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94results about How to "Improve output beam quality" patented technology
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Q-switched microlaser apparatus and method for use
A monolithic passively Q switched microlaser includes an optically transparent heat conductive element bonded to a gain medium, which is in turn bonded to a saturable absorber, which may also be bonded to a second optically transparent heat conductive element. Only the gain medium and saturable absorber are disposed within the laser resonator.
Owner:KK TOPCON +1
Q-switched microlaser apparatus and method for use
ActiveUS20080247425A1Improve cooling effectGuaranteed uptimeLaser cooling arrangementsResonatorLaser
A monolithic passively Q switched microlaser includes an optically transparent heat conductive element bonded to a gain medium, which is in turn bonded to a saturable absorber, which may also be bonded to a second optically transparent heat conductive element. Only the gain medium and saturable absorber are disposed within the laser resonator.
Owner:KK TOPCON +1
Large Mode Area Optical Fiber
ActiveUS20100195194A1Reduce nonlinear effectsIncrease optical powerLaser using scattering effectsOptical fibre with polarisationRelative attenuationUltrasound attenuation
A large-mode-area (LMA) optical fiber (10) that operates as a single-mode optical fiber. The optical fiber includes a core region (20) surrounded by an inner cladding (32), which in turn is surrounded by an outer cladding (40). The inner cladding includes at least one up-doped ring region (32R1). The ring region is configured to form a large attenuation differential between the higher-order modes and the fundamental mode so only that the fundamental mode remains traveling in the optical fiber. If necessary, the optical fiber can include a bend (10B) having a select “resonant” bend diameter (DB) that increases the relative attenuation of the fundamental and higher-order modes. The optical fiber supports an effective mode field diameter (MFD) of up to 40 μm to 50 μm. As a result, detrimental non-linear effects are suppressed, which allows the optical fiber to carry substantially more optical power than conventional LMA optical fibers. The LMA optical fiber is thus eminently suited for a number of optical-fiber-based applications calling for high optical power, such as fiber lasers and pump sources for wavelength conversion.
Owner:CORNING INC
Multiple spectral section continuous tuning high resolution infrared laser spectral measuring system and method
InactiveCN101089609AMulticomponentGood monochromaticityColor/spectral properties measurementsNear infrared lightWaveplate
Owner:ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Meta-material film for left-hand circular polarization conversion
InactiveCN105161857AWith circular polarization filter functionKeep the functions passedWaveguide type devicesAntennasPhase differenceLight beam
Owner:欧阳征标 +1
Right-hand circularly-polarized conversion meta-material film
InactiveCN105044814AWith circular polarization filter functionImprove output beam qualityPolarising elementsNanoopticsMicro structurePhase difference
Owner:SHENZHEN UNIV
Cladding gain guided microstructure hollow optical fiber
InactiveCN101122651ALarge modulus areaIncrease powerOptical fibre with multilayer core/claddingOptical waveguide light guideMicrostructureLower threshold
An air-cored fiber of cladding gain guided microstructure includes a core area and a cladding area. The invention is characterized in that the core area is air-cored and is filled with air; the cladding area includes an internal cladding area and an external cladding area; the cladding area surrounds the core area; the internal cladding area introduces laser materials and the external cladding area is made of solid materials with evenly distributed refractive index; the thickness of the solid material between the hollow core area and a first air hole in the internal cladding area or the air gap is smaller than one wavelength. The fiber is provided with a great model area. The fiber laser adopting such fiber is more conducive to the realization of high power, in addition to the advantages of high gain, high conversion efficiency, low threshold value, good quality of output beam, simple structure and high reliability.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Solid-state diode pumped laser employing oscillator-amplifier
InactiveUS20040028108A1Increased beam energyHigh beam qualityLaser arrangementsActive medium shape and constructionMultistage amplifierLaser beams
A solid-state laser system includes a solid state oscillator for generating a laser beam and a multiple stage amplifier for increasing an energy of the beam. The oscillator includes an elongated housing having an elongated cavity defined therein, a solid state rod disposed within the cavity, a pumping source for exciting laser active species within the rod, and a resonator including the rod disposed therein for generating a laser beam. The multiple-stage amplifier preferably includes an even number of stages. One or more pairs of compensating stages may be mutually rotated about the beam axis by substantially 90°, with each pumping direction parallel to the polarization direction of the beam. A first stage may be side-pumped by a pumping radiation source in a direction substantially parallel to a polarization direction of the beam generated by the oscillator resonator. A divergence adjusting optic may be disposed before at least one stage of the amplifier for adjusting a divergence of the beam prior to entering the amplifier stage. A divergence adjusting optic may be disposed after the amplifier stage having the divergence adjusting optic before it and before a second amplifier stage, and may be adjustable as to its divergence adjustment.
