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31results about How to "Large emission cross section" patented technology
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Chrome iron ion double-doped complex selenium zinc sulfide laser material and preparation method thereof
ActiveCN103275723AAchieve deliveryBroad Laser SpectrumLuminescent compositionsMiddle infraredHigh peak
The invention discloses a chrome iron ion double-doped complex selenium zinc sulfide laser material and a preparation method thereof. The molecular formula of the chrome iron ion double-doped complex selenium zinc sulfide laser material is Cr, Fe:ZnSxSe1-x, wherein x is not less than 0 and not more than 1. For the Cr and Fe transition metal ion energy band, the bandwidth is in a middle infrared wavelength range, the absorption and emission bandwidths are wide, the absorption and emission section areas are large, and ultrashort and ultrafast laser output with high peak power can be obtained. The Cr, Fe: ZnSSe laser material with excellent laser optical property can be subjected to LD (Laser Diode) direct pumping to manufacture an ultrafast laser device with low threshold, thus, the laser device is promoted to be more succinct and more miniature.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Full solid violet and red laser device used for photodynamic therapeutics
InactiveCN1618481ASimple structureEasy to adjustOptical resonator shape and constructionActive medium materialSemiconductor laser theoryLight source
A full-solid violet-red laser device for photodynamic therapy features that a semiconductor laser device is used as pumping light source, the reflection reducing film is plated no the front and back surfaces of Nd doped crystal, the laser resonant cavity is composed of input lens and two cavity mirrors, an acoustooptical modulator is arranged in said cavity, and a PPLN crystal is arranged in a temp controlled furnace outside the cavity.
Owner:SHANDONG NORMAL UNIV
Tunable laser crystal chrome-mixing magnesium molybdate and preparation method thereof
InactiveCN102534792ARaw materials are easy to getModerate mechanical propertiesPolycrystalline material growthFrom melt solutionsSpace groupFluorescence
The invention provides a tunable laser crystal chrome-mixing magnesium molybdate and a preparation method thereof. A fused salt top-seeded method is adopted, 55-80at.%K2Mo2O7 serves as a fluxing agent, growth parameters include that cooling speed is 0.5-5 DEG C / day, growth temperature is 700-880 DEG C, rotation speed is 5-30 turns / minute, and high quality big-sized Cr 3+: MgMoO4 crystal is grown. The crystal belongs to a monoclinic system and has a C2 / m space group structure, and a=10.273, b=9.288, c=7.025, beta=106.96 degrees, z=8, V=641.14, and Dc=3.82 g / cm3. The crystal has the advantages of being moderate in mechanical performance, wide in tunable laser wave band, big in emission section, short in fluorescence service life and the like and is a good tunable laser crystal material.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Transition-metal-doped zinc sulfide or zinc selenide planar waveguide material and preparation method
ActiveCN104441849ALower pumping thresholdImprove cooling effectCeramic layered productsZinc selenideHigh power lasers
The invention relates to a transition-metal-doped zinc sulfide or zinc selenide planar waveguide material and a preparation method. The transition-metal-doped zinc sulfide or zinc selenide planar waveguide material is characterized in that a YAG (yttrium aluminum garnet) or Al2O3 lath is respectively combined to two sides of transition-metal-ion-doped zinc sulfide or zinc selenide ceramic to form a sandwich planar waveguide structure, so that a heat-mirror effect of laser can be effectively controlled, and the intermediate infrared waveguide laser output is realized. By adopting the transition-metal-doped zinc sulfide or zinc selenide planar waveguide material, not only can the heat management be effectively realized by virtue of the sandwich composite structure, but also the mass production can be realized, and important significance on the development of a high-power laser technology and integrated optics can be realized.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Barium tungstate crystal all-solid-state continuous Raman laser
InactiveCN101527425AStart fastHigh beam qualityLaser using scattering effectsOptical resonator shape and constructionResonant cavityAll solid state
The invention relates to a barium tungstate crystal all-solid-state continuous Raman laser. A barium tungstate crystal is used as a Raman medium to be placed into a laser resonant cavity and performs intracavity Raman conversion on,fundamental light produced by a laser gain medium so as to obtain Raman laser output with 1180 nm continuous running. The laser gain medium is an Nd: YVO4 crystal or other laser crystals mixed with Nd<3+>, Yb<3+> and Pr<3+>. The invention has simple and compact structure, overcomes the adverse effects of high Raman threshold values and serious thermal effect in a continuous running mode, obtains high beam quality, achieves the continuous Raman laser output of low threshold values and high power, efficiency and stability, has high application value in the fields of medical treatment, weather, maritime affairs, military affairs, aviation, scientific research, and the like, and obtains the continuous Raman laser output with different wavelengths by selecting different laser gain media for performing frequency transformation on different fundamental waves.
