46results about How to "Large nonlinear optical effect" patented technology

The present invention provides red and green borate fluorophor and its preparation process. The fluorophor is RE ion activated sodium lanthanum borate in the chemical expression of Na3La9(1-x)B8O27:Ln9x3+, where, Ln is Eu or Tb, x is 0-0.4. It is prepared through one high temperature solid phase synthesis process or one sol-gel process, and has Eu3+ or Tb3+ doped into the matrix Na3La9B8O27. It has stable physical and chemical properties, low cost, simple preparation process and other advantages. It has very high light emitting efficiency under the excitation of 254 nm or 365 nm ultraviolet ray, relatively great non-linear optical effect and wide application foreground.

The invention provides an Rb3Al3B3O10F compound, Rb3Al3B3O10F nonlinear optical crystals as well as a preparation method and use thereof and relates to the field of non-linear optical crystal materials. The frequency-doubling conversion efficiency of the Rb3Al3B3O10F nonlinear optical crystals at 1064nm is about 1.2 times of that of the KH2PO4 (KDP) crystal, ultraviolet absorption cutoff edges of the Rb3Al3B3O10F nonlinear optical crystals are shorter than 200nm and the Rb3Al3B3O10F nonlinear optical crystals do not absorb moisture; the large-size transparent Rb3Al3B3O10F nonlinear optical crystals can separately grow by a fluxing agent method and adopting RbF-B2O3 as a fluxing agent; and the Rb3Al3B3O10F crystals have stable physical and chemical properties and moderate hardness and are easy to cut, process, store and use and can be used for preparing non-linear optical devices so as to explore nonlinear optical applications of ultraviolet and deep-ultraviolet bands.

The invention relates to a K3Ba3Li2Al4B6O20F compound, a K3Ba3Li2Al4B6O20F nonlinear optical crystal, a preparation method and application thereof. The crystal is easy to grow up, transparent, and free of inclusion, and has the advantages of fast growth rate, low cost, and easy acquisition of large size crystals, etc. The obtained crystal has the advantages of short ultraviolet absorption cut-off edge, large nonlinear optical effect, stable physicochemical properties, good mechanical properties, and easy processing, etc. The crystal can be used for making nonlinear optical devices. The nonlinear optical devices made from the nonlinear optical crystal can be used in several military and civil high-tech fields, like laser blinding weapons, optical disk recording, laser projection TV, optical calculation and optical fiber communication, etc.

A BaHgSe2 nonlinear optical crystal has no symmetric center, and belongs to an orthorhombic system, the space group is Pmc21, and cell parameters of the crystal are characterized in that a is 0.436nm, b is 1.488nm, c is 0.759nm, alpha = beta = gamma = 90DEG, and Z = 4. A preparation method of the BaHgSe2 nonlinear optical crystal allows crystals to grow through adopting a high temperature melt spontaneous crystallization process or a Bridgman-Stockbarger method; and the crystals have the advantages of fast growth speed, low cost, and easy obtaining of crystals with large dimension in the growth process of the BaHgSe2 nonlinear optical crystal. The obtained BaHgSe2 nonlinear optical crystal has the advantages of large nonlinear optical effects, wide optical transparency waveband, large hardness, good mechanical performances and easy processing, and can be used to make a nonlinear optical device, and the device comprises a device allowing at least one beam of incident electromagnetic radiation to go through at least one BaHgSe2 nonlinear optical crystal in order to generate at least one beam of output radiation with the frequency different from the frequency of the incident electromagnetic radiation.

The invention relates to a CsLiCdP207 compound, a CsLiCdP207 nonlinear optical crystal, a preparation method of the crystal and an application of the crystal. The crystal is transparent and free of inclusion and has the advantages of high growth speed, low cost, short ultraviolet absorption cutoff edge, high nonlinear optical effect, stable physical and chemical properties, good mechanical property, easiness in processing and the like. The crystal can be used for manufacturing a nonlinear optical device. The nonlinear optical device made of the nonlinear optical crystal can be used for a plurality of military and civil high-tech fields such as laser blind weapons, optical disk recording, laser projection televisions, optical computation and optical fiber communication.

