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40 results about "Greenlight laser" patented technology
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Dual-wavelength laser annealing device and method thereof
ActiveCN104392914AUniform energy densityHighlight substantive featuresSemiconductor/solid-state device manufacturingLaser beam welding apparatusGreenlight laserLight spot
The invention relates to a dual-wavelength laser annealing device and a method thereof. The dual-wavelength laser annealing device comprises a green laser device and an infrared laser device; an output optical path of the green laser device is sequentially provided with a beam expanding module, a green light bar-type spot reshaping module, and a green light 45-degree reflector; an output optical path of the infrared laser device is sequentially provided with an infrared bar-type spot reshaping module, and an infrared 45-degree reflector; output optical paths of the green light 45-degree reflector and the infrared 45-degree reflector are provided with a beam combining projection focus lens; an output optical path of the beam combining projection focus lens is provided with a variable diaphragm; and an output end of the variable diaphragm is directly opposite to a machining platform. Two laser beams are combined into one beam via the optical assembly; the combined laser beam is converted from a circular Gaussian distribution into a bar-type Gaussian distribution after being coordinated, adjusted and converted among optical elements; the laser is a bar-type light spot after the beam combination; the introduction of the infrared wavelength provides a deeper annealing depth for the light spot, makes the temperature rise at the moment that the laser contacts with the surface of material, thereby increasing the activation rate of implanted ions; and therefore the machining effect is better.
Owner:SUZHOU DELPHI LASER +1
Group iii nitride-based green-laser diodes and waveguide structures thereof
Group III nitride-based laser diodes comprise an n-side cladding layer formed of n-doped (Al,In)GaN, an n-side waveguide layer formed of n-doped (Al)InGaN, an active region, a p-side waveguide layer formed of p-doped (Al)InGaN, and a p-side cladding layer formed of p-doped (Al,In)GaN. Optical mode is shifted away from high acceptor concentrations in p-type layers through manipulation of indium concentration and thickness of the n-side waveguide layer. Dopant and compositional profiles of the p-side cladding layer and the p-side waveguide layer are tailored to reduce optical loss and increased wall plug efficiency.
Owner:CORNING INC
Switching optical fibre laser on frequency
InactiveCN101202407AMiniaturizationEasy to integrateOptical resonator shape and constructionActive medium materialGratingRare earth
The invention discloses a frequency up-conversion fiber laser, comprising a pumping source 1, a temperature control system 3, a collimation focusing lens group 5, an input coupling lens 7, an output coupling lens 8 and a rare earth mixed fiber 9; wherein, the pumping source 1 outputs stably a pumping laser through the temperature control system 3; the pumping laser is focalized through the collimation lens group 5, permeates the input coupling lens 7 and is coupled into the rare earth mixed fiber 9 to generate a frequency up-conversion laser part which is output through the output coupling lens 8; the input coupling lens 7 and / or the output coupling lens 8 of the frequency up-conversion fiber laser can be replaced by a fiber grating 14. Alternatively, a pumping source 2 and a dichroic beamsplitter 10 can be adopted on the other end surface of the fiber, so as to lead the dichroic beamsplitter 10 to form an angle of 45 DEG with an optical axis. The invention has the advantages of high laser efficiency, a plurality of wavelengths which are output by the laser, and being beneficial for the output of visible light (especially for blue green light) and laser with different wavelengths at the same time and for the miniaturization and integration of devices.