Owner:NANJING UNIV
Separation type Raman laser in full solid state
InactiveCN1761111AOvercome adverse effectsOvercome constraintsOptical resonator shape and constructionActive medium materialSingle crystalFrequency shift
The Raman laser with simple compact structure includes pump system of diode laser end face, laser cavity composed of coated laser input / output cavity mirrors, independent laser gain crystal placed in laser cavity, Raman frequency shift crystal and turning Q unit for laser. Output Raman laser is obtained from laser in quasi continuous operation. Laser gain crystal is Nd:YVO4 crystal, doping Nd3+ laser crystal or doping Yb3+:YAG etc. laser crystals, which generate laser oscillations with wavelengths near to 1.34 micro or 1.06 micro. Raman frequency shift crystal is prepared from one piece of single crystal as Raman active medium. Here, the Raman frequency shift crystal is undoped YVO4 crystal etc. in the invention, laser gain crystal and Raman frequency shift crystal are independent from each other so as to raise output power and beam quality of laser since heat effect does not occur.
Owner:NANJING UNIV
Transition metal ion concentration gradient doped zinc sulfide or zinc selenide and preparation method thereof
InactiveCN103897692AImprove cooling effectMeet Laser TechnologyLuminescent compositionsZinc selenidePhysical chemistry
The invention discloses a transition metal ion concentration gradient doped zinc sulfide / zinc selenide and a preparation method thereof. The active ion of the laser material is one or more of transition metal ions Tm<2+>, Cr<2+>, Co<2+> and Fe<2+>, and the doping concentration of the transition metal ions on two end surfaces of the laser material is in exponential distribution from high to low and is 10<16>-10<20> ions / cm<3>. The material has the characteristics of wide absorption and emission bandwidth and large absorption and emission section, and can obtain ultra-short and ultra-fast laser output with high peak power. One end of the laser material with large doping concentration is attached to a heat sink, so that heat energy generated when incident light enters the laser gain material can be quickly taken away, thus the heat effect produced by laser is reduced, and efficient laser output is achieved.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Yb, Gd co-doped barium fluoride crystal and preparation method thereof
InactiveCN101864596ALong Upper Level LifetimeHigh thermal conductivityPolycrystalline material growthFrom frozen solutionsUltrashort pulse laserIon
The invention discloses an Yb, Gd co-doped barium fluoride crystal and a preparation method thereof. The molecular formula of the crystal is YbxGdyBaF2+3x+3y, wherein x is the doping density of Yb3+ and is equal to 1-10mol percent; and y is the doping density of Gd3+, and is equal to 10-30mol percent. The crystal is grown by a melt method. The crystal has large absorption and emission section, long fluorescence lifetime and high heat conductivity, is a laser gain material for high-efficiency, high-frequency and high-power lasers, and can be used for laser diode pumped high-frequency, high-power tunable or ultrashort-pulse lasers.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Yb and Er -codoped gadolinium silicate laser crystal and preparation method therefor
InactiveCN1865538APromote growthImprove energy transferPolycrystalline material growthSingle crystal growth detailsFluorescenceGadolinium
The invention discloses an ytterbium-erbium doping gadolinium silicate crystal and preparing method, which is characterized by the following: the laser single-crystal structure formula is Ybx, Ery:Gd2SiO5, wherein x is 0.01-0.5; y is 0.001-0.15; the crystal adopts flux method growth; the Yb,Er:Gd2SiO5 crystal possesses high-sound acoustic phonon energy (1000cm-1) with large crystal field splitting, 0.86*10-20cm-1 transmitting cross-section of 1.55 mum band and 7ms fluorescent lifetime, which improves Er3+ luminous efficiency.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Dysprosium doped lead fluoride crystal and preparation method thereof
InactiveCN102051682ALow phonon energyShort fluorescence lifetimePolycrystalline material growthFrom frozen solutionsFluorescenceLead fluoride
The invention relates to a dysprosium doped lead fluoride crystal which has a molecular formula of DyxPbF2+3x, wherein x is the doping concentration of Dy<3+> and is equal to 0.1-10 mol percent. The crystal grows by adopting a melt method. A preparation method of the dysprosium doped lead fluoride crystal comprises the following steps of: 1, selecting the value of x, weighting the initial raw materials of DyF3 and PbF2 in a crystal growing formula according to the molecular formula of the DyxPbF2+3x in accordance with the stoichiometric proportion, wherein x=0.1-10 mol percent; and 2, uniformly mixing the weighted raw materials in the proportion, drying in vacuum and pressing into blocks, placing a graphite or platinum crucible, with a PbF2 crystal as a seed crystal, growing gases of atmosphere of argon or CF4 and the like. The dysprosium doped lead fluoride crystal has lower phonon energy, longer fluorescence lifetime and larger absorbing and transmitting section, and is possible to apply to an all-solid laser of 2-5mum waveband.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Thulium doped lead fluoride crystal and preparation method thereof