A Na2In2GeSe6 nonlinear optical crystal and a preparation method and use thereof are disclosed; the Na2In2GeSe6 nonlinear optical crystal does not have the center of symmetry, belongs to monoclinic system, the space group is Cc, the unit cell parameters are as follows: alpha = gamma =90 degree, beta =108.70 degree, and Z= 4; the Na2In2GeSe6 can be grown by high-temperature melt spontaneous crystallization or crucible descending method; by the growth method of the Na2In2GeSe6 nonlinear optical crystal, the crystal is faster in growth rate and low in cost, a larger size crystal is easy to obtain; the resulting Na2In2GeSe6 nonlinear optical crystal has the advantages of large nonlinear optical effect, wide optical transparency band, large hardness, good mechanical properties, easy processing and the like; the Na2In2GeSe6 nonlinear optical crystal can be used to make non-linear optical components.

The invention discloses a rubidium lithium titanium germanate compound, a rubidium lithium titanium germanate non-linear optical crystal and preparation methods and application thereof. A chemical formula of the rubidium lithium titanium germanate compound is Rb4Li2TiGe4O13; a chemical formula of the rubidium lithium titanium germanate non-linear optical crystal is Rb4Li2TiGe4O13; the rubidium lithium titanium germanate non-linear optical crystal is non-centrosymmetrical structure, belongs to the tetragonal system and has a space group P4nc, is prepared by adopting a co-solvent method. The invention further discloses the rubidium lithium titanium germanate non-linear optical crystal to application of a laser non-linear optical compound functional device, an electro-optical crystal device or a laser device. The rubidium lithium titanium germanate non-linear optical crystal provided by the invention has a relatively great non-linear optical effect, a high electro-optical coefficient anda wide transmission range, has good mechanical properties and does not deliquesce; the frequency-doubled effect is 3 to 5 times of KDP (potassium dihydrogen phosphate).

The invention relates to an Rb3Ba3Li2Al4B6O<20>F compound, an Rb3Ba3Li2Al4B6O nonlinear optical crystal, and a preparation method and a purpose of the Rb3Ba3Li2Al4B6O nonlinear optical crystal. The crystal can easily grow up, is transparent, is provided with no covering body, and has the advantages that the growth speed is high; the cost is low; the large-dimension crystals can be easily obtained, and the like. The obtained crystal has short ultraviolet absorption stop edges, great nonlinear optical effect, stable physicochemical performance, good mechanical property, easy-to-process performance and the like. The crystal can be used for manufacturing a nonlinear optical device. The nonlinear optical device manufactured by the nonlinear optical crystal can be used in a plurality of military and civil high-tech fields, such as laser blind weapons, optical disc recording, laser projection televisions, light calculation and optical fiber communication.

The invention relates to a Cs2LiPO4 compound and Cs2LiPO4 nonlinear optical crystal as well as a preparation method and application thereof. The crystal provided by the invention is easy to grow, is transparent and free of inclusion, and has the advantages of being relatively rapid in growing speed, low in cost, easy in preparing crystal of relatively large size, and the like. The prepared crystal has the advantages of being relatively short in ultraviolet absorption cut-off side, relatively great in nonlinear optical effect, stable in physical and chemical stability, good in mechanical property, easy in processing and the like; the crystal can be used to manufacture nonlinear optical devices; the nonlinear optical devices made of the nonlinear optical crystal can be used in multiple military and civil high-tech fields such as laser blind weapons, optical disc record, laser projection televisions, optical calculation and optical fiber communication.

The invention discloses application of K2Zn2(SO4)3 in preparation of nonlinear optical devices. The K2Zn2(SO4)3 is a nonlinear optical crystal which is prepared by sintering potassium sulfate and zincsulfate as raw materials to prepare K2Zn2(SO4)3 powder and then fusing the K2Zn2(SO4)3 powder. The prepared K2Zn2(SO4)3 crystal is transparent and free of inclusions, has the advantages of faster growth, low cost and the like, also has the advantages of shorter ultraviolet absorption cut-off edge, larger nonlinear optical effect, stable physical and chemical performance, good mechanical properties, easy processing and the like, can be used for manufacturing laser-induced blinding weapons, laser discs, laser projection televisions, optical computing, optical fiber communication and other nonlinear optical devices.