Owner:SOUTH CHINA UNIV OF TECH
Ytterbium-doped crystal as well as growth method and application thereof
InactiveCN106801257AImprove optical qualityEasy to manufacturePolycrystalline material growthBy pulling from meltNonlinear optical crystalGreenlight laser
Owner:SHANDONG UNIV
Intelligent traffic light with high warning property
PendingCN111210642AConsistent luminous effectGood warningControlling traffic signalsGreenlight laserEngineering
The invention discloses an intelligent traffic light with a high warning property. The intelligent traffic light comprises a supporting stand column, a laser projection module and a traffic control system. The LED light source module comprises red light, green light and yellow light and provides a road surface signal command function; the light sources are a red laser light source and a green laser light source; the laser projector projects the light source and emits projection light beams to form a light beam fence on the road surface, a central control panel sets the width and the length ofthe projection light beams according to the detection result of the projection area detection unit, and the optimal warning effect is achieved under the condition that the necessary sight line is notblocked. The light source intensity value of the projection light beams is set according to the detection result of a photosensitive sensor so that the highest warning effect is achieved, and the light source light-emitting effect is kept consistent with the light-emitting effect of the LED light source module; and the data analysis module analyzes the personnel and vehicle flow of the road section according to the detection result of the flow detection module, and the working states of the light source and the LED light source module are adjusted through the timing setting module.
Owner:合肥林夏智能科技有限公司
Ytterbium-doped crystal, as well as growing method and application thereof
InactiveCN105603529AImprove optical qualityEasy to manufacturePolycrystalline material growthBy pulling from meltNonlinear optical crystalGreen laser
The invention relates to ytterbium-doped crystal, as well as a growing method and application thereof. The ytterbium-doped crystal has a molecular formula of Ca(3-3x)Yb3xRGa3Si2O14, wherein R is Nb ion or Ta ion, and the doping concentration of an Yb ion is 0.1-50at.%. The ytterbium-doped crystal has laser emission and non-linear optical effect, and is self-frequency-doubled laser crystal with excellent performance. Compared with a laser combined by laser crystal and non-linear optical crystal, a self-frequency-doubled green laser prepared from the ytterbium-doped crystal has the advantages of smaller size, more compact structure, greatly reduced production cost, simple processing and assembling step and high production efficiency.
Owner:SHANDONG UNIV
High-stability air-cooled green laser
PendingCN114665359ACompact structureEasy to carryLaser cooling arrangementsGreenlight laserBeam splitter
The invention discloses a high-stability air-cooled green laser which comprises a pumping source, a collimating lens group, a rear cavity mirror, a laser crystal, a Q-switched crystal, a polaroid, a frequency doubling crystal, a 0-degree two-point reflector, a 45-degree spectroscope, a window mirror and a beam expanding lens group. Pump light emitted by the pumping source is reflected after passing through the collimation photoscope group, the rear cavity mirror, the laser crystal, the Q-switched crystal, the polaroid, the frequency doubling crystal and the 0-degree double-point reflector, passes through the frequency doubling crystal again, is reflected to the 45-degree spectroscope on the surface of the polaroid, passes through the window mirror and is finally emitted out through the beam expanding photoscope group. Cooling fins are embedded in the surface of the laser shell and are of a fin structure, a fan is installed outside the shell, and the cooling fins dissipate heat in an air cooling mode. The device is simple and compact in structure, convenient to carry, capable of achieving industrial batch production, good in output light beam quality, narrow in pulse width, adjustable in repetition frequency and the like, and can be widely applied to the fields of laser radar, medical treatment, scientific research and the like.
Owner:NANJING UNIV OF POSTS & TELECOMM
Large-color-gamut laser light source system integrated through trapped wave beam combination
PendingCN110673430AMeet the requirements of large color gamut Rec.2020Good value for moneyProjectorsOptical elementsGreenlight laserLight guide
Owner:SHANXI OVISION OPTRONICS CO LTD
Subnanosecond green laser
ActiveCN113629482AHigh repetition rateIncrease powerActive medium shape and constructionGreenlight laserBeam splitter
The invention provides a subnanosecond green laser. The subnanosecond green laser comprises a subnanosecond seed source for emitting seed light, a multi-stage amplification structure for performing multi-stage amplification on the seed light, and a frequency doubling conversion structure for performing frequency doubling conversion on the amplified seed light, the multi-stage amplification structure comprises a first-stage amplification light path, a second-stage amplification light path and a third-stage amplification light path; the first-stage amplification light path comprises a first seed light path, a first laser crystal, a 0-degree reflecting mirror and a first pumping module which are arranged in sequence; the second-stage amplification light path comprises a second seed light path, a second laser crystal, a 0-degree reflecting mirror and a second pumping module which are arranged in sequence; and the third-stage amplification light path comprises a third seed light path, a third laser crystal, a pumping spectroscope and a third pumping module which are arranged in sequence. According to the subnanosecond green laser provided by the invention, the output green laser has the characteristics of high repetition frequency, high average power and high monopulse energy, and can meet market application requirements.