Owner:LAMBDA PHYSIK
Longitudinal spiral mode transfer optical fiber
InactiveCN104503020AAchieve single-mode outputImprove output beam qualityOptical fibre with multilayer core/claddingEngineeringSilicon dioxide
The invention discloses a longitudinal spiral mode transfer optical fiber, which comprises a fiber core, a cladding and a coating layer; a silica material is taken as a substrate by the fiber core, and comprises at least one active ion and a co-doping agent; a plurality of side cores which surround the fiber core and are distributed in a longitudinal spiral structure are arranged in the cladding; the silica material is adopted by the side cores; each core diameter is at the micron dimension; the spiral cycle is at the millimeter dimension, and the edge-to-edge offset of the side core at the innermost layer and the edge-to-edge offset of the fiber core are at the micron dimension. According to the longitudinal spiral mode transfer optical fiber disclosed by the invention, as the spiral side cores with a loss mechanism are added to the cladding, the spiral side cores can be coupled with a higher order mode in the fiber core, and high loss is provided, and therefore single mode optical fiber transfer of large mode area is realized, and a new way is provided for the development of a high-power fiber laser.
Owner:HUAZHONG UNIV OF SCI & TECH
All-fiber high-power middle- and far-infrared super-continuum spectrum light source
InactiveCN107046220AIncrease output powerEasy to integrateActive medium shape and constructionMode locked fiber laserPicosecond
The invention discloses an all-fiber high-power middle- and far-infrared super-continuum spectrum light source. The all-fiber high-power middle- and far-infrared super-continuum spectrum light source is characterized by comprising a thulium doped mode-locking fiber laser module, a thulium doped fiber amplification module, a first super-continuum (SC) spectrum generation module and a second SC spectrum generation module which are sequentially arranged, wherein the thulium doped mode-locking fiber laser module is used for generating a high-repeated frequency ultrashot pulse picoseconds or femtosecond, the thulium doped fiber amplification module is used for generating a high-power and high-order soliton pulse, the first SC spectrum generation module is used for generating high-power SC spectrum laser of 2-5 micrometers, the second SC spectrum generation module is used for generating high-power SC spectrum laser of 2-14 micrometers, and the thulium doped mode-locking fiber laser module, the thulium doped fiber amplification module, the first SC spectrum generation module and the second SC spectrum generation module all employ single-mode fibers. The all-fiber high-power middle- and far-infrared super-continuum spectrum light source has the advantages of low cost, high conversion efficiency, good output beam quality, wide bandwidth, simple and compact structure and high adaptive capacity to an environment.
Owner:NINGBO UNIV
Two-dimensional vertical-cavity surface-emitting laser array with high light beam quality
InactiveCN101640380AImprove output beam qualityImprove reliabilityLaser detailsSemiconductor lasersVertical-cavity surface-emitting laserLight beam
The invention discloses a two-dimensional vertical-cavity surface-emitting laser array with high light beam quality, belonging to the technical filed of a semiconductor laser device, and relating to alaser device array. The invention aims to solve the technical problems of providing a two-dimensional vertical-cavity surface-emitting laser array with high light beam quality. The technical scheme to solve the technical problems comprises a surface electrode, a central zone single unit laser device, first circular ring unit laser devices and second circular ring unit laser devices, wherein, thecenter of the array is the central zone single unit laser device, and the first circular ring unit laser devices are evenly distributed on a concentric circular ring on the outer side of the array; the second circular ring unit laser devices are evenly distributed on the concentric circular ring on the outer side of the first circular ring, and the number of the first and the second circular ringunit laser devices is same; the diameters of the unit laser devices on the same circular ring are same, and the diameters of the unit laser devices on different circular rings respectively reduce frominternal to external; the central zone unit laser device and the unit laser devices on the same direction of each concentric circular ring are in rayed arrangement on the same radius.
