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35results about How to "Improve electro-optic efficiency" patented technology
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Integrated LED (Light Emitting Diode) light emitting device and manufacturing method thereof
ActiveCN103311261ACooling effect plusImprove cooling effectSolid-state devicesSemiconductor/solid-state device manufacturingEngineeringSoldering
The invention discloses an integrated LED (Light Emitting Diode) light emitting device and a manufacturing method thereof. The integrated LED light emitting device comprises at least two mutually-separated LED light-emitting epitaxial units and electrode soldering pan layers, wherein each LED light-emitting epitaxial unit contains an upper surface and a lower surface, the upper surfaces serve as light emitting surfaces, and the electrode soldering pan layers are formed on the lower surfaces of the LED light-emitting epitaxial units, have enough thickness to support the LED light-emitting epitaxial units and are used for connecting all the LED light-emitting epitaxial units so as to form a connected circuit of a plane without height drop; and the electrode soldering pan layers are divided into P and N electrode regions. A series, parallel or series-parallel circuit is formed by all the LED light-emitting epitaxial units. The integrated LED light emitting device and the manufacturing method of the integrated LED light emitting device have the advantage that the problems of package welding, electrode shading, poor connection stability and the like can be solved effectively.
Owner:ANHUI SANAN OPTOELECTRONICS CO LTD
Projection display device
InactiveCN101086608AVariety of colorsColorfulProjectorsPicture reproducers using projection devicesProjection lensOptical efficiency
The LED or LD projection display comprises LED or LD light, projection lens system, signal modulator, with the light being at least one of them formed matrix light, or coupling them optically into the optical fiber matrix, with the signal modulator used for loading signal, light output path installed with projected lens system. It can realize large screen display with high electric optical efficiency, long in durability, simple in system and bright in color.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
Quantum dot light emitting device and display device
InactiveCN108155296AImprove electro-optic efficiencySolid-state devicesSemiconductor/solid-state device manufacturingElectron holeDisplay device
The invention relates to a quantum dot light emitting device. The device comprises an anode layer, a hole transport layer, a quantum dot light emitting layer, an electron transport layer and a cathodelayer which are stacked in sequence; the quantum dot light emitting layer comprises quantum dots of a core-shell structure and barrier material particles dispersed in a gap between every two adjacentquantum dots, and the materials of the barrier material particles are the same as the materials of shells of the quantum dots. By dispersing the barrier material particles in the gaps of adjacent quantum dots, the electro-optical efficiency of the quantum dot light emitting device is effectively improved.
Owner:SUZHOU XINGSHUO NANOTECH CO LTD
2.5-dimensional photon crystal-face transmitting laser
InactiveCN1897375ASmall sizeImprove electro-optic efficiencyLaser detailsLaser optical resonator constructionPhotonic crystal structureCrystal structure
A 2.5 Uygur photonic crystal surface emanant laser, including: the wafer; the first DBR layer that is made on the wafer; the below envelope that is made on the first DBR layer; the active layer that is made on the below envelope, and forms the photonic crystal structure on it by the eroding technics; the top envelope that is made on the active layer; the p+ envelope that is made on the top envelope; the second DBR layer that is made on the p+ envelope; the top electrode with the hole that is made on the second DBR layer; the below electrode that is made on the bottom surface of the wafer and covers it.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Non-blind area high-range resolution laser radar wind measurement system and method
ActiveCN109541636AImprove electro-optic efficiencyEasy to operateElectromagnetic wave reradiationICT adaptationPeak valueAcousto-optics
The invention provides a non-blind area high-range resolution laser radar wind measurement system. A laser is connected to an electro-optical phase modulator and an acousto-optic frequency shifter through a first coupler; the electro-optic phase modulator, the fiber amplifier, the circulator and the telescope are sequentially connected. The telescope is connected to a second coupler through a circulator; the acousto-optic frequency shifter, the second coupler, a balance detector, an amplifier, a dual-channel AD collection card and a computer are sequentially connected; a sinusoidal signal generator is connected to the acousto-optic frequency shifter; an arbitrary waveform generator is connected to the dual-channel AD collection card and an electro-optical phase modulator; and an external trigger is connected to the arbitrary waveform generator and a dual-channel AD collection card. The invention also provides a non-blind area high-range resolution laser radar wind measurement method. Through combination of the pseudo-random code phase modulation technology and the heterodyne detection technology, the system works under the wide pulse width and the low peak power to obtain the profile wind speed information at the non-blind area with a high-range resolution through adoption of the algorithm of removing an end face signal influence.
