56 results about "Fluoride glass" patented technology

The invention discloses a rare earth doped glass frequency conversion luminous material and a preparation method thereof. The luminous material is formed by fluoride glass ceramics containing rare earth ions and silver nanoparticles. The preparation method comprises the steps of firstly preparing glass containing rare earth ions, secondly preparing the glass into the glass ceramics containing fluoride crystals through the heat treatment technology, and thirdly soaking the glass ceramics in a mixed salt melt containing silver nitrate to undergo ion exchange, thus obtaining the rare earth doped frequency conversion luminous material jointly enhanced by the silver nanoparticles and fluoride microcrystals. The obtained luminous material has the beneficial effects that the luminous material has good optical property and thermal stability; through irradiation of exciting light, by utilizing the local field enhancement effect of the silver nanoparticles, the rare earth ions in a low phonon energy environment created by the fluoride microcrystals achieve high frequency conversion luminous efficiency which can be maximally enhanced by 30 times, thus effectively making up for the problem of low rare earth ion doped glass frequency conversion luminous efficiency.

The present invention relates to a rare earth doping oxyfluoride tellurite nucleated glass and the preparing method thereof, and the mol percentage of the nucleated glass is as follows: TeO2: 68-73%, ZnO: 15-18%, ZnF2: 7-10%, RF3(R is a rare earth element): 3-5%. The preparing method is firstly preparing oxyfluoride tellurite glass with a melting method, then through an accurate heat processing technique the substrate glass is heat treated for crystallization to obtain a transparent oxyfluoride tellurite nucleated glass. The prepared oxyfluoride tellurite nucleated glass is excellent and has excellent infrared transmitting property and the dimension of the crystal phase in the nucleated glass is tens in nano-scale. The preparing method of the nucleated glass of the invention is simple relatively, comparing with the fluoride glass the stability of the glass is better and the heat treating blooming process can be controlled more easily. The nucleated glass is suitable for applying in the optical window material of the mid-infrared waveband, and is used for high intensity upper converting luminous material.

A glass ceramic material for storing energy of X-rays and releasing said energy by photo-stimulation comprising a fluoride glass matrix containing micro-crystalline particles, said particles having an average particle size, d, so that d<2 mum and said glass ceramic shows in a XRD spectrum a continuous spectrum of said glass matrix and discrete peaks superimposed on said continuous spectrum. Said glass matrix contains preferably zirconium ions and ions selected from the group consisting of alkali ions and alkaline earth ions, at least 5 mole % of the fluoride ions is replaced by bromide and/or chloride ions and at least 0.01 mole % of cations selected from the group consisting of transition metal ions, rare earth metal ions, In+, Ga+, Tl+, and Pb2+ is present.

These glasses incorporate a combination of F and Al2O3 to achieve even wider fluorescence and improved gain flatness. In addition, SPCVD incorporates large amounts of N into low-loss fiber whose high charge has an impact on rare earth behavior. The Surface Plasma Chemical Vapor Deposition (SPCVD) produces fiber preforms with high levels of F, Al2O3, and N. These heavily fluorinated glasses provide much broader Er3+ emission than Type I or Type II silica for enhanced multichannel amplifiers. SPCVD successfully fluorinates silica with losses below 5 dB/km and increased Er3+ emission width.

The invention provides an erbium ion doped intermediate infrared luminous fluorine tellurate glass. In terms of mol percentage, the glass comprises the following components by mole percent: 43-53 % of ZrF4, 18-22 % of CaF2, 3-5 % of YF3, 2-4 % of AlF3, 18-22 % of NaF, 0-5 % of TeO2, 0-5 % of GeO2, 0-5 % of Bi2O3 and 2-8 % of ErF3. The glass is prepared by using a covered platinum crucible and a silicon carbide rod electric furnace melting method. According to the invention, after heavy metal oxide is introduced, a fluoride glass is still transparent without crystallization, the infrared transmission rate of the glass is 85 % near intermediate infrared 2.7 microns, the heat stability of the glass is improved and the chemical stability of the glass is also improved; under laser diode pumping with wavelength of 980 nm, obviously enhanced intermediate infrared 2.7 microns fluorescence can be obtained; and the erbium ion doped intermediate infrared luminous fluorine tellurate glass provided by the invention is suitable for preparing and using erbium ion doped special glass and optical fiber materials which are luminous at intermediate infrared wave band of 2.7 microns.

The invention provides a novel method for preparing a high-damage-threshold laser window material, which is stable in chemical properties and high in damage-threshold. The technical scheme is that novel large-size high-damage-threshold laser window glass is obtained through the fact that an oxide accessory ingredient capable of improving glass forming properties and materialization properties of the material is introduced in fluoride glass. The method solves the problem that the fluoride glass is easy in devitrification, poor in glass forming and difficult in large-size production. Simultaneously, the damage-threshold is obviously improved, and the method can be used in a high-energy laser for improving load capacity and has important functions on smooth advancement of inertial confinement fusion (ICF).