Owner:CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
A loop concave output mirror laser resonance cavity
InactiveCN101262113AIncrease powerImprove output beam qualityOptical resonator shape and constructionResonant cavityDivergence angle
The invention discloses a laser resonant cavity with an annular and a concave output mirror, which comprises a reflecting mirror, a laser medium and an output mirror; the output mirror is an annular concave mirror of which the working surface comprises one or a plurality of homocentric, annular and circular arc shaped concave cambers; the central part of the working surface of the output mirror can also be a circular working surface or the central part of the out mirror can be non-working surface or hollowness; an annular and concave reflecting mirror can also be adopted by the laser resonant cavity of the invention. The laser resonant cavity provided by the invention has the advantages of simple processing, convenient adjustment, steady operation, large available mode volume, very small divergence angle and good beam quality, thus being able to be applicable to gas lasesr or solid lasers with medium and high power, in particular to large volume gain medium and cylindrical and toroidal gain medium.
Owner:HUAZHONG UNIV OF SCI & TECH
All-optical fiber broadband flat intermediate-infrared super-continuum spectrum light source
ActiveCN105826800ALow dispersion valueHigh nonlinear coefficientActive medium shape and constructionMode locked fiber laserCoupling
The invention discloses an all-optical fiber broadband flat intermediate-infrared super-continuum spectrum light source. The light source is characterized in that the light source comprises a thulium-doped mode-locked fiber laser module used for generating ultra-short pulses, a thulium-doped fiber amplification module used for generating high-power and high-order soliton pulses, a 2-3 micron high-power SC spectrum generation module used for generating 2-3 micron high-power SC spectrum laser, a silica fiber and chalcogenide fiber efficiently-coupled and encapsulated module and a 2-5 micron intermediate-infrared broadband flat SC spectrum generation module for generating a 10dB-bandwidth coverage 2-5 micron intermediate-infrared band broadband flat SC spectrum, wherein the thulium-doped mode-locked fiber laser module, the thulium-doped fiber amplification module, the 2-3 micron high-power SC spectrum generation module, the silica fiber and chalcogenide fiber efficiently-coupled and encapsulated module and the 2-5 micron intermediate-infrared broadband flat SC spectrum generation module are arranged sequentially. According to the light source, quartz optical fiber tapering and lens optical fibers are used in a matched manner, so that efficient coupling of quartz optical fibers and chalcogenide optical fibers can be realized, and pumping efficiency can be improved, the high-quality full-optical fiber broadband flat intermediate-infrared SC (super-continuum spectrum) light source can be realized; since the light source is of a full-optical fiber structure, the intermediate-infrared SC spectrum light source has the advantages of low cost, high conversion efficiency, high-quality output beams and simple and compact structure.
Owner:NINGBO UNIV
Solid-state laser generating green continuous laser and method thereof
A solid-state laser generating a green continuous laser and a method thereof are disclosed. The laser comprises a pumping source used for generating 798-801nm pumping light, a light splitting unit, an optical path conversion unit, an Er3+:YAlO3 crystal, a resonant cavity and two Fabry-Perot etalons. The light splitting unit is used for splitting the pumping light into a first light beam and a second light beam. The first light beam is entered into a first end surface of a laser crystal. The second light beam is entered into a second end surface of the laser crystal through the optical path conversion unit. The laser crystal is used for generating up-conversion fluorescence under excitation of the first light beam and the second light beam. The resonant cavity is used for outputting a laser of a green light wave band. The two Fabry-Perot etalons are located in the resonant cavity and are used for compressing a line width of an output laser. The structure of the laser is simple, cost is low and green-light continuous output of a narrow line width is realized. The invention also provides a method of generating the green-light continuous laser. Advantages that output laser beam quality is good; the line width is narrow; optical to optical conversion efficiency is high and so on are possessed.