Owner:DONGHUA UNIV
Small constant-temperature air-cooling repetition-rate DPL (Diode Pump Laser) without TEC (ThermoElectric Cooler)
InactiveCN105024266AImprove electro-optic efficiencyImprove drive stabilityLaser detailsHeat sinkResonator
The invention provides a small constant-temperature air-cooling repetition-rate DPL (Diode Pump Laser) without a TEC (ThermoElectric Cooler) and aims at providing the DPL laser, which has stable pulse repetition rate, large laser energy output and high reliability and is capable of reliably working under the high or low temperature environment of -40 DEG C to +65 DEG C and a certain impact vibration environment. The DPL laser is implemented through the technical scheme as follows: an output mirror and a holophote are arranged on one titanium alloy metal frame structure surface, and are located on one face of a 180-degree fold resonator and the other end of a titanium alloy frame body, and a tetrahedral prism with three mutually vertical surfaces is taken as a 180-degree light path folded mirror; a diode laser array pumping source is quickly heated in an area from the low temperature to the normal temperature, namely -40 DEG C to +39 DEG C, by a ceramic heating element under an air-cooling fin; when the diode laser array pumping source is heated to a normal working temperature range, a temperature sensor carries out motion control on the ceramic heating element to stop heating; when the temperature of the diode laser array pumping source is higher than +70 DEG C, the diode laser array pumping source is quickly cooled by a high-speed cooling fan under a heat sink of the diode laser array pumping source.
Owner:SOUTH WEST INST OF TECHN PHYSICS
High precision speed-measuring distance-measuring radar system and method
ActiveCN101236253BImprove electro-optic efficiencyReduce power consumptionElectromagnetic wave reradiationRadar systemsLocal oscillator
The invention relates to a high precision speed and distance measuring laser radar system and a speed and distance measuring method. The basic principle of the invention is as follows: linear chirp modulation and pseudo-random code modulation of lasers are performed; most lasers after modulation are taken as outgoing lasers and transmitted by a telescope; a small part of the lasers is taken as local oscillator beams and used for coherent detection; laser echo signals are divided into two parts; distance information is obtained after related operation of one part of the laser echo signals and original pseudo-random codes; the frequency difference of the local oscillator beams and echo signal beams is obtained after coherent detection of the other part of the laser echo signals and the local oscillator beams and pulse compression, and simultaneously comprises the distance information and Doppler shift; the Doppler shift is obtained through mathematical manipulation, thereby speed information is obtained. The high precision speed and distance measuring laser radar system and a speed and distance measuring method of the invention is characterized in that the speed information and the distance information of a target can be obtained with high precision.
Owner:HANGZHOU ZHONGKE TIANWEI TECH
High-power 885 nm laser diode side pump Nd:YAG laser module
InactiveCN104466644AReduce thermo-optic effectReduce heat loadActive medium materialNd:YAG laserSemiconductor
A high-power 885 nm laser diode side pump Nd:YAG laser module comprises a glass tube (1), an Nd:YAG laser rod (2), a laser diode linear array (3) and a reflecting mirror (4), wherein the Nd:YAG laser rod (2) is installed in the glass tube; the laser diode linear array (3) is used for the Nd:YAG laser rod (2) and arranged along the circumference of the glass tube in an equally divided mode. A laser module body (9) is encapsulated by fixing plates (5) at the two sides, a module shell (6) at the upper portion and a module base plate (7) at the bottom. According to the laser module, the 885 nm semiconductor laser diode linear array pumping Nd:YAG crystal rod is adopted, compared with an 808 nm pumping laser module, the thermal load is effectively reduced nearly by 30%, and therefore the thermo-optic effect of the laser module is effectively reduced; pumping light is effectively absorbed in a double-passage mode, and the dosage concentration of the Nd:YAG laser rod is increased, so that laser output of high power and high electro-optic efficiency is achieved.