The invention discloses a (Bi1-x-yLnxCey)3TeBO9 compound, (Bi1-x-yLnxCey)3TeBO9 nonlinear optical crystal, (Bi1-x-yLnxCey)3TeBO9 scintillation crystal, a preparation method and an application thereof. The compound crystal with its chemical formula being Bi3TeBO9 is a non-centrosymmetrical structure and belongs to the hexagonal system, and space group is P63. The invention also discloses (Bi1-x-yLnxCey)3TeBO9 compound crystal doped with different rare earth elements, wherein Ln=La-Lu or Y; X is less than 1 and greater than or equal to 0; and Y=0 or Y is less than or equal to 0.2 and greater than or equal to 0.0001. By a flux method, high-quality and large-sized (Bi1-x-yLnxCey)3TeBO9 crystal can grow, has good mechanical property is good, is deliquescence-free, and can be used for manufacturing nonlinear optical devices. A laser manufactured by the use of the crystal can be used in fields of spectroscopy, biomedicine, military and the like. The material of the invention also can be used as high-density fast-attenuation scintillation crystal.

The invention relates to a K3Sr3Li2Al4B6O20F compound, a K3Sr3Li2Al4B6O20F nonlinear optical crystal, and a preparation method and a purpose of the nonlinear optical crystal. The nonlinear optical crystal has the benefical effects of high growth speed, low cost and the like; yhe obtained crystal has the advantages of short ultraviolet absorption stop edge, great nonlinear optical effect, stable physical chemical performance, good mechanical performance, processing simplicity and the like; the crystal can be used for manufacturing a nonlinear optical device;.the nonlinear optical device manufactured by the nonlinear optical crystal can be used in a plurality of military and civil high-tech fields, such as laser blind weapons, optical disc recording, laser projection televisions, light calculation and optical fiber communication.

The invention discloses a difluoro antimony cesium sulfate nonlinear optical crystal and a preparation method and application thereof. A room-temperature solution method is adopted for preparing the difluoro antimony cesium sulfate nonlinear optical crystal, wherein the molecular formula of the crystal belonging to an orthorhombic system is CsSbSO4F2, the molecular weight is 388.72, and the spacegroup is Pna21; the cell parameters include: a=9.9051(5) , b=11.6070(8) , c=5.2822(3) , and V=607.29(6) <3>; the nonlinear optical effect of the crystal is about 0.65KDP, the ultraviolet cut-off side is 233nm, and high rate in penetration of visible light and near infrared band is achieved. The CsSbSO4F2 crystal is transparent and free of inclusion and has advantages of high growth speed, lowcost, stable physicochemical properties, high mechanical performances, easiness in processing and the like, and the crystal is suitable for manufacturing of nonlinear optical devices such as frequencymultipliers, secondary harmonic generators, up-down frequency converters, optical parameter oscillators, laser blinding weapons, laser discs, laser projection televisions and optical computation andoptical fiber communication devices.

The invention relates to a Li8NaRb3(SO4)6.2H2O compound, non-linear optical crystals as well as a preparation method of the Li8NaRb3(SO4)6.2H2O crystals and an application of the Li8NaRb3(SO4)6.2H2O crystals to production of non-linear optical devices. The Li8NaRb3(SO4)6.2H2O compound, the non-linear optical crystals as well as the preparation method and the application of the non-linear optical crystals have the following beneficial effects: the method has the advantages of simple operation, low cost, little pollution, low raw material toxicity, short growth period and the like; the obtainedcrystals have the advantages of shorter ultraviolet absorption cutoff, larger non-linear optical effect, stable physical and chemical properties, good mechanical properties and the like; the crystalscan be used for producing the non-linear optical devices; the non-linear optical devices produced from the non-linear optical crystals can be applied to various fields of military and civil high technologies such as laser blinding weapons, optical disk recording, laser projection televisions, optical computation, fiber-optical communication and the like.

The invention discloses a nonlinear optical crystal, which has a chemical formula of SrHgGeSe4, belongs to an orthorhombic system, and has a space group of Ama2, wherein cell parameters are that a isequal to 10.8345 angstroms, b is equal to 10.7441 angstroms, c is equal to 6.6392 angstroms, alpha is equal to beta, equal to gamma and equal to 90 degrees, and Z is equal to 4. The nonlinear opticalcrystal is a nonlinear optical crystal in an infrared band, and has the advantages of being large in nonlinear optical effect (4.9 times that of AgGaS2 in an equivalent condition), wide in light transmission waveband (0.5 mum to 18 mum), high in double refraction, capable of realizing type I and type II phase matching, good in mechanism property, easy to process, and the like. The invention also discloses a preparation method and application of the nonlinear optical crystal.