Owner:HEILONGJIANG INST OF TECH
Off-axis spectrum beam combination device of laser diode array
InactiveCN102082396AImprove output beam qualityHigh beam qualitySemiconductor laser arrangementsLaser arrangementsCouplingDivergence angle
The invention relates to an off-axis spectrum beam combination device of a laser diode array, which comprises a laser diode array and a fast axis collimation lens, wherein the rear side of the fast axis collimation lens is provided with a first lens, a second lens and a high-reflection mirror are sequentially arranged above the rear of the first lens, and rear end faces of the high-reflection mirror and the second lens as well as the first lens and the diode array form an off-axis outer feedback cavity; a diffraction grating is arranged below the rear of the first lens, an output coupling mirror is arranged between the diffraction grating and the first lens, a spectrum beam combination structure is formed among the output coupling mirror and the diffraction grating as well as the first lens; and light rays emitted upwards by the laser diode array are subjected to divergence-angle compression through the first lens and the second lens and then projected on the high-reflection mirror, light rays parallel to the high-reflection mirror are reflected to the fast axis collimation lens, light rays emitted downwards by the laser diode array irradiate to the diffraction grating through the lower part of the first lens, and are processed through the output coupling mirror after being diffracted by the diffraction grating, part of the light rays are fed back to an active region of the diode array along the original path, and part of the light rays are output used as laser. The off-axis spectrum beam combination device has a simple and compact structure, can improve the beam quality of the two-dimensional laser diode array and is safe and reliable.
Owner:JIANGNAN UNIV
Winding device for active optical fiber and fiber winding method
The invention discloses a winding device for an active optical fiber and a fiber winding method. The winding device for the active optical fiber comprises a heat dissipation disk, wherein the heat dissipation disk adopts a track structure, the inner wall of the heat dissipation disk is an inclined surface, a groove for winding the active optical fiber is formed in the inclined surface, and the adjacent groove parts are spaced by a certain interval. With the adoption of the winding device and the fiber winding method, heat of the active optical fiber can be better dissipated, besides, the optical fiber extends naturally in the winding process so as to avoid pressure stress caused by fixation by the aid of external force, meanwhile, the difference of inner and outer winding diameters of the optical fiber is small, high-order mode lasers are effectively filtered out, and near-fundamental-mode laser output with the high laser beam quality is obtained.
Owner:JIANGSU SKYERALASER TECH
Graphene photonic crystal terahertz amplifier
InactiveCN104793427AIncreasing the thicknessSolve non-tunable problemsSolid masersOptical light guidesPhotonic bandgapPhotonics
The invention discloses a graphene photonic crystal terahertz amplifier and a regulating and control method thereof. Due to the characteristics that the conductivity of graphene at specific temperature and bias voltage is a negative value in a terahertz wave band, the graphene can be used as a terahertz wave gain medium, and the function of the terahertz amplifier can be achieved by using a periodic 'graphene-single crystal silicon layer' one-dimensional photonic crystal structure. According to the graphene photonic crystal terahertz amplifier, different bias voltages can be applied by alternatively introducing positive and negative electrodes to the graphene which is periodically arranged, and active regulation and control on terahertz wave amplification and working frequency are achieved. As the one-dimensional photonic crystal structure is combined with the terahertz gain characteristics of the graphene, due to the cascade connection of a plurality of pieces of graphene, and the photonic band gap, the slow light enhancement, the F-P effect and the mode competitive effect of the one-dimensional photonic crystal structure, the gain amplification coefficient and the Q-value of the terahertz waves in a single transmission mode can be effectively increased, and the single-frequency terahertz wave output with the high gain and high Q-value is achieved. The graphene photonic crystal terahertz amplifier works in a frequency band of 1-2THz, the working frequency can be tuned according to working voltage, the maximum output gain is greater than 30dB, the Q-value is greater than 50, and the graphene photonic crystal terahertz amplifier is a large-format high-performance terahertz amplifier.
Owner:NANKAI UNIV
Adiabatic bend transitions for multimode fibers
ActiveUS20110043898A1Minimizing modal couplingImprove efficiencyCladded optical fibreCoupling light guidesReverse converterFiber
Guided adiabatic bend transitions for multimode fibers are presented to preserve the power of guided light in the fundamental mode while guiding from one level of curvature to another for improved operation of mode filters and fiber amplifiers. A method is provided to find the guidance path. Implementations of these transducers include modal power back converters, and guidance paths into and out of higher order mode filtering devices which work on bending. A spiral structure is shown to incorporate adiabatic bends for a forward-pumped fiber amplifier.