Owner:安徽光智科技有限公司
White laser light source generation device and method
PendingCN112787206ASimple preparation processImprove conversion efficiencyOptical resonator shape and constructionActive medium shape and constructionGreenlight laserGreen laser
The invention relates to the field of white laser light source manufacturing, and concretely relates to a white laser light source generating device and method. The device comprises: a first pump laser used for generating first pump laser; a second pump laser used for generating second pump laser, wherein the wavelength of the first pumping laser is smaller than that of the second pumping laser; a laser beam combiner used for combining the first pumping laser and the second pumping laser which enter the laser beam combiner from different incident light path directions into pumping laser with the same emergent light path direction, namely combined pumping laser; and a periodically poled crystal which generates purple laser from part of the first pumping laser in the combined pumping laser, generates green laser from the second pumping laser, and generates white laser from the purple laser, the green laser and the remaining first pumping laser in the combined pumping laser. The periodically poled crystal converts two beams of incident pumping laser into purple laser and green laser at the same time, so that the necessary conditions for generating a white laser light source are met.
Owner:青岛鲲腾量子应用技术有限公司 +1
Handcart switch cabinet
ActiveCN110702005AImprove convenienceImprove operational reliabilitySwitchgear with withdrawable carriageUsing optical meansGreenlight laserDisplay device
The invention relates to a handcart switch cabinet. The handcart switch cabinet comprises a body and a detection assembly, wherein the detection assembly comprises a spherical reflector and a green laser; the green laser emits a laser beam parallel to a horizontal axis of the green laser to the spherical reflector; the laser beam is reflected by the spherical reflector to form a reflection beam incident to a moving contact; and a centering condition of the moving contact and a static contact is calculated by an included angle alpha between the reflection beam and the laser beam. The handcart switch cabinet has the advantages that the green laser in the detection assembly emits the laser beam, the laser beam is reflected by the spherical reflector arranged on the static contact to form thereflection beam incident to the moving contact, the centering condition of the moving contact and the static contact is calculated by the included angle alpha between the reflection beam and the laserbeam, the centering condition of the moving contact and the static contact during operation is intuitively displayed on a display by an electronic endoscope camera, the centering condition of the moving contact and the static contact can be clearly observed, and a centering error and an error direction can be clearly observed.
Owner:浙江八达电子仪表有限公司 +2
Infrared spot thermometer
PendingCN107702803AAccurate targetingAccurate judgmentRadiation pyrometryOptical axisData acquisition
The invention discloses an infrared spot thermometer. The infrared spot thermometer comprises an instrument casing, a thermal infrared lens, a thermal infrared detector, a data acquisition and displaycircuit and a green laser, wherein the thermal infrared lens, the thermal infrared detector, the data acquisition and display circuit and the green laser are arranged in the instrument casing. The thermal infrared lens and the green laser are arranged on the front side of the inner cavity of the instrument casing and are arranged in parallel up and down, so that the optical axis of the green laser is parallel to the optical axis of the spot thermometer. The thermal infrared detector directly faces the rear side of the thermal infrared lens. The thermal infrared lens converges the collected heat radiation lines of a target location area onto the thermal infrared detector. The data acquisition and display circuit collects signals sensed by the thermal infrared detector and displays the signals on a liquid crystal display screen. A filter aiming scope is arranged on the upper side of the instrument casing. The filter aiming scope is a cylindrical cavity body. A narrow band filter is arranged on the front end of the cavity body. The optical axis of the filter aiming scope is parallel to the optical axis of the spot thermometer. According to the invention, target positioning of the infrared spot thermometer is accurate.