The invention relates to an oxysulfide nonlinear optical crystal and a preparation method and application thereof, the chemical general formula of the infrared nonlinear optical crystal is A2CdGe2OS6, A is selected from one or a combination of more of alkaline earth metals Ca, Sr and Ba or rare earth metals Eu, the infrared nonlinear optical crystal belongs to a tetragonal system, the space group has a layered structure, and the thickness of the infrared nonlinear optical crystal is 10-20nm. [CdGe2OS6] < 4-> layers and alkaline earth metal or rare earth metal ions between the layers are stacked in the c-axis direction, Cd is coordinated with four adjacent S to form a [CdS4] < 6-> tetrahedron, Ge is coordinated with three surrounding S and one O to form a [GeOS3] < 4-> tetrahedron, the [CdS4] < 6-> tetrahedron is mutually connected with four [GeOS3] < 4-> tetrahedrons through a common vertex, and the [GeOS3] < 4-> tetrahedrons are mutually connected through a common vertex O.

The invention provides an Li4Sr(BO3)2 compound, Li4Sr(BO3)2 nonlinear optical crystals as well as a preparation method and an application of the Li4Sr(BO3)2 nonlinear optical crystals and relates to the field of nonlinear optical crystal materials. The frequency doubling conversion efficiency of the Li4Sr(BO3)2 nonlinear optical crystals at 1064nm is about twice of that of KH2PO4 (KDP) crystals, the ultraviolet absorption cut-off edge of the Li4Sr(BO3)2 nonlinear optical crystals is shorter than 190nm and the Li4Sr(BO3)2 nonlinear optical crystals do not absorb moisture; by virtue of a fluxing agent method, large-size transparent Li4Sr(BO3)2 nonlinear optical crystals can separately grow with Li2O, Li2O-B2O3 and Li2O-B2O3-LiF as fluxing agents; Li4Sr(BO3)2 crystals have stable physical and chemical properties and moderate hardness and are easily cut, processed, saved and applied, can be used for manufacturing nonlinear optical devices and can develop the nonlinear optical applications at ultraviolet and deep ultraviolet wave bands.

The invention provides a compound, and a synthetic method and application thereof. The compound comprises a [Ga3PQ8]n<2n-> anionic group, wherein Q=S or Se, and n=1 or 2 or 3 or 4. The synthetic method comprises proportioning gallium, phosphorus, Q (Q=S or Se), AX (A=Na or K or Rb or Cs, X=F or Cl or Br or I), uniformly mixing the raw materials, putting in a quartz tube, performing vacuum-pumping, sealing the tube, putting in a muffle furnace, slowly heating to 600-900 DEG C, keeping warm for at least 1 hour, extinguishing the muffle furnace, and naturally cooling to room temperature, so as to obtain the compound. The compound is a colorless or yellow crystal or powder, possesses excellent infrared nonlinear optical performances and extremely high laser damage threshold. The synthetic method is simple in steps, and the obtained product is high in purity, high in yield and suitable for commercialized production.

The invention provides a compound, and a synthetic method and application thereof. The compound comprises a [Ga3PQ8]n<2n-> anionic group, wherein Q=S or Se, and n=1 or 2 or 3 or 4. The synthetic method comprises proportioning gallium, phosphorus, Q (Q=S or Se), AX (A=Na or K or Rb or Cs, X=F or Cl or Br or I), uniformly mixing the raw materials, putting in a quartz tube, performing vacuum-pumping, sealing the tube, putting in a muffle furnace, slowly heating to 600-900 DEG C, keeping warm for at least 1 hour, extinguishing the muffle furnace, and naturally cooling to room temperature, so as to obtain the compound. The compound is a colorless or yellow crystal or powder, possesses excellent infrared nonlinear optical performances and extremely high laser damage threshold. The synthetic method is simple in steps, and the obtained product is high in purity, high in yield and suitable for commercialized production.