InactiveCN101935874ALong fluorescence lifetimeLarge emission cross sectionPolycrystalline material growthFrom frozen solutionsFluorescenceThulium
The invention relates to a thulium doped lead fluoride crystal. The molecular formula of the crystal is TmxPbF2+3x, wherein x is the dosage concentration of Tm3+ and is 0.1-10mol percent. A melt method is used for the growth of the crystal and comprises the following steps of: (1) selecting the value of x, and weighing raw materials by a stoichiometric ratio according to the molecular formula TmxPbF2+3x, wherein initial raw materials for the crystal growth comprise TmF3 and PbF2, and x is 0.1-10mol percent; (2) sufficiently and uniformly mixing the raw materials weighed by the ratio, drying in vacuum and pressing into blocks; and putting the blocks into a graphite crucible or a platinum crucible by using a PbF2 crystal as a seed crystal with a growth atmosphere of argon or CF4 gas. The crystal has the advantages of long fluorescence lifetime of 10ms and larger absorption and emission cross section and is expected to be applied to lasers within a wave band of 2mum of all-solid laser diode pumping.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Optical fiber raw material composition, optical fiber, and optical fiber product
PendingCN114447743ALarge emission cross sectionStrong deliquescence resistanceGlass making apparatusCladded optical fibreOptical fiber amplifiersMid infrared
The invention discloses an optical fiber raw material composition, an optical fiber and an optical fiber product, and belongs to the technical field of communication. The optical fiber raw material composition comprises the following components in percentage by mole: 10%-50% of AlF3, 3%-20% of BaF2, 3%-20% of CaF2, 1%-15% of YF3, 3%-20% of SrF2, 3%-20% of MgF2 and 1%-35% of TeO2. The optical fiber raw material composition not only can be used for preparing an optical fiber cladding, but also can cooperate with erbium ions to prepare an erbium-doped optical fiber core, so that the prepared optical fiber is wide in emission cross section and high in deliquescence resistance, and low-loss welding with a silica optical fiber can be realized. The optical fiber prepared from the optical fiber raw material composition provided by the invention can be used in the aspects of middle-infrared band transmission optical fibers, optical fiber amplifiers, optical fiber lasers, optical fiber sensors and the like.
Owner:HUAWEI TECH CO LTD
Tunable laser crystal chrome-doped sodium magnesium molybdate and preparation method thereof
InactiveCN103898609AModerate mechanical propertiesWide tunable laser bandPolycrystalline material growthFrom melt solutionsSpace groupMolybdate
The invention provides tunable laser crystal chrome-doped sodium magnesium molybdate and a preparation method thereof. A molten salt top seed crystal method is adopted, 55-80at.% of Na2Mo2O7 is used as a melting assistant, and the growth parameters are as follows: the cooling velocity is 0.5-3 DEG C / day, the growth temperature is 800-880 DEG C, the rotation speed is 5-30rpm / minute, and a Cr<3+>:Na2Mg5(MoO4)6 crystal which is relatively good in quality and relatively large in size is grown, wherein the doping concentration of Cr<3+> is 0.2-5at.%. The crystal belongs to a triclinic system, and has a P-1 space group structure as shown in the specification. The crystal has the characteristics that the mechanical property is moderate, the tunable laser wave band is wide, the emission cross section is large, and the like, and is a relatively good tunable laser crystal material.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Ytterbium-calcium-niobium mixed garnet crystal and laser device
InactiveCN1924118ALarge emission cross sectionLong upper energy lifePolycrystalline material growthOptical resonator shape and constructionYb elementOptoelectronics
Owner:SHANDONG UNIV
Separation type Raman laser in full solid state
InactiveCN100365887COvercome adverse effectsOvercome constraintsOptical resonator shape and constructionActive medium materialSingle crystalFrequency shift
The Raman laser with simple compact structure includes pump system of diode laser end face, laser cavity composed of coated laser input / output cavity mirrors, independent laser gain crystal placed in laser cavity, Raman frequency shift crystal and turning Q unit for laser. Output Raman laser is obtained from laser in quasi continuous operation. Laser gain crystal is Nd:YVO4 crystal, doping Nd3+ laser crystal or doping Yb3+:YAG etc. laser crystals, which generate laser oscillations with wavelengths near to 1.34 micro or 1.06 micro. Raman frequency shift crystal is prepared from one piece of single crystal as Raman active medium. Here, the Raman frequency shift crystal is undoped YVO4 crystal etc. in the invention, laser gain crystal and Raman frequency shift crystal are independent from each other so as to raise output power and beam quality of laser since heat effect does not occur.