A rear earth-doped luminescent glass for a white light light emitting diode and a preparation method therefor. The method uses rare earth Pr<3+> and Ho<3+> as main uminescent ions that are co-doped in a fluoride glass substrate, and are coordinated with a 445 nm blue LED to excite and emit a white light. The preparation method for the glass comprises three steps: obtaining raw materials, mixing glass batch materials, and melting the glass. The glass provided by the present invention can be excited by a blue light emitting diode to output a white light. The rear earth-doped luminescent glass is a multicomponent ZrF4-ZnF2 glass, and compared with ZBLAN glass, the glass provided by the present invention has the advantages of a higher glass transition temperature, better chemical and mechanical properties and a high luminous efficiency, and the like. Compared with YAG: Ce fluorescent powder, the glass provided by the present invention has the advantages that the preparation method is simple in process, easy to operate, low in cost and the like.

Disclosed is an efficient cooling large-mode-area mid-infrared photonic crystal optical fiber laser device. The efficient cooling large-mode-area mid-infrared photonic crystal optical fiber laser device is in a structural design of double-cladding photonic crystal fiber, wherein the internal cladding is fluoride glass; a fiber core is made of high erbium-doped fluoride glass and provided with a plurality of air holes, which are with a diameter of d and spaced at a pitch of lambda. According to the efficient cooling large-mode-area mid-infrared photonic crystal optical fiber laser device, by adjusting the structure of the air holes of the photonic crystal optical fiber, the refractive index difference between the fiber core and the inner cladding can be reduced, the mode field diameter of the optical fiber can be increased. The efficient cooling large-mode-area mid-infrared photonic crystal optical fiber laser device comprises an efficient cooling device, inert gas is fed into the air holes, the air holes can provide cooling channels to increase the specific surface area for cooling, so that heat generated inside the photonic crystal optical fiber, particularly inside the fiber core, can be rapidly guided out of the optical fiber. Therefore, the cooling problem of large-core-diameter fiber can be solved, and possibility for achieving hectowatt-scale 2.7 mm single-mode laser output can be obtained.

The invention relates to a Tm3+ doping-based fluoride glass microsphere laser, which belongs to the field of solid lasers and mainly comprises a micro-nano optical fiber, a fluoride glass microsphereof the ZYA doped with Tm3+, a pump source and a spectrometer. The pump source, the micro-nano optical fiber, the fluoride glass microsphere of the ZYA doped with Tm3+ and the spectrometer are coupledby a single-mode optical fiber in sequence. The method adopts a CO2 laser micromachining mode to prepare the fluoride glass microsphere of the ZYA doped with Tm3+, and realizes the 2-micron laser output of the fluoride glass microsphere of the ZYA doped with Tm3+. The laser in the invention has the characteristics of low threshold value and high Q value; and the structure is simple, the miniaturization and integration of the laser can be realized under a low threshold value, and a new matrix material is provided for the laser technology. The 2-micron laser obtained by the invention can be applied to the fields of integrated photonics, low-threshold laser, high-sensitivity biosensing, cavity photodynamics and the like.

A phosphor-dispersed glass according to one aspect of the present invention includes phosphor particles and a phosphor encapsulant, wherein the phosphor encapsulant is a fluoride glass material containing 1 to 45 mol % of AlF₃, 30 to 60 mol % of a sum of a fluoride of Hf and a fluoride of Zr, 20 to 65 mol % of alkaline earth fluorides in total, 2 to 25 mol % in total of at least one fluoride of element selected from the group consisting of Y, La, Gd and Lu and 0 to 20 mol % in total of at least one fluoride of element selected from the group consisting of Na, Li and K. It is feasible in this phosphor-dispersed glass to suppress deactivation of the phosphor particles regardless of the kind of the phosphor.

The invention discloses a mid-infrared electro-optical modulator based on a black phosphorus fluoride waveguide, belongs to a mid-infrared electro-optical modulator in the field of optical communication, and aims to provide the mid-infrared electro-optical modulator based on the black phosphorus fluoride waveguide. Fluoride glass is used as a waveguide material, so that a modulation rate of the mid-infrared electro-optical modulator is effectively improved. The invention adopts the technical scheme that the mid-infrared electro-optical modulator comprises a substrate layer; a groove is formed on the upper surface of the substrate layer; a first optical waveguide is arranged in the groove; a first isolation dielectric layer, a first black phosphorus layer, a second isolation dielectric layer, a second black phosphorus layer and a third isolation dielectric layer are sequentially laminated on the upper surface of the first optical waveguide from bottom to top; a second optical waveguide is arranged on the upper surface of the third isolation dielectric layer; the first black phosphorus layer extends out of the left side of the first optical waveguide and is connected with a first electrode; the second black phosphorus layer extends out of the right side of the first optical waveguide and is connected with a second electrode. The invention is applicable to the mid-infrared electro-optical modulator.