Owner:SHENGZHOU ELECTRIC POWER +3
Passive Q-switched pulsed self frequency doubling green light laser
InactiveCN109698461ACompact structureIncrease the cavity lengthLaser detailsGreenlight laserHigh peak
The invention relates to a passive Q-switched pulsed self frequency doubling green light laser which comprises a pump source, a self frequency doubling laser crystal, a saturable absorber and a resonant cavity output lens which are orderly arranged along an optical path. The self frequency doubling laser crystal is Nd:YCOB crystal or Nd:GdCOB crystal, the length of a light passing direction is 6 to 15 mm, a cutting direction is a 1064 nm frequency doubling phase matching direction, the doping concentration of strontium ions is 1 to 20 at.%, and the material of the saturable absorber is a two-dimensional material SnSe2. According to a film-like saturable absorber modulated self frequency doubling laser made of the two-dimensional material in the invention, continuous wave self frequency doubling light is converted into pulse self frequency doubling laser with a short pulse width, a high peak power and high repetition frequency. The saturable absorber used in the invention has the advantages of simple preparation process, low production cost, high efficiency and easy assembly, and the produced pulse self frequency doubling laser has the advantages of small volume and good performance, and the large-scale promotion and use are facilitated.
Owner:SHANDONG UNIV
Laser marking device
ActiveCN110948115ASolve the technical problem of poor marking effectMarking effect is stable and reliableFinal product manufactureLaser beam welding apparatusGreenlight laserLight spot
The invention discloses a laser marking device. The laser marking device comprises a cabinet, a feeding and discharging assembly, a marking assembly and a lifting assembly, wherein the feeding and discharging assembly and the lifting assembly are arranged on the cabinet, the marking assembly is arranged on the lifting assembly and positioned above the feeding and discharging assembly, the markingassembly comprises a laser, and the light source of the laser is a green light source. According to the laser marking device, a green-light laser beam is used for focusing on the surface of a productto form fine and high-energy density light spots, each high-energy laser pulse instantaneously breaks molecular bonds on the surface of the processed material to form mark marks, and the pre-designedcharacters, graphics and other contents are permanently marked on the surface of the material, so that the marking effect is stable and reliable, and the permanent mark does not fade. By means of thelaser marking device, the technical problem of poor infrared laser marking effect in the prior art is solved.
Owner:HANS LASER TECH IND GRP CO LTD
Acousto-optic Q-switched sub-nanosecond infrared solid laser and control method thereof
ActiveCN112003122ACompact structureIncrease powerLaser cooling arrangementsNanosecond laser pulseGreenlight laser
The invention relates to an acousto-optic Q-switched sub-nanosecond infrared solid laser, which comprises a laser source and a laser resonant cavity, wherein the laser resonant cavity comprises a resonance light path and an acousto-optic Q switch Q1; and laser output by the laser source passes through the resonance light path and then generates resonance light to be output to the acousto-optic Q switch, and the acousto-optic Q switch generates laser pulses and then outputs the laser pulses. The laser resonant cavity is simple and small in structure, sub-nanosecond laser pulses less than 6ns can be obtained through the short optical resonant cavity and the small light spot size under the condition that only acousto-optic Q-switching is conducted, and excellent seed laser is provided for a sub-nanosecond infrared / green laser with higher power.