Owner:NANJING UNIV
Thulium doped lead fluoride crystal and preparation method thereof
InactiveCN101935874BLong fluorescence lifetimeLarge emission cross sectionPolycrystalline material growthFrom frozen solutionsFluorescenceThulium
The invention relates to a thulium doped lead fluoride crystal. The molecular formula of the crystal is TmxPbF2+3x, wherein x is the dosage concentration of Tm3+ and is 0.1-10mol percent. A melt method is used for the growth of the crystal and comprises the following steps of: (1) selecting the value of x, and weighing raw materials by a stoichiometric ratio according to the molecular formula TmxPbF2+3x, wherein initial raw materials for the crystal growth comprise TmF3 and PbF2, and x is 0.1-10mol percent; (2) sufficiently and uniformly mixing the raw materials weighed by the ratio, drying in vacuum and pressing into blocks; and putting the blocks into a graphite crucible or a platinum crucible by using a PbF2 crystal as a seed crystal with a growth atmosphere of argon or CF4 gas. The crystal has the advantages of long fluorescence lifetime of 10ms and larger absorption and emission cross section and is expected to be applied to lasers within a wave band of 2mum of all-solid laser diode pumping.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Neodymium-doped lanthanum strontium aluminate tantalate laser crystal and process for preparing the same
InactiveCN1737218AWide absorption bandwidthAbsorbentPolycrystalline material growthBy pulling from meltIntermediate frequencyStructural formula
Disclosed is a neodymium-doped lanthanum strontium aluminate tantalate laser crystal and process for preparation, wherein the crystal has a structural formula of (NdxLa(0.3-x)Sr0.7)(Al0.65Ta0.35)O3, wherein the value range of x is between 0.1-10 at%, the preparation method of the crystal comprises the following steps: (1) weighing raw materials of La2O3, SrCO3, Al2O3, Ta205 and Nd203 according to the molecular formula and chemical measurement, (2) mixing the raw material homogeneously, tabletting and placing aluminium oxide crucible into a Muffle furnace, sintering more than ten hours at 1200 deg C, (3) loading the sintered Nd:(La,Sr)(Al,Ta)O3 into a iraurite crucible, using (La,Sr)(Al,Ta)O3 single crystal as seed crystal, growing with intermediate frequency induction Czochralski method in inert gas atmosphere.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Transparent vanadate glass and method for making same
InactiveCN1569705AGood light transmissionHigh absorption coefficientAlkaline earth metalAlkali metal oxide
The invention discloses a transparent vanadate glass and method for making same, wherein the glass is based on the conventional vanadate glass V2O5-SiO2, adding alkali metal oxide N2O+K2O+Cs2O and alkali metal hydrate CaO+BaO+SrO. The glass is prepared in environment where oxygen purity is above 99%.
