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46results about How to "High damage resistance threshold" patented technology
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Polarization beam-combination device for pulsed laser
InactiveCN103033944AAchieve coaxial synthesisHigh synthesis efficiencyLaser detailsCoupling light guidesBeam splitterOptoelectronics
The invention discloses a polarization beam-combination device for a pulsed laser. The polarization beam-combination device comprises the pulsed laser, an input beam splitter, n laser amplifiers and n-1 polarization coherent beam-combination units. The pulsed laser outputs a beam of seed light. The input beam splitter divides the seed light into n sub-seed light beams. The n laser amplifiers respectively carry out power amplification to the n sub-seed light beams. The n-1 polarization coherent beam-combination units carry out pairwise polarization in-phase beam-combination for n-1 times to n laser beams output by the n laser amplifiers. N is a natural number which is bigger than or equal to two. An output end of the polarization beam-combination device is connected with an output beam splitter. A hard light output end of the output beam splitter is used as an output end of the polarization coherent beam-combination units. Light output from a low light output end of the output beam splitter shoots into a relative phase detection module of a drive phase control module, and the relative phase detection module enables phase positions of two laser beams to be consistent. Through adoption of a polarization detection method, the polarization beam-combination device detects the relative phase positions of the two laser beams, and is capable of achieving coaxial combination of a plurality of coherent light beams, high in combined efficiency and good in beam quality.
Owner:广东华快光子科技有限公司
Two-dimensional stratified material based practical saturable absorber and production method thereof
InactiveCN104218443AWide wavelength rangeReduce absorption lossActive medium materialActive medium shape and constructionMode-lockingWavelength
The invention relates to a two-dimensional stratified material based practical saturable absorber and a production method thereof, and belongs to the field of saturable absorbers of lasers. The two-dimensional stratified material based practical saturable absorber comprises a substrate, a high-reflection layer, a saturable absorption layer and a functional layer. One end face of the functional layer is connected with the saturable absorption layer, one end face of the saturable absorption layer is connected with the high-reflection layer, and one end face of the high-reflection layer is connected with the substrate. By the two-dimensional stratified material based practical saturable absorber and the production method thereof, application of the lasers, such as Q-switching, mode locking and optical signal processing, is realized. By the high-reflection layer formed by composite materials, absorption loss is reduced and reflection rate is increased, and optimal material combinations can be found in terms of different wave lengths.
Owner:鲍小志
Polarizer of optical body
ActiveCN101587202AOptical structure is easy to realizeReduce light lossLaser detailsPolarising elementsWedge angleMicrochip laser
The invention relates to laser field, particularly relates to optical polarizer field. Optical principle of the invention is adoption of two wedge angle crystals with same index of refraction and made of same optical materials, relative slope of the wedge angle crystals is plated with optical material coating with different index of refraction, a single block is composed between the wedge angle crystals by optical cement or deepened optical cement. The vertical light pass surface and optical cement film of the middle slope compose a brewster angel theta, thereby a flat type portion polarizer is composed for transparent transmission of P weight polarized light and partial reflection of S weight polarized light. The invention uses the technical scheme, has a optical structure of easy implementation, less optical loss, higher damage resistance threshold value, which is suitable for producing polarizer in laser vcavity and particularly in microchip laser, and can implement efficient integration with other optical crystals or optical device.
Owner:SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
High-power laser multipath optical fiber sampling time waveform measuring device
ActiveCN101782436AReduce distractionsImproved power balance diagnostics between bundlesInstrumentsPhotovoltaic detectorsHigh power lasers
The invention relates to a high-power laser multipath optical fiber sampling time waveform measuring device which is characterized by comprising a high-speed digital oscilloscope and a high-power laser to be measured; a first photoelectric detector is connected with the first input end of the high-speed digital oscilloscope through a first cable to form an external trigger circuit; multiple paths of sampling optical paths are arranged at plurality of points to be measured of the high-power laser to be measured; each path of sampling optical path comprises a sampling mirror, an optical attenuator, a coupling device and a sampling optical fiber which are sequentially connected; and the sampling optical fibers of the multiple paths of sampling optical paths are connected with the input end of an optical fiber combiner, the output end of the optical fiber combiner is connected with a second photoelectric detector, and the output end of the second photoelectric detector is connected with the second input end of the high-speed digital oscilloscope through a second cable. The invention has the advantages of small volume, strong anti-interference capability, adjustable length, flexible light beam guidance, convenient integrated control and the like.