Owner:JIANGSU ZHONGKESIXIANG LASER TECH
Ultraviolet solid-state laser with wavelength of 193 nm
The invention discloses an ultraviolet solid-state laser with a wavelength of 193 nm. The ultraviolet solid-state laser comprises a solid-state laser with a wavelength of 5793 nm, a first lens, a second lens, a frequency doubling crystal, a focusing lens, a sum frequency crystal, a collimating lens and an ultraviolet coated optical filter are arranged in sequence along the laser beam direction of the solid-state laser with the wavelength of 579 nm. Compared with a traditional aerial discharge ArF excimer laser with a wavelength of 193 nm, the ultraviolet solid-state laser with the wavelength of 193 nm has the advantages of being compact in structure, low in cost, convenient to maintain and stable in performance and the like, and can provide a high-quality ultraviolet source for a photoetching system.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Resonance reinforcement transverse optically pumped device and method of metastable gas laser
InactiveCN106129792AIncrease the voltage step sizeVoltage step reductionLaser detailsResonanceOptical pumping
The invention discloses a resonance reinforcement transverse optically pumped device and method of a metastable gas laser. By resonance reinforcement technology, pumping light absorption can be expanded, so that the optical-to-optical efficiency and the electrical-to-optical efficiency of the whole system are improved. By separating pumping laser from emergent laser, the defects of laser extraction power reduction and corresponding insertion loss brought by a polarized device can be overcome, a dichroic mirror is prevented from being used, and the power of a single pumped laser module and the requirement of optical beam quality are reduced. The pumping scheme also can be expanded to a multi-path transverse pumping intrinsic excitation and seed injected master oscillator power amplifier (MOPA) structure, and the optically pumped metastable gas laser is favorably promoted, higher laser output and the application of resonance reinforcement transverse optically pumped device in the field of laser induced plasma are achieved. Moreover, the resonance reinforcement transverse optically pumped method is also suitably used for other optically pumped gas lasers such as an optically pumped oxygen-iodine laser.
Owner:HUAZHONG UNIV OF SCI & TECH
Wavelength-locked high-efficiency semiconductor laser and preparation method thereof
InactiveCN112787217AImprove electro-optic efficiencyInhibit expansionOptical wave guidanceLaser detailsGratingRefractive index
The invention discloses a wavelength-locked high-efficiency semiconductor laser, and belongs to the technical field of semiconductor laser devices. The laser comprises an N-type lower limiting layer, an N-type lower waveguide layer, a quantum well active layer, a P-type upper waveguide layer, an insertion layer, a P-type upper limiting layer and a P-type contact layer from an N-type substrate layer to the top in sequence, the refractive index of the insertion layer is the same as that of the P-type waveguide layer, the conduction type of the insertion layer is N-type, a current limiting layer is formed in the slow axis direction, meanwhile, a grating is formed in the resonance direction, current injection and the grating are formed by etching the insertion layer, and then the P-type upper limiting layer and the P-type contact layer are grown through a secondary epitaxial process. A high-reflection film is evaporated on the rear cavity surface of the laser, and an anti-reflection film is evaporated on the front cavity surface of the laser. The grating is integrated on a laser sheet, meanwhile, good lateral current limitation is formed, the grating and the current limiting layer adopt the same process, the preparation process is simplified, and the laser has the advantages of wavelength locking and high electro-optical efficiency.
Owner:INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
Cascade pumping optical fiber laser based on double-ended output oscillators
PendingCN110829163AImprove utilization efficiencyImprove electro-optic efficiencyExcitation process/apparatusActive medium shape and constructionResonant cavityEngineering
The invention discloses a cascade pumping optical fiber laser based on double-ended output oscillators. The cascade pumping optical fiber laser comprises a laser resonant cavity, a forward pumping signal beam combiner, a backward pumping signal beam combiner, a cladding light filter, an optical fiber end cap and at least two double-ended output laser oscillators. The forward pumping signal beam combiner comprises a first signal input arm, a first pumping signal output arm and a plurality of first pumping injection arms. The backward pumping signal beam combiner comprises a second signal inputarm, a second pumping signal output arm and a plurality of second pumping injection arms. A forward output optical fiber of each double-ended output laser oscillator is connected with the corresponding first pumping injection arm, and a backward output optical fiber of each double-ended output laser oscillator is connected with the corresponding second pumping injection arm. The first signal inputarm is welded to an energy transmission optical fiber. The first pumping signal output arm is connected with one end of the laser resonant cavity, and the other end of the laser resonant cavity is connected with the second signal input arm. According to the invention, the utilization efficiency of pump light and the overall electro-optical efficiency of the laser are improved.