Owner:FUDAN UNIV
Chromium-doped lithium magnesium tungstate crystal and its preparation and application
ActiveCN103668459BModerate mechanical properties and thermal propertiesWide tunable laser bandPolycrystalline material growthFrom frozen solutionsChromium dopingConcentration ratio
The invention discloses a chromium-doped lithium tungstate magnesium crystal as well as a preparation method and an application thereof. The molecular formula of the crystal is Cr3+:Li2Mg2(WO4)3, the crystal belongs to an orthorhombic crystal system and a Pnma space group, and the cell parameter is as follows: Z=4. The crystal grows in a top seeded solvent growth method, the mixture of 75% Li2WO4 and 25% WO3 is used as a fluxing agent, the concentration ratio of the fluxing agent in the growth raw material is 55 to 80 percent, and the growth parameters are as follows: the cooling rate is 0.5 to 5 DEG C / day, the growth temperature is 800 to 880 DEG C, and the rotation speed is 5 to 30 turns / min. The crystal has the characteristics such as moderate mechanical performance, large transmission cross section and the like, the tunable range is 750nm to 1050nm, and the crystal is expected to become a novel tunable laser crystal and can be actually used.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Nd-doped lanthanum calcium oxygen borate laser crystal, method for making same and use thereof
InactiveCN100385754CLarge emission cross sectionLarge allowable angleBy pulling from meltActive medium materialSpace groupCzochralski method
The invention is an lanthanum oxygen-calcium neodymium borate-doping laser crystal and its making method as well as its application, relating to the artificial crystal field. It belongs to a monoclinic system, space group is Cm, cell parameters are an equal to 8.1732 angstrom, b equal to 16.0860 angstrom, c equal to 3.6268 angstrom, beta equal to 101.40 deg., Z equal to 2, V equal to 467.4229 cu angstrom, and refractive index equal to 1.72. It adopts pull method (Czochralski method) to grow a high-quality, large-size lanthanum oxygen- calcium neodymium borate (Nd3plus : LaCa4O(BO3)3)-doping crystal at a crystal speed of 5-30 r / m and at a pull rate of 0.5-2mm / hr under 1410 deg.C. It is a new type laser crystal and has a nonlinear optical performance at the same time.
Owner:FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
Transparent vanadate glass and method for making same
InactiveCN1245344CGood light transmissionHigh absorption coefficientAlkaline earth metalAlkali metal oxide
Owner:FUDAN UNIV
Transparent oxyfluoride tellurite glass
InactiveCN102515528BLow maximum phonon energyLower melting temperatureUpconversion luminescenceRare earth
The invention relates to a transparent oxyfluoride tellurite glass, which comprises the following components by mole ratio: 55-75mol% of TeO2, 5-25mol% of Al2O3, 0-18mol% of CaF2, 0-15mol% of LaF3. The oxyfluoride tellurite glass uses a traditional glass melting process for melting and molding. The oxyfluoride tellurite glass possesses excellent thermal stability, and is an ideal rare earth doped up-conversion luminescence matrix material which is capable of enhancing the permeability of the matrix, improving the treatment load of a land infiltration system and improving the denitrification efficiency, the oxyfluoride tellurite glass does not contain toxic heavy metals Pb and Cd elements which are harmful to human body and environment.
Owner:SHENYANG UNIV
Transition metal doped zinc sulfide or zinc selenide planar waveguide material and preparation method
ActiveCN104441849BLower pumping thresholdImprove cooling effectCeramic layered productsZinc selenideHigh power lasers
The invention relates to a transition-metal-doped zinc sulfide or zinc selenide planar waveguide material and a preparation method. The transition-metal-doped zinc sulfide or zinc selenide planar waveguide material is characterized in that a YAG (yttrium aluminum garnet) or Al2O3 lath is respectively combined to two sides of transition-metal-ion-doped zinc sulfide or zinc selenide ceramic to form a sandwich planar waveguide structure, so that a heat-mirror effect of laser can be effectively controlled, and the intermediate infrared waveguide laser output is realized. By adopting the transition-metal-doped zinc sulfide or zinc selenide planar waveguide material, not only can the heat management be effectively realized by virtue of the sandwich composite structure, but also the mass production can be realized, and important significance on the development of a high-power laser technology and integrated optics can be realized.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Dysprosium doped calcium strontium molybdate green laser crystal and preparation method thereof
InactiveCN106058631BGood physical and chemical propertiesModerate machinabilityPolycrystalline material growthFrom melt solutionsGrowth parameterGreen-light
Owner:SHANGHAI INST OF TECH
Method for setting super crystalline lattice all solid state red-yellow-green-blue four-color laser
InactiveCN1226814CImprove efficiencySimple structureOptical resonator shape and constructionActive medium materialTemperature controlAll solid state
Superlattice solid red, yellow, green and blue laser is to pump Nd: YVO4 crystals with LD, and 1.064 um and 1.342 laser oscillate simultane-ously in the way of cavity of shunt fold to output in collineation (eg. 1.342 um laser oscillates between 3-6, 1.064 um between 3-7). An non-periodic LiTaO3 superlattice capable of realizing laser frequency multiplications 1.064 um (green), 1.342um (red) and frequency-triple (blue) and sum frequency of the two laser (yellow) is put in a temperature controlled over in or out a cavity to get red, yellow green and blue to output simultaneously.