Owner:SHANGHAI LASER POWER EQUIP CO LTD
Preparation method of gray track resistance KTiOPO (GTR-KTP) crystals
ActiveCN103451731AAvoid pollutionImprove stabilityPolycrystalline material growthBy pulling from meltGreen-lightCrystal
The invention relates to a preparation method of gray track resistance KTiOPO (GTR-KTP) crystals. The method comprises the following steps: firstly preparing a KH2PO4 crystal material, and then carrying out sectional heating to form an even and stable high-temperature solution under a super environment; adopting a method of combining the top end with lifting to grow the GTR-KTP crystals. According to the KTP crystals prepared by the preparation method, an absorption coefficient of the KTP crystals is reduced; a gray track can be effectively prevented, so that the frequency doubling conversion efficiency of the KTP crystals is obviously enhanced; the GTR-KTP crystals are irradiated by a 100mw and 532nm of green light within 1000 seconds in a test; absorption of the system is basically kept stable; a good gray track resistant effect is displayed.
Owner:INNOWIT
Nonlinear optical crystal and preparation method thereof
InactiveCN103132147AGood nonlinear optical effectHigh damage resistance thresholdPolycrystalline material growthBy pulling from meltNonlinear optical crystalSpace group
The invention discloses a nonlinear optical crystal, which has a crystal structure the same as that of a YCa4O(BO3)3 crystal, and belongs to the field of a Cm space group and an m point group. The nonlinear optical crystal is a samarium-yttrium-calcium-oxygen borate crystal; the chemical formula of the nonlinear optical crystal is SmxY1-xCa4O(BO3)3, wherein x is more than 0 and less than 1; and the nonlinear optical crystal is obtained through a pulling method by adopting CaCO3, Y2O3, Sm2O3 and H3BO3 in stoichiometric proportion. The samarium-yttrium-calcium-oxygen borate crystal disclosed by the invention has good nonlinear optical property, can be used for manufacturing a laser nonlinear optical device and can increase the transformation and amplification efficiency of the laser nonlinear optical device by absorbing idler-frequency light with a specific wavelength.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
A laser-damage-resistant solid-state laser resonator
ActiveCN109167240AHigh damage resistance thresholdAvoid platingPrismsOptical resonator shape and constructionResonant cavitySpecial design
The invention relates to a laser damage resistant solid-state laser resonator, comprising a first total reflection prism (1), a laser gain medium (2), a coupling output prism (3), and a second total reflection prism (4). In order to solve the problem that the reliability of laser is not high due to the damage of optical element film, The invention adopts all optical elements which are not coated as resonant cavity elements, realizes high transmission, high reflection and specific proportion transmission of laser light through special design material and incident angle, thereby realizing oscillation output of laser light, so that laser damage threshold of laser light can be greatly increased, and laser reliability can be further improved.
Owner:BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
Oblique incidence high-reflection film laser electric field distribution design method
InactiveCN104330895AAchieve distributionImprove absorption rateOptical elementsOptoelectronicsAbsorption rate
The invention belongs to the technical field of film electric field distribution design, and in particular relates to an oblique incidence high-reflection film laser electric field distribution design method. The invention provides a high-reflection film laser electric field distribution design method which comprises the following steps: pre-setting the extinction coefficient of a film material, optimizing the absorption rate of a high-reflection film system structure through values, and controlling the absorption rate to be minimum, thereby distributing a laser electric field, and finally preventing a film boundary from intensity electric field distribution. By adopting the scheme, a high-reflection film laser electric field distribution design in oblique incidence can be achieved; by adjusting the electric field distribution of laser, the film boundary is prevented from an intensive electric field, the absorption rate can be controlled to be minimal, the anti-damage threshold of laser can be increased, and the absorption loss can be reduced.