Owner:NAT UNIV OF DEFENSE TECH
Passive Q-switched Nd:YAG intra-cavity 1570nm OPO laser
InactiveCN107946894ACompact structureImprove efficiencyLaser detailsNon-linear opticsResonant cavityResonance
The invention discloses a passive Q-switched Nd:YAG intra-cavity 1570nm OPO laser whose two ends output Cr4+. A pulse xenon lamp and an Nd:YAG crystal are positioned in a diffuse-reflection gatheringcavity; a planar resonant cavity comprises a 1.064-micron outgoing mirror and a 1.064-micron totally-reflecting and 1.57-micron outgoing mirror; the Nd:YAG crystal, a Cr4+:YAG Q-switched crystal, a Polaroid, a KTP crystal are arranged coaxially along the direction of an optical path; the 1.064-micron outgoing mirror is positioned outside the Nd:YAG crystal; the 1.064-micron totally-reflecting and1.57-micron outgoing mirror is positioned outside the KTP crystal;af after absorbing energy radiated by a pump source of the pulse xenon lamp, the Nd:YAG crystal generates excited radiation transitionin the wavelength of 1.064 micron; and transition photons form resonance in a laser resonant cavity composed of the 1.064-micron outgoing mirror and the 1.064-micron totally-reflecting and 1.57-micron outgoing mirror, generate 1.064 micron laser giant pulse output after being Q-switched by Cr4+:YAG, and serve as a pump light source generating a light parameter oscillation effect of a nonlinear crystal KTP.
Owner:SOUTH WEST INST OF TECHN PHYSICS
Method for manufacturing an organic light-emitting display panel
ActiveCN105810852BSmall driving currentImprove electro-optic efficiencyStatic indicating devicesSolid-state devicesElectron holeDisplay device
An embodiment of the present invention provides a method for manufacturing an organic light-emitting display panel, which is used to improve the electro-optical efficiency of a display device. The method includes: forming a first anode and a second anode on a substrate, sequentially forming a first hole transport layer, a first organic light-emitting layer, a first electron transport layer, a An insulating layer and a first cathode in a certain width area on the side of the organic light-emitting layer; a second hole transport layer, a second organic light-emitting layer, and a second electron transport layer are sequentially formed on the second anode, and are located on the periphery of the second anode The insulating layer, the second cathode; the second cathode is partly connected to the first anode.
Owner:BOE TECH GRP CO LTD
Light-gathering cavity of lamp pump laser and lamp pump laser
InactiveCN114122885AReduce energy storage consumptionHigh energy storageOptical resonator shape and constructionActive medium materialErbium lasersRay
The invention relates to a light gathering cavity of a lamp pump laser and the lamp pump laser, and belongs to the technical field of lasers, the light gathering cavity comprises a ceramic cavity body, a cavity is formed in the ceramic cavity body, a xenon lamp and a laser crystal are arranged in the cavity, and a samarium-doped glass tube covers the laser crystal; the inner wall of the cavity of the ceramic cavity body is coated with a samarium-doped glaze layer; the xenon lamp irradiates the laser crystal to excite the laser crystal to emit light with the wavelength of 1064nm, and the light with the wavelength of 1064nm penetrates through the samarium-doped glass tube and is reflected in the cavity for multiple times through the samarium-doped glaze layer; wherein when the light rays with the wavelength of 1064nm penetrate through the samarium-doped glass tube every time, part of the light rays with the wavelength of 1064nm are absorbed by the samarium-doped glass tube; and when the light with the wavelength of 1064nm passes through the samarium-doped glaze layer to be reflected every time, part of the light with the wavelength of 1064nm is absorbed by the samarium-doped glaze layer. The effect of improving the electro-optical efficiency of the ceramic cavity is achieved.