Owner:罗根激光科技(武汉)有限公司
Method for generating Bessel-like beams by growing microcones on fiber end faces
ActiveCN109683330BQuality improvementWide working wavelength rangeOptical elementsNonlinear opticsGreenlight laser
The invention belongs to the technical field of beam conversion, in particular to a method for generating Bessel-like beams by growing microcones on the end faces of optical fibers. The invention includes: depositing a photopolymer liquid reagent on the end face of a single-mode fiber, coupling a green laser into the single-mode fiber through a lens, and reacting with the photopolymer liquid reagent deposited on the end face of the single-mode fiber to form a polymer microcone; After passing through the polymer microcone formed on the fiber end face, it transforms into a Bessel-like beam. The shape of the microcones is controlled by photopolymerization parameters such as green laser power, laser exposure time, and oxygen diffusion concentration. The working bandwidth of this microcone covers the entire visible light region and even the near-infrared band, and can have more than 30 concentric rings at most, and the generated Bessel-like beam has self-restoring properties. The method of the invention is efficient, low-cost, and convenient, and can be widely used in the fields of particle manipulation, optical imaging, nonlinear optics, photolithography, micro-manufacturing, and the like.
Owner:FUDAN UNIV
Welding equipment
InactiveCN112518117ARealize automatic welding functionPromote absorptionLaser beam welding apparatusGreenlight laserEngineering
The invention provides welding equipment. The welding equipment comprises a workbench, a welding mechanism and a conveying mechanism. The welding mechanism comprises a portal frame and a green laser.The portal frame is installed on the workbench. The green laser is movably installed on the portal frame. The conveying mechanism is installed on the workbench and comprises a conveying assembly, a fixed carrier and a positioning assembly. The fixed carrier can be used for installing and fixing a to-be-welded piece. The conveying assembly is used for conveying the to-be-welded piece. The fixed carrier is arranged on the conveying assembly and can move along with the conveying assembly. The positioning assembly is used for positioning the fixed carrier on the conveying assembly. The green lasercan weld the to-be-welded piece in the positioned fixed carrier. According to the welding equipment, a function of automatically welding the to-be-welded piece can be fulfilled, so that the welding efficiency of the to-be-welded piece is improved, and the welding quality is ensured.
Owner:SHENZHEN TETELASER TECH CO LTD
Underwater quenching method for thin steel plate
ActiveCN112662864AReduce scatterReduce absorptionFurnace typesHeat treatment furnacesGreenlight laserLaser quenching
The invention discloses an underwater quenching method for a thin steel plate. The method comprises the following steps: polishing, cleaning and decontaminating the surface of a matrix; and standing the pretreated matrix in a water tank, completely immersing the upper surface of the matrix in water, scanning the surface of the matrix by using a blue / green laser with the wavelength range of 400-600nm, and meanwhile, adding a side blowing device to blow away water vapor generated in the laser quenching process in time. According to the method, the laser penetrates through a water layer to irradiate the upper surface of the steel plate, the temperature of the thin steel plate is rapidly increased to increase the surface temperature of the material to be the austenite transformation temperature or above, heat of the machined position of the surface of the thin steel plate is absorbed by the water layer on the upper surface of the thin steel plate, and cooling water absorbs heat to be severely vaporized to take away a large amount of heat, then, the thin steel plate is rapidly cooled, accordingly, the requirement for the hard outside and tough inside of the thin steel plate is met, and the thermal influence on the matrix part is reduced.
Owner:ZHEJIANG UNIV OF TECH
Optical filter laser cutting method
PendingCN113620586AFreely adjust the laser incident angleFreely adjust the incident angleGlass severing apparatusBeam splitterGreenlight laser
The invention relates to the technical field of optical filter cutting, and discloses an optical filter laser cutting method which comprises the following steps: S1, Gaussian light outputted by a green laser is transmitted to a zoom beam expander through a plurality of reflectors; s2, the laser passing through the zoom beam expander is transmitted to a 1 / 2 crystal wavelength plate through a reflector, so that the laser is changed into linear polarized light with an adjustable polarization direction; s3, the linear polarized light is divided into S polarized light and P polarized light after passing through a polarized light cube spectroscope; s4, the P polarized light is transmitted to a combined lens to form an annular light beam of which the energy density is gradually reduced from inside to outside; and S5, the annular light beam is transmitted to a focusing mirror through a reflecting mirror, the annular light beam is focused in the material, the focusing mirror is driven to move through a servo control system, and the material is cut. The laser is transmitted to a to-be-processed optical filter material after passing through a plurality of groups of reflectors and the combined lens, and the cutting damage influence is reduced to be within 5 microns by controlling the laser power and the light spot shape.