Owner:THE 3RD ACAD 8358TH RES INST OF CASC
Laser tail lens assembly for selecting angular polarization
The invention belongs to the technical field of optics, and particularly relates to a laser tail lens assembly for selecting angular polarization. The laser tail lens assembly for selecting angular polarization comprises an inner conical lens and an outer conical lens, wherein an incident hole is formed in the center of the inner conical lens, the outer conical lens is provided with an outer conical reflecting surface and an annular reflecting surface, an inner conical reflecting surface of the inner conical lens is opposite to the outer conical reflecting surface, the inner conical reflecting surface, the annular reflecting surface and the outer conical reflecting surface are connected in sequence to form a hollow multi-time-reflecting combined structure, and the conical angles of the inner conical reflecting surface and the outer conical reflecting surface are both 90 degrees. The laser tail lens assembly for selecting angular polarization is simple in structure, good in symmetry, high in maladjustment resistance, good in heat stability and mechanical performance, easy to manufacture, low in cost and capable of being widely applied to gas, solid and semiconductor lasers to generate high-power and high-purity angular polarization light.
Owner:WUHAN BOTH WIN OPTOELECTRONICS
Saturable absorber with saturable absorption and anti-saturable absorption characteristics and application thereof
ActiveCN113314929AImprove output characteristicsCompressed Pulse WidthActive medium shape and constructionComposite filmGain
The invention belongs to the technical field of fiber laser, and discloses a saturable absorber with saturable absorption and anti-saturable absorption characteristics, application thereof and a passive Q-switched fiber laser device, and the saturable absorber comprises a 980nm LD pumping source, a 980nm / 1550nm wavelength division multiplexer, a 10% output coupler, an erbium-doped gain fiber, a polarization independent isolator, a single-mode fiber, a polarization controller and a Fe3O4-PI composite film, wherein the Fe3O4-PI composite film is cut into a square with the side length of 0.5 mm and then placed on the optical fiber jumper head. According to the passive Q-switched fiber laser, the output characteristics of the passive Q-switched fiber laser are adjusted and optimized through the saturable absorber with saturable absorption and anti-saturable absorption characteristics, the output characteristics of the passive Q-switched fiber laser are greatly optimized, the pulse width and the repetition frequency are compressed, meanwhile, the monopulse energy and the peak power are improved, the output performance of the passive Q-switched fiber laser is improved, and the Q-switched pulse is high in stability.
Owner:CHANGCHUN UNIV OF SCI & TECH
Small-conical-angle W-shaped axicon for angle polarization selection
The invention discloses a small-conical-angle W-shaped axicon for angle polarization selection. The reflecting plane of the small-conical-angle W-shaped axicon is formed by an outer conical surface positioned on a central area and an inner conical surface on a peripheral area, wherein the inner conical surface and the outer conical surface form a hollow reflecting structure. The geometrical relationship between a semi-cone angle alpha of the outer conical surface and a semi-cone angle beta of the inner conical surface satisfies 3alpha+2beta=90 degrees, and 0 degree < alpha<30 degrees. The small-conical-angle W-shaped axicon has the advantages of simple structure, good symmetry, high anti-imbalance ability, excellent thermally-stability performance and mechanical property, simple manufacture process and low cost. The small-conical-angle W-shaped axicon is applicable to gas, solid and semiconductor lasers to generate high power and high-purity angle polarized light.
Owner:HUAZHONG UNIV OF SCI & TECH +1
A 589nm laser based on co-cavity double-Raman medium and laser sum frequency
ActiveCN106558829AEasy to integrateHigh damage resistance thresholdLaser using scattering effectsPotassium gadolinium tungstatePhysics
A 589nm laser based on co-cavity double-Raman medium and laser sum frequency comprises a 1064nm laser source. Along the laser output direction of the 1064nm laser source, there are successively provided a half slide, a Faraday isolator, the front cavity mirror of a Raman laser, potassium gadolinium tungstate crystal (chemical formula: KGa(WO4)2, hereinafter referred to as KGW crystal), barium nitrate crystal (chemical formula: Ba(NO3)2, hereinafter referred to as BN crystal), the rear cavity mirror of the Raman laser, a first filter lens, a reflector, nonlinear crystal and a second filter lens. 1064nm pumping laser is coupled into a Raman laser resonator, 1159nm laser is generated by means of Raman frequency shift of the KGW crystal, the remaining 1064nm pumping laser generates 1197.8nm laser by means of Raman frequency shift of the BN crystal. The 1159nm laser and the 1197.8nm laser generate 589nm laser in the nonlinear crystal through sum frequency. The 589nm laser has the advantages of simple structure and convenient integration, can be used as a laser source for producing an artificial sodium guide star, and has important significance in the aspects of astronomy and national defense.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Combined interference chamber for chemical laser device wavelength choice output
ActiveCN107919603AEasy to distinguishDifficult to distinguish finelyLaser detailsResonant cavityBeam splitting