Owner:北京卓镭激光技术有限公司
Secondary refrigerant and preparation method thereof, cooling structure, semiconductor laser bar and heat sink system
PendingCN113717697AWide liquid temperature rangeEffectively regulate working temperatureLaser detailsHeat-exchange elementsHeat sinkFluoride
The invention discloses a secondary refrigerant and a preparation method thereof, a cooling structure, a semiconductor laser bar and a heat sink system. The secondary refrigerant for operating the semiconductor laser bar at low temperature comprises the following components in parts by volume: 100 parts of fluoride; and 1-50 parts of alcohol. The secondary refrigerant has the characteristics of no corrosion, low toxicity, safety, stability, excellent thermal conductivity, wide liquid temperature range and the like, is suitable for a semiconductor laser bar micro-channel heat sink cooling structure running at low temperature, effectively adjusts the working temperature of a semiconductor laser bar, and improves the electro-optical efficiency of the semiconductor laser bar. According to the secondary refrigerant, the freezing point of impurity water in the secondary refrigerant can be reduced to be lower than the working temperature, and ice particles are prevented from being generated to block a heat sink microchannel. The secondary refrigerant has certain conductivity, can prevent accumulation of static charges in the working process, and avoids the problem of static sparking.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Speed and distance measurement system and method based on pseudo-random code phase modulation and heterodyne detection
InactiveCN105629258BImprove electro-optic efficiencyEasy to operateElectromagnetic wave reradiationLocal oscillator signalAcousto-optics
Owner:DONGHUA UNIV
A Hybrid High Power Single Frequency Laser
ActiveCN112636184BReduce usageHigh beam qualityLaser detailsSemiconductor amplifier structurePolarization-maintaining optical fiberEngineering
The invention relates to a hybrid high-power single-frequency laser, comprising an optical fiber seed source unit, a semiconductor optical amplification unit, and a 780nm single-mode polarization-maintaining optical fiber; the optical fiber seed source unit and the semiconductor optical amplification unit are connected through a 780nm single-mode polarization-maintaining optical fiber ; The hybrid single-frequency laser outputs high-power linearly polarized single-frequency laser through a 780nm single-mode polarization-maintaining fiber. The invention combines the advantages of high-power single-frequency fiber lasers and single-frequency semiconductor lasers, simplifies the optical path structure, reduces the number of active optical devices, and reduces system power consumption and system complexity without affecting the single-frequency performance of the laser. It can better meet the needs of engineering applications.
Owner:HUAZHONG PHOTOELECTRIC TECH INST (CHINA SHIPBUILDING IND CORP THE NO 717 INST)
A Diode Pumped Gas Laser System Based on Electromagnetic Driving Mode
ActiveCN113783084BHigh specific powerLow working fluid consumptionLaser detailsEngineeringLaser light
Owner:NAT UNIV OF DEFENSE TECH
Hydrophilic treatment method of ITO (indium tin oxide) substrate
InactiveCN108899269APromote absorptionImprove transmission efficiencySolid-state devicesSemiconductor/solid-state device manufacturingLiquid-crystal displayIndium tin oxide
The invention relates to the technical field of liquid crystal display, in particular to a hydrophilic treatment method of an ITO (indium tin oxide) substrate. The hydrophilic treatment method comprises the step of treating the ITO substrate by a mixed solution of concentrated acid and hydrogen peroxide. By testing the optical and electrical properties of a thin film prepared by the ITO substratesubjected to hydrophilic treatment, the result shows that the carrier transmission efficiency is improved; further, the electrical optical efficiency of an OLED (organic light emitting diode) device is improved; the resistance rate of the thin film is low; the heating is low; the stability of the OLED device is greatly improved; the service life of the OLED device is greatly prolonged; the absorption spectrum and the emission spectrum of the thin film are enhanced; the luminous efficiency is improved.
Owner:CHONGQING BOE DISPLAY LIGHTING CO LTD +1
2.5-dimensional photon crystal-face transmitting laser
InactiveCN100349340CSmall sizeImprove electro-optic efficiencyLaser detailsLaser optical resonator constructionPhotonic crystal structureCrystal structure
A 2.5 Uygur photonic crystal surface emanant laser, including: the wafer; the first DBR layer that is made on the wafer; the below envelope that is made on the first DBR layer; the active layer that is made on the below envelope, and forms the photonic crystal structure on it by the eroding technics; the top envelope that is made on the active layer; the p+ envelope that is made on the top envelope; the second DBR layer that is made on the p+ envelope; the top electrode with the hole that is made on the second DBR layer; the below electrode that is made on the bottom surface of the wafer and covers it.