Owner:KONGSBERG MARITIME
A loop concave reflector laser resonance cavity
InactiveCN101262114AIncrease powerImprove output beam qualityOptical resonator shape and constructionLaser resonanceResonator
The invention discloses a toroidal concave reflector laser cavity resonator which comprises a reflector, a laser medium and an output mirror and the toroidal concave reflector laser cavity resonator is characterized in that: the reflector is toroidal and concave and comprises one or more homocentric and toroidal arc concave faces. The invention can make the center of the reflecting surface into a round surface or the center of the reflector surface into a non reflecting surface or an air core. The invention can also adopt a toroidal concave output mirror. The laser cavity resonator of the invention has simple processing, convenient adjustment, stable working, large available mode volume, very small divergence angle and good beam quality, thus being applicable to middle, high power gas lasers or solid lasers and especially being applicable to gain medium of large volume and toroidal and columnar gain medium.
Owner:HUAZHONG UNIV OF SCI & TECH
Low-energy strong-beam gate-control electron gun
InactiveCN107768218AReduce the maximum field strengthImprove output beam qualityElectrode and associated part arrangementsAcceleratorsBeam energyHigh pressure
The invention discloses a low-energy strong-beam gate-control electron gun. The low-energy strong-beam gate-control electron gun comprises an emitter, a focusing electrode, an intermediate electrode and a positive electrode, wherein the emitter and the focusing electrode are externally connected with the same negative high voltage power supply; the intermediate electrode is externally connected with a positive high voltage power supply; the positive high voltage of the intermediate electrode and the negative high voltage of the emitter form an accelerated electric field; the positive electrodeis grounded; the zero potential of the positive electrode and the positive high voltage of the intermediate electrode form a decelerated electric field; the emitter emits electron beams by using a negative gate assembly, and focuses the electron beams by using the focusing electrode, and meanwhile, can accelerate the electron beams through the accelerated electric field; finally, the electron beams are decelerated through the decelerated electric field; and the electrode shapes and distances between electrodes can be corrected by CST particle tracking and a PIC algorithm. The low-energy strong-beam gate-control electron gun is high in beam and can keep low beam energy dissipation, has the advantages of low energy, high beam guiding coefficient, high compression ratio, long service life and the like, and has relatively high practical value and wide application prospect.
Owner:HUAZHONG UNIV OF SCI & TECH
Laser beam quality control method for ultra-multi-pass amplification system
InactiveCN106129781AAvoid multi-pass magnification aberration accumulation problemOptimize the effect of wavefront correctionLaser arrangementsOptical devices for laserLight beamOptoelectronics
The invention relates to a laser beam quality control method for an ultra-multi-pass amplification system, and belongs to the technical field of laser equipment. The laser beam quality control method comprises the steps of measuring internal aberration of an amplification cavity, and correcting the internal aberration; and measuring the aberration of a full light path, and correcting the aberration of the full light path. According to the method, the aberration correction is carried out in different steps; compared with the one-step correction method in the prior art, the laser beam quality control method provided by the invention can avoid the problem of multi-pass amplification aberration accumulation, and the optimal wave-front correction effect can be achieved, so that the laser beam quality control method is applicable to the ultra-multi-pass amplification laser beam quality control.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
End-face pump green light laser capable of regulating Q cavity external frequency multiplication actively
InactiveCN101436752ANovel ideaReasonable designOptical resonator shape and constructionHigh power densityPeak value
The invention relates to an end-pumped active Q-regulated outer cavity frequency doubling green-light laser which comprises a laser pumping source, an energy transmission fiber, an optical coupling system, a V-type folding resonant cavity, a laser crystal, an active Q-regulated switch, a steering mirror, a focusing lens, a nonlinear frequency doubling crystal, a collimating mirror and a harmonic wave separating mirror. Quasi continuous basic frequency light with high peak power is produced through an active Q-regulated mode and is output; the output basic frequency light is focalized in the nonlinear frequency doubling crystal placed outside a cavity through the lens and produces fine light spot and high power density of the basic frequency light; and green light is output after the frequency doubling crystal. Compared with an inner cavity frequency doubling mode, the outer cavity frequency doubling mode has better stability, a flexible structure and easy regulation. In the outer cavity frequency doubling green-light laser, the efficiency of conversion from the basic frequency light to the frequency doubling light is more than 50 percent; and the average power of the green light is more than 4.5 W. The outer cavity frequency doubling green-light laser is widely applied in industry processing, scientific research, medical treatment, military affairs and other fields.