The invention relates to a combined interference chamber for chemical laser device wavelength choice output. A stable chamber structure is adopted in the combined interference chamber which comprisesa recessed surface reflecting mirror, a 45 degree beam splitting sheet and two plane reflecting mirrors. The 45 degree beam splitting sheet and the two plane reflecting mirrors form an interference sub-chamber, and reflecting films having different reflectivity for laser light with different wavelengths are respectively plated on reflecting planes of the recessed surface reflector and the plane reflecting mirrors. Via control over reflectivity parameters of optical elements in a laser resonant cavity, wavelengths of a laser device can be chosen roughly; interference effects are used for closely adjacent wavelengths can be chosen in a careful way via adjustment of parameters such as a length of the interference sub-chamber, a beam splitting ratio of a beam splitting sheet and the like; thelaser device is enabled to output laser light with any single wavelength.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
A design method for electric field distribution of obliquely incident high-reflection thin-film laser
InactiveCN104330895BAchieve distributionImprove absorption rateOptical elementsOptoelectronicsLaser light
The invention belongs to the technical field of film electric field distribution design, and in particular relates to an oblique incidence high-reflection film laser electric field distribution design method. The invention provides a high-reflection film laser electric field distribution design method which comprises the following steps: pre-setting the extinction coefficient of a film material, optimizing the absorption rate of a high-reflection film system structure through values, and controlling the absorption rate to be minimum, thereby distributing a laser electric field, and finally preventing a film boundary from intensity electric field distribution. By adopting the scheme, a high-reflection film laser electric field distribution design in oblique incidence can be achieved; by adjusting the electric field distribution of laser, the film boundary is prevented from an intensive electric field, the absorption rate can be controlled to be minimal, the anti-damage threshold of laser can be increased, and the absorption loss can be reduced.
Owner:THE 3RD ACAD 8358TH RES INST OF CASC
V-shaped and W-shaped combined mirror structure for selecting angular polarization
The invention belongs to the technical field of optics, and particularly relates to a V-shaped and W-shaped combined mirror structure for selecting angular polarization. The V-shaped and W-shaped combined mirror structure comprises a V-shaped cone mirror and a W-shaped cone mirror which are fixed together and centrally symmetric, an incident hole is formed in the center of the V-shaped cone mirror, a reflecting surface of the V-shaped cone mirror comprises an outer cone surface and an inner cone surface, a reflecting surface of the W-shaped cone mirror comprises an outer cone reflecting surface and an inner cone reflecting surface, the outer cone reflecting surface is positioned in a central region, the inner cone reflecting surface is positioned in a peripheral region, the outer cone surface and the inner cone surface are respectively opposite to the inner cone reflecting surface, and cone angles of the outer cone surface, the inner cone surface, the outer cone reflecting surface and the inner cone reflecting surface are 90 degrees. The V-shaped and W-shaped combined mirror structure is simple in structure, fine in symmetry, high in misalignment resistance, excellent in heat stability and mechanical performance, simple to manufacture and low in cost, and can be widely applied to gas, solid and semiconductor lasers for generating high-power and high-purity angular polarization light.
Owner:WUHAN CO WALKING LASER TECH LTD
A Combined Interferometric Cavity for Wavelength Selective Output of Chemical Lasers
ActiveCN107919603BDifficult to distinguishDifficult to distinguish finelyLaser detailsResonant cavityPlane mirror
The invention relates to a combined interference chamber for chemical laser device wavelength choice output. A stable chamber structure is adopted in the combined interference chamber which comprisesa recessed surface reflecting mirror, a 45 degree beam splitting sheet and two plane reflecting mirrors. The 45 degree beam splitting sheet and the two plane reflecting mirrors form an interference sub-chamber, and reflecting films having different reflectivity for laser light with different wavelengths are respectively plated on reflecting planes of the recessed surface reflector and the plane reflecting mirrors. Via control over reflectivity parameters of optical elements in a laser resonant cavity, wavelengths of a laser device can be chosen roughly; interference effects are used for closely adjacent wavelengths can be chosen in a careful way via adjustment of parameters such as a length of the interference sub-chamber, a beam splitting ratio of a beam splitting sheet and the like; thelaser device is enabled to output laser light with any single wavelength.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Fiber laser adopting end face coated cavity mirror
InactiveCN101752775BNot easy to damageNot easy to vibrateOptical resonator shape and constructionActive medium shape and constructionOptical propertyOptoelectronics
The invention relates to a fiber laser adopting an end face coated cavity mirror. The fiber laser is characterized by comprising the coated cavity mirror, a pumping device and a doped fiber serving as a gain medium, wherein the coated cavity mirror is a fiber end face thin film with a certain optical characteristic which is formed by coating a film on the end face of a small section of fiber; andthe small section of fiber is a section of gain fiber or a section of undoped fiber which has the same parameter as the gain fiber. The end face coating film is adopted by the fiber laser as a cavitymirror, so that the service life and the damage threshold of the cavity mirror are improved; and consequently, the cavity mirror cannot be ablated or damaged when working at a higher power.