The invention discloses a rubidium lithium titanium germanate compound, a rubidium lithium titanium germanate non-linear optical crystal and preparation methods and application thereof. A chemical formula of the rubidium lithium titanium germanate compound is Rb4Li2TiGe4O13; a chemical formula of the rubidium lithium titanium germanate non-linear optical crystal is Rb4Li2TiGe4O13; the rubidium lithium titanium germanate non-linear optical crystal is non-centrosymmetrical structure, belongs to the tetragonal system and has a space group P4nc, is prepared by adopting a co-solvent method. The invention further discloses the rubidium lithium titanium germanate non-linear optical crystal to application of a laser non-linear optical compound functional device, an electro-optical crystal device or a laser device. The rubidium lithium titanium germanate non-linear optical crystal provided by the invention has a relatively great non-linear optical effect, a high electro-optical coefficient anda wide transmission range, has good mechanical properties and does not deliquesce; the frequency-doubled effect is 3 to 5 times of KDP (potassium dihydrogen phosphate).

A Na2In2GeSe6 nonlinear optical crystal and a preparation method and use thereof are disclosed; the Na2In2GeSe6 nonlinear optical crystal does not have the center of symmetry, belongs to monoclinic system, the space group is Cc, the unit cell parameters are as follows: alpha = gamma =90 degree, beta =108.70 degree, and Z= 4; the Na2In2GeSe6 can be grown by high-temperature melt spontaneous crystallization or crucible descending method; by the growth method of the Na2In2GeSe6 nonlinear optical crystal, the crystal is faster in growth rate and low in cost, a larger size crystal is easy to obtain; the resulting Na2In2GeSe6 nonlinear optical crystal has the advantages of large nonlinear optical effect, wide optical transparency band, large hardness, good mechanical properties, easy processing and the like; the Na2In2GeSe6 nonlinear optical crystal can be used to make non-linear optical components.

Disclosed are a K3Ba3Li2Al4B6O20F compound, a K3Ba3Li2Al4B6O20F nonlinear optical crystal, and a preparation method therefor and the use thereof. The obtained crystal is easy to grow, is transparent and has no inclusions, and has the advantages of a relatively fast growth speed, low cost and being prone to obtain crystals of relatively large size, and the like. The obtained crystal has the advantages that the ultraviolet absorption cut-off edge is relatively short, the nonlinear optical effect is relatively large, the physical and chemical properties are stable, the mechanical properties are good, and the crystal is easy to process and the like. The crystal can be used for making a nonlinear optical device. The nonlinear optical device made from the nonlinear optical crystal can be used in several military and civilian high-tech fields, such as laser blinding weapons, optical disc recording, laser projection televisions, optical computing and optical fibre communication, and the like.

The invention discloses a borosilicate compound, a method for preparing powder materials with the same and application of the borosilicate compound. A chemical formula of the borosilicate compound is CsSiB3O7. The method includes uniformly mixing compounds with Cs, compounds with Si and compounds with B according to stoichiometric ratios to obtain mixtures; sintering the mixtures in a resistance furnace at unlimited heating rates and cooling sintered products along with the furnace after the mixtures are completely sintered; sufficiently grinding the sintered products to obtain powder with the borosilicate compound CsSiB3O7. The borosilicate compound, the method and the application have the advantages that excellent nonlinear optical effects can be realized by the borosilicate compound, the borosilicate compound is wide in transmittance range, the absorption cutoff of the borosilicate compound is lower than 200 nm, and powder frequency-doubling effects are identical to powder frequency-doubling effects of KDP (potassium dihydrogen phosphate); the borosilicate compound particularly has high nonlinear coefficients, appropriate double-refraction indexes, wide transmittance wave bands and phase match ranges and high anti-damage thresholds and is good in chemical and mechanical stability; large-size and high-quality single crystals are easy to grow; current application requirements on the performance of nonlinear optical materials can be met, and the borosilicate compound and the method can be applied to preparing nonlinear optical devices.

The invention provides a nonlinear optical crystal beryllium fluorocarbonate with the chemical formula Be2CO3F2 (abbreviated as BCF). Research shows that the BCF crystal of the invention has stronger nonlinear optical effect and greater birefringence than the KBBF crystal. efficiency, higher frequency doubling conversion efficiency, higher deep UV output power, stronger mechanical properties, better machinability, and higher resistance to laser damage; it can be used as an excellent UV and deep UV nonlinear optics Crystals and birefringent crystals, and can be widely used in various nonlinear optical crystal materials and two-dimensional materials.