Owner:WUHAN LINGYUN PHOTOELECTRONICS SYST
One dimensional all-metal slab waveguide gas laser
ActiveUS20050069008A1Increase manufacturing costReduce equipment costsGas laser constructional detailsOptical cavityLight beam
A one dimension all-metal slab waveguide gas laser comprises a slab waveguide gas discharge area and an optical resonator disposed in a metal vacuum chamber. The gas discharge area is formed by a top and a bottom metal electrodes and metal supporting blocks insolated with the electrodes. A metal liner plate and a metal press plate are sequentially disposed on upside of the metal electrodes. A metal supporting plate is disposed at underside of the metal electrodes. The metal top electrodes are connected with a supply power through link pins of the metal electrodes. An output mirror and a feedback mirror are respectively arranged at two sides of the optical resonator. An output window of the laser is disposed in the vacuum chamber. The present one dimension waveguide gas laser has advantages of good quality of high thermo conducting and simple processing as well as low cost, and can avoid appearing modulation of the output power of the laser which is caused by high order mode of the guide in current two dimension slab guide laser, thereby the quality of optical beam of the laser is improved.
Owner:BEIJING BDHLASER SCI & TECH
Dual-flow common combustor chemical laser
InactiveUS6847674B1Light weightEffective recoveryExcitation process/apparatusGenerators/motorsCombustion chamberEngineering
The invention herein is directed to a dual-chamber combustion laser assembly having lighter weight (per unit flow area), a more compact, flexible configuration for packaging in spacecraft, aircraft, or ground mobile vehicles, higher mass efficiency from lower heat loss and proven power extraction efficiency of linear lasers, superior output beam quality by incremental compensation of gain medium optical path disturbances and by reduction in time-dependent variations in structural and gain medium characteristics, lower cost and shorter fabrication time for modular dual flow laser and linear optics, more efficient pressure recovery with side-wall isolation nozzles and compact diffuser configurations, and increased small signal gains for more efficient extraction of overtone power.
Owner:LEIDOS
Medium and small power LD parallelly pumped high-power green laser
InactiveCN105006732AReduce hyperthermiaImprove thermal stabilityOptical resonator shape and constructionActive medium materialOptoelectronicsResonant cavity
The invention discloses a medium and small power LD parallelly pumped high-power green laser, which comprises a resonant cavity, frequency doubling crystals and parallelly connected end-pumped lasers, wherein the frequency doubling crystals are located in the resonant cavity so as to form a frequency doubling resonant cavity, each end-pumped laser comprises an end-pumped device formed by a pumping source, a coupling mirror and a laser crystal, a sub resonant cavity formed by a first totally reflecting mirror and a second totally reflecting mirror, a Q-switch arranged in the sub resonant cavity and a first output mirror used for reflecting and outputting fundamental frequency pulse laser, an included angle between an optical axis of each end-pumped laser and the first output mirror inside is 45 degrees, and the fundamental frequency pulse laser outputted by each first output mirror generates frequency doubling green laser after passing through the frequency doubling crystal, and the frequency doubling green laser is combined into a beam in the resonant cavity and then outputted from a second output mirror of the resonant cavity. The medium and low power LD parallelly pumped high-power green laser can acquire high laser power output and high beam quality.