Owner:WUXI RES INST OF APPLIED TECH TSINGHUA UNIV +1
Filtering endoscope used for optical fiber laser and optical fiber laser
InactiveCN101783477BDoes not affect oscillationHigh damage resistance thresholdOptical resonator shape and constructionActive medium shape and constructionLight beamErbium lasers
The invention relates to a filtering endoscope used for an optical fiber laser and the optical fiber laser, which belongs to the technical field of endoscopes and is characterized in that the filtering endoscope used by an optical fiber laser is formed by coaxially connecting optical fibers plated with thin layers with different optical properties and doped optical fibers serving as gain media. The optical fiber laser comprises a filtering endoscope and a pumping device for injecting pump light into gain optical fibers. Since the used filtering endoscope is formed by plating the film on an end surface, and the anti-damage threshold of the filtering endoscope is higher, the laser can work under high power; since the filtering endoscope comprises filtering optical fibers the structural parameters of which are different from those of the gain optical fibers, high-order mode loss is increased in laser oscillation and transmission, and the quality of output light beams is improved.
Owner:TSINGHUA UNIV
W-shaped axial cone mirror used for angle direction polarization selection
ActiveCN106066506AImprove reflectivityIncrease lossPolarising elementsGeometric relationsThermal stability
The invention discloses a W-shaped axial cone mirror used for angle direction polarization selection. A reflection face of the W-shaped axial cone mirror consists of an outer conical surface positioned at a central area and an inner conical surface positioned at a peripheral area, the inner conical surface and the outer conical surface form a reflecting structure having a hollow inner part, and a half cone angle alpha of the outer conical surface and a half cone angle beta of the inner conical surface satisfy the following geometric relation expression: 2alpha+beta=90 degrees, 0 degree<alpha<45 degrees. The W-shaped axial cone mirror is characterized by simple structure, good symmetry, strong anti-imbalance ability, excellent thermal stability and mechanical property, easy-to-manufacture property and low cost; the W-shaped axial cone mirror can be widely used in gas, solid and semiconductor lasers to generate high power and high purity angle direction polarized light.
Owner:HUAZHONG UNIV OF SCI & TECH
High-power laser multipath optical fiber sampling time waveform measuring device
ActiveCN101782436BReduce distractionsGuaranteed coupling transmission efficiencyInstrumentsPhotovoltaic detectorsHigh power lasers
Owner:SHANGHAI LASER POWER EQUIP CO LTD
A kind of preparation method of gtr-ktp crystal
ActiveCN103451731BAvoid pollutionImprove stabilityPolycrystalline material growthBy pulling from meltGreen-lightCrystal
The invention relates to a preparation method of gray track resistance KTiOPO (GTR-KTP) crystals. The method comprises the following steps: firstly preparing a KH2PO4 crystal material, and then carrying out sectional heating to form an even and stable high-temperature solution under a super environment; adopting a method of combining the top end with lifting to grow the GTR-KTP crystals. According to the KTP crystals prepared by the preparation method, an absorption coefficient of the KTP crystals is reduced; a gray track can be effectively prevented, so that the frequency doubling conversion efficiency of the KTP crystals is obviously enhanced; the GTR-KTP crystals are irradiated by a 100mw and 532nm of green light within 1000 seconds in a test; absorption of the system is basically kept stable; a good gray track resistant effect is displayed.
