumination applications; the mixed divergence angle of the output light beam, the mixed output light beam and the light spot morphology are realized; and the output efficiency is higher.

The application discloses a high-power laser fiber strong heat dissipation mounting process, which comprises the following steps: S1, preparing a metal heat dissipation plate, machining a fiber mounting groove on the surface of the metal heat dissipation plate, and quickly vacuum cleaning and packaging the metal heat dissipation plate after the machining; S2, preparing a fiber and a filler prepared from metal powder, arranging the fiber in the fiber mounting groove of the metal heat dissipation plate, covering the filler on the fiber, then placing the metal heat dissipation plate on a heat radiation platform of a vacuum brazing furnace, and closing the vacuum brazing furnace; S3, first vacuumizing the vacuum brazing furnace to at least 2.4X10 ‑5 Pa, then heating the heat radiation platform to 240-260 DEG C, and keeping the temperature for 4 hours; and S4, after the internal temperature of the vacuum brazing furnace decreases to 80 DEG C, introducing atmosphere, and taking out the metal heat dissipation plate and the fiber as a whole after the brazing is completed. The process can significantly improve the heat dissipation efficiency of the fiber, and provides a solid technical foundation for large-scale development and application of high-power lasers.

The laser process uses a laser beam for cutting, brazing, welding or other operations on different materials, and the laser uses elements of the system for positioning, such as discrete adjustment of the positioning elements or dynamic movement of the laser head. For systems using high-energy laser, the elements, including elements that facilitate movement, may encounter a thermal problem. An optical head for a high power laser cutting system is disclosed herein. In the disclosed system, the optical head includes a focus lens having a focal length shorter than a desired working distance of the system. Further disclosed is a system using such an optical head, allowing for desired positioning of the focus and magnification of the image of the system. The use of the disclosed laser heads within high power laser systems may allow for reduced thermal loading and contamination to sensitive components.

The invention relates to the technical field of semiconductor lasers, in particular to a high-power laser based on a multi-PN junction Bar strip, and the multi-PN junction Bar strip comprises a Bar strip substrate, a PN junction array, a contact layer and an insulating layer. The PN junction array is composed of PN junction units, and each PN junction unit is formed by superposing epitaxial basic units of a hierarchical structure; the epitaxial basic units are connected through tunneling layers; the contact layer is arranged on the top surface of the PN junction unit; the insulating layers are arranged on the side surfaces of the PN junction units and are used for isolating the adjacent PN junction units; and the Bar substrate is used for carrying the PN junction array, the contact layer and the insulating layer. Through the stacked epitaxial basic units, the series integration of the luminous points in the epitaxial growth direction is realized, and by combining the traditional parallel integration of the transverse luminous points, the spectral distribution is more uniform, the number of Bar chips and the number of heat sinks can be reduced, and the advantages of component cost and production efficiency are achieved.

This invention discloses a manganese-activated organic-inorganic hybrid fluoride red fluorescent ceramic, its preparation method, and its applications. The invention obtains the manganese-activated organic-inorganic hybrid fluoride red fluorescent ceramic by cold pressing and sintering the manganese-activated organic-inorganic hybrid fluoride red phosphor, followed by cooling; or by uniformly mixing a manganese-activated organic-inorganic hybrid fluoride matrix and fluoromanganate, followed by cold pressing and sintering, and then cooling. The manganese-activated organic-inorganic hybrid fluoride red fluorescent ceramic prepared by this invention has high transparency and can be effectively excited by ultraviolet, near-ultraviolet, and blue light, emitting high-purity narrow-band red light at approximately 631 nm. It exhibits high absorption efficiency for blue light and high luminous efficiency, making it suitable for applications in white LEDs and high-power laser devices. The preparation process of the red fluorescent ceramic of this invention is simple, mild, widely applicable, and low-cost.

The invention provides a laser, a preparation method thereof and a laser system, and relates to the technical field of photoelectricity, and the laser comprises an epitaxial structure and a ridge waveguide. Wherein the epitaxial structure comprises an active layer; the ridge waveguide is located on the epitaxial structure and extends in the first direction, and the size of the ridge waveguide in the second direction is smaller than that of the active layer in the second direction; the ridge waveguide comprises a first sub-part and second sub-parts arranged on the two sides of the first sub-part in the second direction, and the part, close to the first sub-part, of each second sub-part comprises a first ion implantation damage structure. According to the scheme, the first ion implantation damage structures are arranged on the second sub-parts on the two sides of the ridge waveguide, the physical difference of light field distribution of a fundamental mode and a high-order mode is utilized, selective absorption of the high-order mode and effective limitation of current diffusion are achieved under the condition that the ridge waveguide is widened, and on the premise that an additional structure is not introduced, the effective absorption of the high-order mode is achieved. And stable output of the fundamental mode of the high-power laser is ensured.

The application discloses a uniform light optical system and a processing head based on multiple fiber output laser modules, which comprises multiple fiber output laser modules, an imaging lens and a light splitting component; the fiber output end faces of the multiple fiber output laser modules are arranged in a plane according to a certain rule; the imaging lens comprises at least one lens and is located on the output light path in the light emitting direction of the fiber output end faces of the laser modules; the light splitting component comprises at least one spatial angle or position light splitting device, and the light splitting devices are independently arranged before the imaging lens, after the imaging lens or between the lenses of the imaging lens; the application directly shapes and uniformly lightens through the optical system by using multiple small-power laser modules, avoids using high-power lasers, thus avoiding the combiner problem in the prior art, reducing the cost and improving the reliability.

The embodiments of the present application relate to the technical field of linear pluggable optical modules. Provided are a linear pluggable optical module, and a method for realizing high stability and low power consumption of a linear pluggable optical module. By means of a Buck-Boost DC-DC conversion module arranged at a power-supply input port of a linear pluggable optical module, the system power supply on a host side and the power supply of the linear pluggable optical module can be isolated from each other, so as to achieve the effect of isolating the power-supply noise on a system side, thereby improving the application stability of the linear pluggable optical module. A DC-DC conversion module is configured to directly provide a current to a high-power laser device, so as to eliminate the headroom of a current-mode digital-to-analog converter, thereby reducing the power consumption of the linear pluggable optical module.