Owner:苏州捷兴激光设备有限公司
Medical three-wavelength yellow and green laser
InactiveCN103457143AImprove stabilityImprove performanceOptical resonator shape and constructionGreenlight laserEngineering
The invention discloses a medical three-wavelength yellow and green laser. The medical three-wavelength yellow and green laser comprises a pump light generation unit, a light beam shaping unit, a gain medium unit, an etalon unit, a nonlinear crystal unit and an optical resonant cavity unit, wherein the pump light generation unit, the light beam shaping unit, the gain medium unit, the etalon unit and the nonlinear crystal unit are sequentially arranged on a light path, and the gain medium unit, the etalon unit and the nonlinear crystal unit are all arranged in the optical resonant cavity unit. The medical three-wavelength yellow and green laser utilizes the gain medium unit to achieve stable two-wavelength infrared laser operation, and then achieves output of three-wavelength yellow and green laser through an intracavity frequency doubling method and an intracavity sum-frequency method. Therefore, the medical three-wavelength yellow and green laser can effectively generate the three-wavelength yellow and green laser with high efficiency, a low threshold value and high stability, and largely improves the integrated performance.
Owner:SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
Carbon fiber resin-based composite material green light ultrafast laser machining system and method
InactiveCN111618443AHigh precisionImprove efficiencyLaser beam welding apparatusCarbon fibersBeam splitter
The invention provides a carbon fiber resin-based composite material green light ultrafast laser machining system and method, and the high-quality, high-precision and efficient machining requirement of aerospace component carbon fiber enhanced resin-based composite materials can be really met. The provided green light ultrafast laser machining system comprises a green light laser device, a beam expanding lens, a first space light modulator, a first reflector, a first lens, a first beam splitter, a first monitoring part, a second space light modulator, a second reflector, a dual-lens set, a second beam splitter, a second monitoring part, a second lens and a control part. The provided green light ultrafast laser machining method is characterized in that the above green light ultrafast lasermachining system is adopted for adjusting green light gauss lasers into 20 or more of flat top annular beams at a certain interval for machining the carbon fiber resin-based composite materials.
Owner:HUBEI UNIV OF TECH
A kind of underwater quenching method of thin steel plate
ActiveCN112662864BReduce scatterReduce absorptionFurnace typesHeat treatment furnacesGreenlight laserLaser quenching
Owner:ZHEJIANG UNIV OF TECH
Low-cost green light phase range finder
PendingCN114137559AEfficient and accurate rangingReduce manufacturing costElectromagnetic wave reradiationGreenlight laserRed laser
A low-cost green light phase range finder disclosed by the present invention comprises a light machine body, a green light laser diode and a red light laser diode are arranged in the light machine body, an internal reflection surface is arranged on the inner wall of the light machine body, and the internal reflection surface reflects the red light laser diode to a photosensitive device. The open end of the ray machine body is provided with a receiving lens. According to the range finder, the structural design of the green laser diode, the red laser diode and the photosensitive device is adopted, so that the manufacturing cost of the range finder is reduced while efficient and accurate range finding of the range finder is ensured, errors caused by temperature changes can be eliminated, the temperature drift phenomenon is prevented, and the range finder is suitable for large-scale popularization and application. The measurement error is reduced, and the measurement precision is improved.