Owner:INNOWIT
A w-shaped axicon for angular polarization selection
The invention discloses a W-shaped axial cone mirror used for angle direction polarization selection. A reflection face of the W-shaped axial cone mirror consists of an outer conical surface positioned at a central area and an inner conical surface positioned at a peripheral area, the inner conical surface and the outer conical surface form a reflecting structure having a hollow inner part, and a half cone angle alpha of the outer conical surface and a half cone angle beta of the inner conical surface satisfy the following geometric relation expression: 2alpha+beta=90 degrees, 0 degree<alpha<45 degrees. The W-shaped axial cone mirror is characterized by simple structure, good symmetry, strong anti-imbalance ability, excellent thermal stability and mechanical property, easy-to-manufacture property and low cost; the W-shaped axial cone mirror can be widely used in gas, solid and semiconductor lasers to generate high power and high purity angle direction polarized light.
Owner:HUAZHONG UNIV OF SCI & TECH
A Laser Array Light Source Based on Liquid Crystal Geometric Phase Modulation
ActiveCN111668693BEfficient conversionHigh resolutionLaser detailsPolarising elementsGratingGaussian beam
The invention discloses a laser array light source based on liquid crystal geometric phase modulation. Based on the geometric phase modulation principle of liquid crystal molecules, a geometric phasearray grating is designed by controlling the arrangement direction of a main shaft of the liquid crystal molecules. The grating is insensitive to the polarization state of an incident light beam, and0-pi binary geometric phase modulation can be introduced to a fundamental mode Gaussian beam in any polarization state, so that the fundamental mode Gaussian beam is converted into a high-dimensionallaser beam array. According to the laser array light source, optical elements such as the geometric phase array grating are integrally fixed through the metal sleeve, the overall structure is compact,and good stability is achieved. The light source is reliable in structure and easy to control, can serve as a novel array structure light source to be widely applied to the frontier application fields of laser array radars, face recognition, multi-point machining, microimaging and the like, and has great progress compared with the prior art.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Digital optical pulse generation device using piezoelectric ceramics feedback control
InactiveCN107093838AOvercome the disadvantage of poor output stabilityUltrashort light pulse stabilizationActive medium shape and constructionMicrocontrollerMode locked fiber laser
The invention discloses a digital optical pulse generation device using piezoelectric ceramics feedback control and belongs to the optical communication device technology field. A main structure comprises an active mode-locking fiber laser resonant cavity formed by a pump light source (1), a wavelength division multiplexer (2), a first optical coupler (3), a first polarization controller (4) and the like, a passive mode-locking fiber laser system formed by a dispersion compensation fiber (25), a graphene saturable absorber (27) and other devices, and a pulse optimization system formed by two automatic feedback control loops. In the invention, a main and passive mixing mode locking technology is adopted; an optical detector receiving portion is used to output laser and a single-chip microcomputer is used to process a received signal; piezoelectric ceramics is controlled to realize optimization of a whole-system output pulse; and finally, the whole system generates a stable ultra-short high speed light pulse, operation is simple and accurate control can be reached.
Owner:JILIN UNIV
A kind of composite thin film and its preparation method and self-starting mode-locked fiber laser device
ActiveCN110994346BHigh damage resistance thresholdEasy to operatePolycrystalline material growthFrom normal temperature solutionsComposite filmPyrrolidinones
The application belongs to the technical field of fiber lasers, and in particular relates to a composite thin film, a preparation method thereof, and a self-starting mode-locked fiber laser device. Because the gain fiber doped with rare earth atoms is expensive, the cost of the fiber laser is also very high. At the same time, the long gain fiber will lead to extremely obvious Kelly sidebands of the mode-locked pulse, which will eventually cause the interaction between soliton pulses, resulting in The timing jitter of pulses aggravates the bit error rate of long-distance communication, which is not conducive to the improvement of communication quality. The application provides a composite film, which is composed of the following raw materials in parts by weight: 3-11 parts of polyvinylpyrrolidone, 16-24 parts of ethylene glycol, 76-84 parts of sodium hydroxide, 2-2 parts of bismuth chloride 10 parts, 1 to 9 parts of antimony chloride and 11 to 19 parts of sodium tellurite. It has weak Kelly sidebands, high damage resistance threshold, can realize self-starting mode locking, easy to operate, narrow pulse, and good stability.