The invention discloses a LiCs<2>Y<2> (PO<4>)<3> nonlinear optical crystal, a method for preparing the same and application of the LiCs<2>Y<2> (PO<4>)<3> nonlinear optical crystal. The method includessintering Li-containing compounds, Cs-containing compounds, Y-containing compounds and P-containing compounds to obtain LiCs<2>Y<2> (PO<4>)<3> powder; mixing and melting the obtained LiCs<2>Y<2> (PO<4>)<3> powder and fluxing agents with one another to obtain the LiCs<2>Y<2> (PO<4>)<3> nonlinear optical crystal. The LiCs<2>Y<2> (PO<4>)<3> nonlinear optical crystal, the method and the application have the advantages that the LiCs<2>Y<2> (PO<4>)<3> nonlinear optical crystal prepared by the aid of the method is transparent and is free of inclusion, high in growth speed and low in cost; the LiCs<2>Y<2> (PO<4>)<3> nonlinear optical crystal has short ultraviolet absorption cut-off edges, is stable in physical and chemical property, good in mechanical performance and easy to process and can be used for manufacturing laser blinding weapons and nonlinear optical devices for optical disk recording, laser projection television, optical computing, optical fiber communication and the like excellentnonlinear optical effects can be realized by the LiCs<2>Y<2> (PO<4>)<3> nonlinear optical crystal, and the like.

The invention discloses a nonlinear optical crystal. The chemical formula of the nonlinear optical crystal is SrHgSnS4, the structure of the nonlinear optical crystal does not have a symmetric center,the nonlinear optical crystal belongs to an orthorhombic system, the space group of the nonlinear optical crystal is Ama2, and cell parameters are as follows: alpha = beta = gamma = 90 degrees and Z= 4. The nonlinear optical crystal is a nonlinear optical crystal in an infrared band, and has the advantages of being large in nonlinear optical effect (1.9 times of AgGaS2 under the same condition),wide in light-transmitting band (0.6-14 microns), large in birefringence, good in mechanical property, easy to process and the like. The invention also discloses a preparation method and applicationof the nonlinear optical crystal.

The invention discloses an AgZnPS4 nonlinear optical crystal. The AgZnPS4 nonlinear optical crystal does not have the center of symmetry, and belongs to an orthorhombic system; the space group is Pna2[1]; and the cell parameters are as follows: a=12.502A, b=7.599A, c=6.070A, alpha=beta=gamma=90 degrees, and Z=4. The invention also discloses a preparation method of the nonlinear optical crystal by a high-temperature melt spontaneous crystallization process and a crucible descent process. The AgZnPS4 nonlinear optical crystal can be used for manufacturing a nonlinear optical device.

The invention discloses a (Bi1-x-yLnxCey)3TeBO9 compound, (Bi1-x-yLnxCey)3TeBO9 nonlinear optical crystal, (Bi1-x-yLnxCey)3TeBO9 scintillation crystal, a preparation method and an application thereof. The compound crystal with its chemical formula being Bi3TeBO9 is a non-centrosymmetrical structure and belongs to the hexagonal system, and space group is P63. The invention also discloses (Bi1-x-yLnxCey)3TeBO9 compound crystal doped with different rare earth elements, wherein Ln=La-Lu or Y; X is less than 1 and greater than or equal to 0; and Y=0 or Y is less than or equal to 0.2 and greater than or equal to 0.0001. By a flux method, high-quality and large-sized (Bi1-x-yLnxCey)3TeBO9 crystal can grow, has good mechanical property is good, is deliquescence-free, and can be used for manufacturing nonlinear optical devices. A laser manufactured by the use of the crystal can be used in fields of spectroscopy, biomedicine, military and the like. The material of the invention also can be used as high-density fast-attenuation scintillation crystal.

The invention relates to a Li8NaRb3(SO4)6.2H2O compound, non-linear optical crystals as well as a preparation method of the Li8NaRb3(SO4)6.2H2O crystals and an application of the Li8NaRb3(SO4)6.2H2O crystals to production of non-linear optical devices. The Li8NaRb3(SO4)6.2H2O compound, the non-linear optical crystals as well as the preparation method and the application of the non-linear optical crystals have the following beneficial effects: the method has the advantages of simple operation, low cost, little pollution, low raw material toxicity, short growth period and the like; the obtainedcrystals have the advantages of shorter ultraviolet absorption cutoff, larger non-linear optical effect, stable physical and chemical properties, good mechanical properties and the like; the crystalscan be used for producing the non-linear optical devices; the non-linear optical devices produced from the non-linear optical crystals can be applied to various fields of military and civil high technologies such as laser blinding weapons, optical disk recording, laser projection televisions, optical computation, fiber-optical communication and the like.