8 results about "Barium borate" patented technology

The invention provides a barium metaborate composite structure, a preparation method thereof and an optical device. The barium metaborate composite structure comprises a barium metaborate substrate and an anti-reflection layer or a composite anti-reflection structure arranged on one side surface or two side surfaces of the barium metaborate substrate; the composite anti-reflection structure comprises a first film layer, a second film layer and a third film layer which are stacked in the direction away from the barium metaborate substrate, and the refractive index of the second film layer at the wavelength of 266nm is larger than that of the first film layer and that of the third film layer; the material of the anti-reflection layer, the material of the first film layer and the material of the third film layer respectively and independently comprise metal fluoride, and the refractive index of the metal fluoride at the wavelength of 266 nm is smaller than 1.45. According to the barium metaborate composite structure, the metal fluoride material with the specific refractive index is arranged on the surface of the barium metaborate substrate to serve as the anti-reflection material, and the laser damage resistance threshold value in the ultraviolet 266nm wave band is effectively matched and improved.

This invention discloses a barium borate crystal, its preparation method, and its applications. The barium borate crystal has the chemical formula Ba₂BeB₂O₆, a non-centrosymmetric structure, belongs to the orthorhombic crystal system, has the space group Pca₂₁, and its cell parameters are α = 90°, β = 90°, and γ = 90°. This barium borate crystal exhibits extremely low birefringence from the ultraviolet to the infrared band, and its extremely low birefringence supports its application on zero-order glass slides.

A quantum entanglement device and a method of manufacture thereof are described. Specifically, an optical fiber for generating entangled photons is described that includes an optical core and photon entanglement media disposed relative to the optical core. The photon entanglement media includes at least one non-linear crystal, such as Barium Borate. A method of manufacturing an optical fiber is also described that includes providing a fiber preform that contains a nonlinear optical crystal within it, heating the fiber preform until the fiber preform reaches a predetermined temperature, and drawing the optical fiber form the preform, thereby generating an optical fiber having a photon entanglement media disposed therein, where the photon entanglement media comprises at least one non-linear crystal.

The invention belongs to the technical field of optical crystal materials, and particularly relates to a melamine fluorosulfonate nonlinear optical crystal and a growth method and application thereof. The preparation method comprises the following steps: taking C3N6H6 and HSO3F as raw materials to prepare a melamine fluorosulfonate compound; and enabling the melamine fluorosulfonate crystal to directionally grow on the surface of the seed crystal by adopting a top seed crystal method to obtain the melamine fluorosulfonate nonlinear optical crystal. The spatial arrangement and the group density of a pi-conjugated [C3N6H8] group are effectively adjusted by using a fluorosulfonic acid group, and meanwhile, the compound has a relatively large frequency-doubled effect, a short ultraviolet cut-off edge and proper birefringence (0.064 at-1064nm), and can realize direct frequency-doubled output of short-wavelength ultraviolet laser. Compared with beta-barium borate, the birefringence of the material is reduced by about 44%, the walk-off effect is effectively avoided, and the material has application prospects in all-solid-state 266 nm ultraviolet lasers.

The invention discloses dysprosium-doped barium borate yellow fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of luminescent materials. According to the invention, barium borate (Ba3B2O6) is taken as a substrate, and a series of Dy < 3 + >-doped yellow fluorescent powder Ba3B2O6: xDy < 3 + > with different concentrations are successfully prepared through a high-temperature solid-phase method, and x is 0.01-0.10. The prepared Dy < 3 + >-doped yellow fluorescent powder is combined with nitride red powder (CaAlSiN3: Eu < 2 + >, the main peak is 630 nm) and an ultraviolet LED chip (365-375 nm) to prepare a warm white LED with high color temperature and high color rendering index, and the defects that commercial yellow fluorescent powder lacks a cyan area under blue excitation and has blue light hazards can be overcome.

The invention relates to a compound potassium rubidium barium borate, a potassium rubidium barium borate birefringent crystal and a preparation method and application thereof. The chemical formula of the compound is KxRb (2-x) BaB6O11, x is equal to 0.7-1, the molecular weight is 502.74-517.61, and the compound is synthesized by adopting a solid-phase reaction method. The chemical formula of the crystal is KxRb (2-x) BaB6O11, x is equal to 0.7-1, the molecular weight is 502.74-517.61, the crystal belongs to an orthorhombic system, the space group is Pnma, the cell parameters are as follows: a is equal to 15.1923 (9), b is equal to 7.6510 (5), c is equal to 8.7527 (5), Z is equal to 4 and V is equal to 1017.38 (11) 3, and the crystal is prepared by adopting a high-temperature melt method; the crystal is used for a deep ultraviolet-infrared band and is a biaxial crystal, the transmission range of the crystal is 200-3500 nm, and the birefringence of the crystal is 0.08 (546 nm). The method has important application in the fields of optics and communication, and can be used for manufacturing polarization beam splitting prisms, phase delay devices and electro-optical modulators.

The invention discloses a preparation method of an advanced screen display ZnO-Al2O3-SiO2-based glass substrate, and belongs to the technical field of novel preparation processes of screen display glass materials. According to the technical scheme, the method is characterized in that ZnSiO3 and Al2 (SiO3) 3 are selected as glass melting raw materials, one or more of calcium borate or barium borate is selected as a cosolvent, the raw materials can be completely melted and reacted at 1260 DEG C, and the temperature of the raw materials is far lower than that of conventional oxide preparation; the clarifying agent is selected from one or more of cerium dioxide, barium sulfate, calcium sulfate or zirconium oxide, and the auxiliary materials not only serve as the clarifying agent, but also play a role of a nucleating agent in the glass crystallization process, so that sufficient use and compatible chemical effects of additives are formed, and excessive introduction of impurities is avoided. The clear glass clarification time and temperature treatment process are beneficial to regulation and control of crystallization degree and hardness, and the stability of the substrate in the process of preparing the TFT-LCD on the substrate glass in the later period is guaranteed.

The present application relates to a kind of compound barium lanthanum bromoborate and a kind of preparation method and purposes of barium lanthanum bromoborate nonlinear optical crystal, the chemical formula of the compound barium lanthanum bromoborate and its nonlinear optical crystal are all Ba 13 Br, the crystal belongs to hexagonal system, and space group is all P 63 mc , cell parameter is a=10.9580 (9) Å, b=10.7828 (6) Å, c=7.0412 (6) Å, V=732.22 (14) Å 3 , molecular weight is 1287.93, and the powder frequency doubling effect is about 6 times KDP (KH2PO4). Compound barium lanthanum bromoborate is synthesized using solid phase reaction method, barium lanthanum bromoborate nonlinear optical crystal is grown using high-temperature melt method or crystal is grown using pulling method, the crystal preparation method is simple, low in cost, and the crystal prepared has large mechanical hardness, and barium lanthanum bromoborate crystal obtained by the method is applied as nonlinear optical frequency doubling device.