Owner:CHANGCHUN UNIV OF SCI & TECH
A Wavelength Selective Output Folded Unstable Cavity for Hydrogen Fluoride Laser
The invention relates to a hydrogen fluoride laser wavelength selective output folded unstable cavity. The resonant cavity includes a convex reflector, a 45-degree polarized reflector, a 45-degree total reflector and a concave reflector. Among them, the reflective surfaces of the convex reflector and the concave reflector are respectively coated with a reflective film with high transmission of short wavelength light and high reflection of long wavelength light. Reflective film with high reflection of wavelength light. The selective output of laser light with different wavelengths is realized by utilizing the different reflectivity of the optical elements in the cavity to the oscillating light of different wavelengths in the cavity. By setting the position of the optical element in the cavity, the beam rotation of the resonant light in the cavity along the airflow direction is respectively realized, and the spatial distribution uniformity of the output light spot is improved. The resonant cavity has a simple structure and can realize uniform output of a hydrogen fluoride laser single spectral line.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
High-stability optical pulse generator
InactiveCN107039877AOvercoming frequencyOvercome stabilityActive medium shape and constructionMode locked fiber laserMicrocontroller
The invention relates to a high-stability optical pulse generator and belongs to the technical field of optical communication devices. The high-stability optical pulse generator mainly comprises an active mode locking optical fiber laser resonant cavity composed of components of a pump light source (1), a wavelength division multiplexer (2), a first optical coupler (3) and a polarization controller (4), a passive mode locking optical fiber laser system composed of components of a dispersion compensation optical fiber (23) and a graphene saturable absorber (24) as well as a pulse optimization system composed of two automatic feedback control loops. The high-stability optical pulse generator provided by the invention has the advantages that an active and passive mixed mode locking technology is adopted, a receiving part of an optical detector is utilized for outputting lasers, a singlechip and an amplifying circuit are utilized for processing a received signal, a piezoelectric ceramic is controlled to realize optimization of an output pulse of the whole system, finally the whole system produces a stable ultrashort high-speed optical pulse, operation is simple, and accurate control can be achieved.
Owner:JILIN UNIV
External cavity feedback type all-fiber structure cavity emptying laser
PendingCN114256725AAchieve gain amplificationLaser Spectrum OptimizationActive medium shape and constructionGratingGain
The invention discloses an external cavity feedback type all-fiber structure cavity emptying laser, which comprises a pump laser, the pump laser is connected with a second port of a polarization-maintaining wavelength division multiplexer, and a third port of the polarization-maintaining wavelength division multiplexer, a polarization-maintaining gain fiber and a first fiber grating are connected in sequence; a port 1 of the polarization-maintaining wavelength division multiplexer, the polarization beam splitter, the 1 / 4 wave plate, the polarization modulator, the second fiber bragg grating and the third fiber bragg grating are connected in sequence; a MgO: LiNO3 crystal is packaged in the polarization modulator; the first fiber bragg grating and the second fiber bragg grating form a resonant cavity, and the first fiber bragg grating and the third fiber bragg grating form a feedback outer cavity. The cavity emptying technology, the feedback type outer cavity, the optical fiber laser and the MgO: LiNO3 doped crystal are fused together, laser pulse output is achieved based on polarization control adjustment, and the laser has the advantages of being compact in structure, high in reliability, high in polarization extinction ratio and good in light beam quality.
Owner:湖北久之洋信息科技有限公司
A laser capable of outputting single longitudinal mode laser beam and its light output control method
ActiveCN108767639BEnergy amplification is easySharp transmittanceLaser detailsPhotoswitchFluorescence
Owner:JILIN PROVINCE KING LASER CO LTD
A Solid Laser Resonator Resistant to Laser Damage
ActiveCN109167240BHigh damage resistance thresholdAvoid platingPrismsOptical resonator shape and constructionResonant cavitySpecial design
The invention relates to a laser damage resistant solid-state laser resonator, comprising a first total reflection prism (1), a laser gain medium (2), a coupling output prism (3), and a second total reflection prism (4). In order to solve the problem that the reliability of laser is not high due to the damage of optical element film, The invention adopts all optical elements which are not coated as resonant cavity elements, realizes high transmission, high reflection and specific proportion transmission of laser light through special design material and incident angle, thereby realizing oscillation output of laser light, so that laser damage threshold of laser light can be greatly increased, and laser reliability can be further improved.
Owner:BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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