Owner:广州安特激光技术有限公司
Large mode area optical fiber
ActiveUS8797642B2Increase optical powerSpeed up the descentOptical fibre with polarisationLaser using scattering effectsRelative attenuationUltrasound attenuation
Owner:CORNING INC
Multi-stage taper optical fiber phase conjugation mirror and device and method for laser double-journey amplification thereof
InactiveCN103474866AHigh damage thresholdLow damage thresholdActive medium shape and constructionHigh power lasersMagnetic rotation
The invention discloses a multi-stage taper optical fiber phase conjugation mirror and a device and method for laser double-journey amplification of the multi-stage taper optical fiber phase conjugation mirror. The device for laser double-journey amplification comprises a laser, a first polarizing film, a lambada / 2 wave plate, a Faraday magnetic rotation device, a second polarizing film, a laser amplifier, a lambada / 4 wave plate, a first lens, a second lens and multi-stage taper optical fibers, wherein the laser, the first polarizing film, the lambada / 2 wave plate, the Faraday magnetic rotation device, the second polarizing film, the laser amplifier, the lambada / 4 wave plate, the first lens, the second lens and the multi-stage taper optical fibers are sequentially placed in the optical axis direction. The first lens is a convex lens, the second lens is a concave lens, a telescope system is formed by the first lens and the second lens, the focal length f1 of the first lens ranges from 100mm to 1000mm, and the focal length f2 of the second lens ranges from -20mm to -1000mm; the distance D1 between the first lens and the second lens satisfies the equation that D1=f1+f2, wherein the D1 ranges from 20mm to 1000mm. The multi-stage taper optical fiber phase conjugation mirror is high in damage threshold, low in stimulated brillouin scattering threshold, high in reflectivity and wide in dynamic working range, therefore, the conjugation mirror is applied to a high-power laser, and damage is avoided.
Owner:ZHEJIANG UNIV
Broadband laser system chromatic aberration dynamic compensation device
ActiveCN109407332AEasy to adjustMeet the requirements of chromatic aberration compensationOptical elementsImage transferCompensation effect
The invention discloses a broadband laser system chromatic aberration dynamic compensation device, which comprises a first half-wave plate, a polarizing spectroscope, a first quarter-wave plate, a convex lens, a concave lens group, a concave mirror, a first two-dimensional translation stage, a second two-dimensional translation stage, a second quarter-wave plate, a plane mirror, and a second half-wave plate. The broadband laser system chromatic aberration dynamic compensation device uses image transfer structural design and can significantly improve output beam quality by spatial filtering andsmall hole filtering. The relative distance among the concave lens group, the concave mirror and the convex lens can be controlled by moving the two-dimensional translation stage. The broadband lasersystem chromatic aberration dynamic compensation device can gradually change a beam diameter emitted to the concave lens group, thereby continuously controlling a chromatic aberration compensation amount and being advantageous for precisely optimizing a chromatic aberration compensation effect. The device of the invention can be applied as a chromatic aberration compensation unit to an ultra-short pulse laser system, provides full system chromatic aberration compensation, can also be used in a common optical system, and has a large chromatic aberration compensation range.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Low-loss bending-resistant fiber to home
InactiveCN104267460AReduce manufacturing costSimple structureOptical fibre with multilayer core/claddingFiberRare earth
The invention discloses a low-loss bending-resistant fiber to the home. The low-loss bending-resistant fiber to the home is characterized in that a rare-earth-doped fiber core is adopted, an inner cladding layer and an outer cladding layer are formed on the surface of the rare-earth-doped fiber core from interior to exterior, and a primary coating layer, a buffering layer, a secondary coating layer and an outer protection layer are arranged on the surface of the cladding layer from interior to exterior in sequence. The low-loss bending-resistant fiber to the home is simple in structure, the transmission loss is effectively reduced, the brittleness of the fiber is improved, the bending performance of the low-loss bending-resistant fiber to the home is good, the low-loss bending-resistant fiber to the home can be directly arranged in the fields of indoor parts, electric control cabinets, ship electric devices and the like, and wiring connection is flexible and convenient.
Owner:安徽天龙电器线缆集团有限公司
Method and apparatus for continuous wave harmonic laser
InactiveUS7848012B2Extend your lifeMaintenance cost and downtimeOptical resonator shape and constructionLight demodulationFiberFrequency conversion
An apparatus for producing coherent, continuous wave, ultraviolet light, includes one or more source lasers in the visible or near-infrared frequency range. The apparatus also includes one or more frequency conversion stages. Each of the one or more frequency conversion stages includes one or more reflectors, an optical resonator, one or more waveguide components, or one or more fiber optic components. At least one of the one or more frequency conversion stages includes a huntite-type aluminum double borate nonlinear optical material to produce light having a wavelength between 190 and 350 nm. The huntite-type aluminum double borate material has a composition given by MAl3B4O12, where M is one or a plural combination of elements {Sc, La, Y, or Lu}.
Owner:VOXTEL
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