Owner:INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
Integrated LED light-emitting device and manufacturing method thereof
ActiveCN103311261BCooling effect plusImprove cooling effectSolid-state devicesSemiconductor/solid-state device manufacturingHemt circuitsLight emitting device
The invention discloses an integrated LED light-emitting device and its manufacture. Its integrated LED light-emitting device includes: at least two LED light-emitting epitaxial units separated from each other, including upper and lower surfaces, the upper surface of which is a light-emitting surface; an electrode pad layer, formed on the lower surface of the LED light-emitting epitaxial unit, has The thickness is sufficient to support the LED epitaxial unit and connect the various LED light-emitting epitaxial units to form a plane connection circuit without height difference; the electrode pad layer is divided into P and N electrode areas. The LED light-emitting epitaxial units form a series, parallel or series-parallel circuit. The invention can effectively improve the problems of package welding, electrode shading, poor connection stability and the like.
Owner:ANHUI SANAN OPTOELECTRONICS CO LTD
Patterned substrate and electro-optical semiconductor element
InactiveUS20140159060A1Improve efficiencySmooth connectionSolid-state devicesRecord information storageEngineeringPatterned substrate
A patterned substrate includes a substrate body and a plurality of solid patterns. The solid patterns are set on the substrate body, and at least partial pitches between the solid patterns are different.
Owner:LUCEMITEK
Three-dimensional circular light system
The invention relates to an optic fiber system, in particular to a three-dimensional circular light system. Laser point light of the three-dimensional circular light system is split by an optical fiber system and then reformed to suitable divergent degrees, and beams then pass through a reflecting cone to form 360-degree circular light. The optical fiber splitting system can be divided into multiple beams, so that three-dimensional circular light spots may be implemented from a single laser source. This three-dimensional circular light system comprises a laser, a lens set and the cone, and the light of the laser reaches the laser set through a light path and then reaches the cone, forming the circular light.
Owner:QINGDAO LASENCE
A high power polarized laser device
ActiveCN113314935BRaise the power limitRaise the output power limitOptical resonator shape and constructionActive medium materialEngineeringLaser light
The invention provides a high-power polarized laser device, which comprises a high reflection mirror (2), a laser gain module (1), a polarizer (3) placed in sequence, and placed on the optical path of the s-polarized laser light reflected by the polarizer (3). The s light output mirror (4) and the p light output mirror (5) placed on the optical path of the polarizer (3) transmitted light p-polarized laser light, the s light output mirror (4) makes the s-polarized laser light reflect vertically Returning according to the original optical path forms resonance with the high reflection mirror (2), and the p-light output mirror (5) makes the vertical reflection of the p-polarized laser light return according to the original optical path to form resonance with the high reflection mirror (2). The device uses Tm:YAG crystal as the laser gain medium, and realizes high-power polarized laser output by precisely matching the gain and loss relationship between p-polarized laser and s-polarized laser. It is an efficient, compact and highly reliable 2μm band polarized laser. new technology approach.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
Semiconductor laser pumped alkali metal laser system with V-type pump structure
InactiveCN108988108AStable outputImprove electro-optic efficiencyActive medium materialGas laser constructional detailsLaser lightTransmission loss
The invention discloses a semiconductor laser-pumped alkali metal laser system with a V-type pumping structure, which comprises a pumping light source, an alkali metal vapor cell, a temperature control system and a laser resonator output mirror. Pumping light is emitted from the pump light source, obliquely incident on the front surface of the alkali metal vapor cell with respect to the axial direction of the alkali metal vapor cell; The temperature control system is arranged close to the rear end face of the alkali metal vapor pool for stabilizing the temperature in the alkali metal vapor pool; The output mirrors of the laser resonator are arranged perpendicular to the axial direction of the alkali metal vapor cell. The output mirrors of the laser resonator and the back end face of the alkali metal vapor cell form the resonator of the laser. The laser is output from the output mirrors of the laser resonator to the outside of the resonator. The invention can realize the natural separation of the pump light and the laser light, avoids the intracavity transmission loss caused by the polarization device, no longer requires the polarization characteristic of the pump light, and can effectively improve the overall electro-optical efficiency of the DPAL system.