Owner:NANJING UNIV
Neodymium-doped lanthanum strontium aluminate tantalate laser crystal and process for preparing the same
InactiveCN100340703CWide absorption bandwidthLarge emission cross sectionPolycrystalline material growthBy pulling from meltCzochralski methodCrucible
Disclosed is a neodymium-doped lanthanum strontium aluminate tantalate laser crystal and process for preparation, wherein the crystal has a structural formula of (NdxLa(0.3-x)Sr0.7)(Al0.65Ta0.35)O3, wherein the value range of x is between 0.1-10 at%, the preparation method of the crystal comprises the following steps: (1) weighing raw materials of La2O3, SrCO3, Al2O3, Ta205 and Nd203 according to the molecular formula and chemical measurement, (2) mixing the raw material homogeneously, tabletting and placing aluminium oxide crucible into a Muffle furnace, sintering more than ten hours at 1200 deg C, (3) loading the sintered Nd:(La,Sr)(Al,Ta)O3 into a iraurite crucible, using (La,Sr)(Al,Ta)O3 single crystal as seed crystal, growing with intermediate frequency induction Czochralski method in inert gas atmosphere.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Lead fluoride crystal co-doped with ytterbium and alkaline and preparation method thereof
InactiveCN101580272BHigh thermal conductivityLow phonon energyPolycrystalline material growthLead halidesFluorescenceStructural formula
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Chromium-iron ion double-doped compound selenium zinc sulfide laser material and preparation method thereof
ActiveCN103275723BAchieve deliveryBroad Laser SpectrumLuminescent compositionsMiddle infraredOptical property
The invention discloses a chrome iron ion double-doped complex selenium zinc sulfide laser material and a preparation method thereof. The molecular formula of the chrome iron ion double-doped complex selenium zinc sulfide laser material is Cr, Fe:ZnSxSe1-x, wherein x is not less than 0 and not more than 1. For the Cr and Fe transition metal ion energy band, the bandwidth is in a middle infrared wavelength range, the absorption and emission bandwidths are wide, the absorption and emission section areas are large, and ultrashort and ultrafast laser output with high peak power can be obtained. The Cr, Fe: ZnSSe laser material with excellent laser optical property can be subjected to LD (Laser Diode) direct pumping to manufacture an ultrafast laser device with low threshold, thus, the laser device is promoted to be more succinct and more miniature.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Dysprosium-doped strontium calcium molybdate green laser crystal and preparation method thereof
InactiveCN106058631AImprove conversion efficiencyGood physical and chemical propertiesPolycrystalline material growthFrom melt solutionsSpace groupGrowth parameter
The invention discloses a dysprosium-doped strontium calcium molybdate green laser crystal. The molecular formula for the crystal is Dy<3+>:Sr2CaMoO6, which belongs to an orthorhombic system and a Pmm2 space group, crystal cell parameters are alpha=beta=gamma=90 DEG, a=8.1513 angstrom, b=5.7416 angstrom, c=5.8385 angstrom and Z=2. The invention also provides a method of preparing the above dysprosium-doped strontium calcium molybdate green laser crystal. A molten salt top-seeded solution growth method is adopted; K2Mo2O7-MoO3 serves as a fluxing agent; the growth parameters are: a cooling rate of 0.5 to 3 DEG C per day, growth temperature of 750 to 790 DEG C, and a rotation speed of 5 to 30 revolutions per minute; the Dy<3+>:Sr2CaMoO6 crystal grows; and the doping concentration of Dy<3+> is 1at.% to 15at.%. The crystal of the invention can be used as a laser working material in a solid-state laser, a flash or a laser diode is used as a pumping source, and green laser is excited and generated and outputted.
Owner:SHANGHAI INST OF TECH
Lead silicate glass used in double-clad optical fiber, and double-clad optical fiber preparation method
InactiveCN104402236AIncrease the doping concentrationShort cycleGlass making apparatusGlass fibre productsFiber2 μm laser
The invention relates to lead silicate glass used in double-clad optical fiber, and a double-clad optical fiber preparation method. According to the invention, fiber core, inner clad and outer clad glass are prepared with a melting method; an optical fiber preform is prepared with a stacking method; and drawing is carried out, such that double-clad lead silicate glass optical fiber is obtained. As a result of laser experiment upon the drawn double-clad optical fiber, ~2mum laser output is realized under 793nmLD pump.
Owner:SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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