Owner:杭州隆硕科技有限公司
All-solid-state blue-green laser based on thulium-doped ion crystal
PendingCN114204396ARich varietyMid-infrared emission at various wavelengthsActive medium materialGreenlight laserPlane mirror
The invention discloses an all-solid-state blue-green laser based on a thulium-doped ion crystal. The all-solid-state blue-green laser comprises an excitation source, a gain medium, a nonlinear frequency doubling crystal, an endoscope system and a tuning element, the plane mirror, the gain medium, the tuning element and the plane-concave cavity mirror are sequentially arranged along the laser output direction of the excitation source; a nonlinear frequency doubling crystal and a plano-concave rear cavity mirror are sequentially arranged in the direction of a reflection light path of the plano-concave cavity mirror, wherein a certain angle is formed between the plano-concave rear cavity mirror and the front light path; and the plane mirror, the plano-concave cavity mirror and the plano-concave rear cavity mirror jointly form a folded resonant cavity. Pump light emitted by the excitation source is injected into the gain medium after being collimated and focused, and output mid-infrared laser with the wavelength of 1.85-2.1 microns is converted by the nonlinear frequency doubling crystal to output blue-green laser with the wave band of 462.5-525nm. The laser has the advantages of abundant emission wavelength, tunable laser wavelength, high output power, high stability, simple structure, small size and the like.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Self-sweep-frequency single-frequency green laser
PendingCN114865435AImprove stabilityEasy to operate and analyzeActive medium materialActive medium shape and constructionGratingGreenlight laser
A self-sweep-frequency single-frequency green laser comprises a seed source module and a frequency doubling module. The seed source module is an annular cavity, the annular cavity comprises a first doped optical fiber, a second doped optical fiber and a reflection end, the first doped optical fiber serves as a gain medium to generate exciting light, the exciting light is reflected by the reflection end through the second doped optical fiber and then returns to the annular cavity along the second doped optical fiber, and the second doped optical fiber serves as a saturable absorber. The excitation light forms a standing wave structure in the doped optical fiber II and forms a dynamic grating to compress the excitation light ray width and realize self-sweep-frequency single-frequency laser output, the annular cavity outputs self-sweep-frequency single-frequency laser, the wave band of the self-sweep-frequency single-frequency laser is 2 lambda, and lambda is the output green light wave band; the frequency doubling module takes the self-sweep-frequency single-frequency laser as fundamental frequency light, and green light output is realized through frequency doubling. The method has the advantages of good stability, simplicity and convenience in operation and analysis and the like. Sweep frequency output of green light can be achieved, meanwhile, output laser has high monochromaticity, the light path is simple, the size is small, and the manufacturing cost is low.
Owner:XIDIAN UNIV
Laser processing equipment and system
PendingCN113732517AHighly integratedImprove practicalityLaser beam welding apparatusGreenlight laserLaser processing
The invention belongs to the technical field of laser processing equipment, and particularly relates to laser processing equipment and system. In the laser processing equipment, a marking assembly comprises a marking platform, an infrared marking head and a green light marking head; an optical splitter is used for emitting infrared laser beams in laser beams emitted by a laser through the infrared marking head and emitting green laser beams in laser beams emitted by the laser through the green marking head; a drilling assembly comprises a drilling platform and a rotary cutting head; the optical splitter is used for emitting the laser beams emitted by the laser through the rotary cutting head; a cutting assembly comprises a cutting platform and a cutting head; and the optical splitter is used for emitting the laser beams emitted by the laser from the cutting head. According to the laser processing equipment, the integration level is high, the practicability and universality of the laser processing equipment are improved, and the manufacturing cost of the laser processing equipment is reduced.
Owner:HANS LASER TECH IND GRP CO LTD
Gallium nitride-based green laser and preparation method thereof
ActiveCN113036600AReduce optical absorption lossImprove quantum efficiencyOptical wave guidanceLaser detailsGreenlight laserSingle crystal
The invention discloses a gallium nitride-based green laser and a preparation method thereof. The gallium nitride-based green laser comprises a gallium nitride single crystal substrate, an n-GaN layer, an n-AlGaN / GaN superlattice limiting layer, a lower waveguide layer, an active region, a p-type electron blocking layer, an upper waveguide layer, a p-AlGaN / GaN superlattice limiting layer and a p-GaN contact layer which are sequentially stacked from bottom to top, wherein the active region is of a quantum well structure with variable temperature and variable growth rate, and the lower waveguide layer and the upper waveguide layer are gradient doped composite waveguide layers. According to the invention, the InGaN / InGaN quantum well structure with variable temperature and variable growth rate serving as an active region, the gradient doped u-InGaN+u-GaN+p<+>-AlGaN composite upper waveguide layer and the gradient doped n<+>-Aly1Ga<1-y1>N+n-GaN+u-GaN+u-Inx5Ga<1-x5>N composite lower waveguide layer are arranged, so that the optical absorption loss of the P-type layer of the laser is effectively reduced, the quantum efficiency of the laser is improved, and the green light emitting intensity of the gallium nitride-based green light laser is further improved.