Owner:SOUTH WEST INST OF TECHN PHYSICS
Frequency-selective 355nm UV laser in a fiber end-pumped Brewster's angle cavity
ActiveCN104716554BImprove electro-optic efficiencyGood optical modeLaser detailsDivergence anglePrism
The invention relates to a frequency-selective 355nm ultraviolet laser in a Brewster angle cavity pumped by an optical fiber end face. The 808nm semiconductor laser generates the pump laser and focuses it into the coupling head through the 808nm export fiber; the focused 808nm pump laser enters the plano-convex resonator through the plano-convex front mirror; excites the YVO4 crystal to generate 1064nm laser; the 1064nm laser is in the plano-convex resonator Continuously excited and oscillated inside to generate a mixed laser, the mixed laser is emitted from the Brewster angle of the triple frequency LBO crystal, and is divided into beams with different deflection angles, among which the 355nm laser enters the power attenuator after being filtered by the substrate, and enters the expansion Beam mirror, after adjusting the spot diameter and divergence angle, output through the output window mirror. The non-355nm garbage light enters the garbage light recycling bin through the turning prism. The invention has ingenious structure and reasonable design, can keep the temperature of each module inside the laser constant, and stabilize the output power and optical quality of the laser.
Owner:WUXI QINGYUAN LASER TECH
Semiconductor pumping gas laser system based on electromagnetic driving mode
ActiveCN113783084AHigh specific powerLow working fluid consumptionLaser detailsEngineeringLaser light
The invention belongs to the technical field of laser, and particularly relates to a semiconductor pumping gas laser system based on an electromagnetic driving mode. The system comprises a laser working medium generating device based on an electromagnetic driving mode, a plume region and a semiconductor pumping system. According to the invention, when the system works, the laser working medium generating device ionizes a working medium under the action of an electric field and a magnetic field to generate plasmas, the plasmas are ejected in an accelerated manner under the comprehensive action of an electromagnetic field to form a plume region, a working medium which can be used as a laser gain medium in the plume region realizes laser output under the pumping action of the semiconductor pumping system, and due to the fact that the working medium in the plume region moves at a high speed, waste heat generated in the laser pumping process is efficiently discharged; and the system has the advantages of all-electric operation, light weight, compactness, high specific power, efficient thermal control, single-aperture output and the like, and promotes the development of a new generation of laser light sources with high electro-optical efficiency, high beam quality and high average power.
Owner:NAT UNIV OF DEFENSE TECH
Electro-optical q-switch dual-frequency dual-pulse laser lithotripsy system
ActiveCN109512576BAchieve smashAchieve reductionLaser detailsSurgical instrument detailsLaser lithotripsyLaser beams
The electro-optical Q-switch dual-frequency dual-pulse laser lithotripsy system involves the technical field of light-based medical devices, and solves the problem of lack of a laser lithotripsy system that can safely pulverize stones of different sizes, has high electro-optical efficiency, and is easy to change the pulse width. The system includes a total reflection mirror , electro-optic Q-switching switch assembly, drive circuit, controller, pump source, gain medium, output mirror, first focusing mirror, frequency doubling crystal, second focusing mirror, coupling lens and output fiber; electro-optic Q-switching switch assembly and gain The medium is located between the total reflection mirror and the output mirror; the controller controls the operation of the pump source, and controls the voltage on the electro-optic Q-switching switch component through the control drive circuit, so that the system outputs a dual-frequency pulse width of 1μs-1.5μs or 200μs-300μs laser beam. The invention can pulverize large calculi, can also realize soft tissue cutting around the calculus, has high electro-optical efficiency and is easy to change the pulse width, and is suitable for clinical use.
Owner:吉林省科英医疗激光有限责任公司
Alkali metal vapor laser light source for laser interferometer gravitational wave detector
InactiveCN111404018AImprove resolutionIncrease powerActive medium materialGas laser constructional detailsPlane mirrorControl cell
The invention belongs to the technical field of universe observation and laser, and particularly to an alkali metal vapor laser light source for a gravitational wave detector of a laser interferometer. The light source includes a semiconductor pump source, a first convex lens, a first dichroic mirror, an alkali metal steam pool, an etalon, a first concave lens, a second convex lens, a diaphragm, aphase plate, a second concave lens, a second dichroic mirror, a light barrier, a third concave lens, a plane mirror, a polarization splitting prism, a CCD, a third convex lens, a wavelength meter, afirst proportional differential integral control unit, first annular piezoelectric ceramic, a second proportional differential integral control unit, a first temperature controller, a third proportional differential integral control unit, second annular piezoelectric ceramic and a second temperature controller are included. The alkali metal vapor laser light source has the advantages that the high-precision and high-power requirements of the gravitational wave detector light source of the laser interferometer can be met more easily; strong thermal noise caused by high power is effectively suppressed, and necessary conditions are provided for realization of a gravitational wave detector of a third-generation laser interferometer.
Owner:NAT UNIV OF DEFENSE TECH
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