Owner:DONGGUAN UNIV OF TECH
Semiconductor structure and manufacturing method thereof
ActiveCN104517838BClear P-N junctionSemiconductor/solid-state device manufacturingSemiconductor devicesDopantSemiconductor structure
The invention discloses a semiconductor structure and a manufacturing method thereof. The method of fabricating a semiconductor structure includes the following steps. An N-type drift layer is formed. An N-type buffer layer is formed on the N-type drift layer, and the N-type buffer layer includes an N-type dopant. A P-type heavily doped layer (P+implantation layer) is formed on the N-type buffer layer, and the P-type heavily doped layer includes a P-type dopant. A laser light source is used to irradiate the N-type buffer layer and the P-type heavily doped layer to activate the N-type dopant and the P-type dopant. Among them, the laser light source includes an infrared light (IR) and a green laser (green laser). The infrared light irradiates the N-type buffer at a scanning speed of greater than 300 mm / s to 600 mm / s. layer and the P-type heavily doped layer, the infrared light includes multiple infrared light pulses, and the pulse time of the infrared light pulse is greater than 30 nanoseconds (ns) to 200 nanoseconds.
Owner:IND TECH RES INST
Power transmission line tower surface defect detection method and device based on green laser imaging
PendingCN114264660AAccurately obtain minute detailsRealize non-destructive testingPicture taking arrangementsOptically investigating flaws/contaminationGreenlight laserLight beam
The invention provides a power transmission line tower surface defect detection method based on green laser imaging. The method comprises the following steps: dividing a detected tower into a plurality of sub-regions; sequentially collecting oblique photography data of each sub-region of the detected tower under the irradiation of the green laser beams; performing image fusion and splicing on the oblique photography data based on a contour line extraction algorithm of region growth; and judging whether the detected tower has defects or not according to the fused and spliced image. According to the transmission line tower surface defect detection method provided by the invention, tiny detail information of the detected tower can be accurately obtained, and nondestructive detection of the tower is realized.
Owner:STATE GRID HEILONGJIANG ELECTRIC POWER CO LTD ELECTRIC POWER RES INST +1
Device for cutting materials through ultrahigh-frequency fiber laser and working method of device
InactiveCN111906455ALow costFast cutting speedLaser detailsLaser beam welding apparatusGreenlight laserNanosecond
The invention relates to a device for cutting materials through an ultrahigh-frequency fiber laser and a working method of the device. The device comprises the ultrahigh-frequency fiber laser, a beamexpander, a reflector and a galvanometer which are connected in sequence, an optical fiber conveying device is arranged in the ultrahigh-frequency fiber laser, and the galvanometer is connected with avisual positioning system, wherein the monopulse energy of the ultrahigh-frequency fiber laser is larger than 1 micro-joule. According to the device for cutting materials through the ultrahigh-frequency fiber laser and the working method of the device. The ultrahigh-frequency and low-pulse-width fiber laser is adopted and matched with automatic mechanisms such as a rolling platform to cut materials, compared with a nanosecond infrared laser and a green laser, the ultrahigh-frequency and low-pulse-width fiber laser has the beneficial effects of being high in cutting speed, small in heat influence, low in cost and simple and flexible in equipment, and the cutting speed and the cutting quality are greatly improved.
Owner:INNO LASER TECH CORP LTD
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