Fluoride glass and a preparing method thereof are disclosed. The fluoride glass includes, in mole percentages, 16-70% of ZrF4, 13-32% of BaF2, 5-18% of MF, 0-14% of MeF2 and 0-28% of MfF3, wherein the M is one or two selected from Na and Li, the Me is one or more selected from Zn, Mg and Ca, and the Mf is one or two selected from Al and La. The fluoride glass has a low cost and is suitable for applications in optical windows of near ultraviolet to middle-infrared wavebands. The cutoff wavelength of the prepared glass is greater than 6 [mu]m. The glass has good glass forming capacity, and is suitable for preparing matrix glass of infrared laser fibers and fiber optic amplifiers and other optical materials. The glass has good glass forming capacity, good chemical stability, and low theoretical loss and is suitable for preparing matrixes of low-loss fluoride fibers and doped fibers.

The invention provides Ho<3+> doped ZBYA fluoride glass. The molar percentage of the concentration of the raw materials to the concentration of the doping ions is 50ZrF4-33BaF2-(10-x)YF3-7AlF3)-xHoF3(x=0.1, 0.2, 0.5, 1, 2, 3, 4, 5, 7, 9). The preparation method comprises the following steps: weighing the high-purity raw materials according to the proportion; putting the mixture into a platinum crucible, putting the platinum crucible into a high-temperature furnace (850 DEG C) in a glove box for melting; pressing the molten glass into a precursor glass sample; placing the sample in an annealing furnace for an annealing treatment so as to eliminate stress in the glass, and cooling to the room temperature to obtain Ho<3+> doped ZBYA fluoride glass. The provided glass generates farthest 3.9 [mu]m mid-infrared band fluorescence under the excitation of 888 nm laser, and the wavelength has an important application value in the fields of spectroscopy, remote sensing, medical treatment, environmental protection, military affairs and the like.

The invention discloses low-cost ZBAN quaternary system fluoride optical glass and a preparation method thereof. The glass provided by the invention is prepared from quaternary fluoride systems ZrF4, BaF2, AlF3 and NaF; good ventilation characteristics are realized in near-infrared to medium infrared waveband; the fluoride glass transmission rate at the 4 to 6 mum waveband can reach 60 percent. The invention also provides the preparation method of the glass. The preparation method mainly comprises modified melting, shaping and annealing processes. The glass and the preparation method are based on simple preparation conditions; the drying and oxygen-free environment in the raw material melting process is ingeniously realized through methods of low-temperature fluorination and the like; the experiment cost is reduced; the requirements on experiment requirements is reduced; the process is simple; the material cost is low; the optical glass cost is greatly reduced.

A fiber-based supercontinuum system including: a pump laser; a ZBLAN or other fluoride-based microstructured glass fiber; and control electronics; wherein the control electronics control the pump laser to generate laser pulses into the ZBLAN or other fluoride-based microstructured glass fiber. The fabrication of a ZBLAN photonic crystal fiber with sub-micron features and large air- filling fraction and the use of the fiber to generate a stable supercontinuum (200 to 2500nm) from 140fs, 1nJ pulses at 1042nm are disclosed.

The invention relates to infrared-transmission fluorozirconate glass containing Ga2O3. The gallium oxide is introduced into composition of ZrF4-BaF2-LaF3-AlF3--NaF(ZBLAN) fluoride glass, and the fluorozirconate fluoride glass is modified by the gallium oxide, and the fluorozirconate glass containing the gallium oxide comprises the following raw materials, in percentages by molar: (100-x)(ZrF4-AlF3-BaF2-NaF-LaF3)-xGa2O3. The fluorozirconate glass containing the gallium oxide is prepared by adopting a melt cooling method, and the prepared glass is transparent, has no crystallization, and has very good transmittance equivalent to that of fluorozirconate glass in the middle infrared wave band from 3[mu]m to 5 [mu]m; and the fluorozirconate glass containing the Ga2O3 has better thermal stability (delta T) than ZBLAN glass and very good middle-infrared transmission performance, and is particularly suitable for use as a window material in the middle-infrared wave band.

The invention discloses a long-pupillary-distance and shortwave infrared spectral imaging objective lens. The objective lens comprises five optical lenses which are sequentially arranged on a system optical axis from a light bar to an image surface. An achromatism glass pair with the focal power of positive, negative and negative is formed by the first three optical lenses. A very good achromatism capability is achieved on the short wave infrared outer section through the combination of fluoride glass and dense flint glass, and meanwhile a high spectrum transmittance rate is achieved. The fourth optical lens is used for balancing astigmatism and the curvature of field of the system to increase the view field capability of the imaging objective lens. The fifth optical lens is used for further compensating for the astigmatism of the objective lens and meanwhile is used for meeting the requirement of the imaging objective lens for telecentric performance in image space. Finally, the requirement for the achromatism in the long papillary distance and shortwave infrared band can be met.

A broadband emission material according to the present invention includes: a fluoride glass containing 20 to 45 mol % of AlF₃, 25 to 63 mol % of alkaline-earth fluorides in total and 3 to 25 mol % of at least one fluoride of element selected from the group consisting of Y, La, Gd and Lu; and ytterbium ions incorporated in the fluoride glass as divalent rare-earth ions so as to serve as a luminescent center, wherein the fluoride glass includes 1 to 15 mol % of at least one halide of element selected from the group consisting of Al, Ba, Sr, Ca and Mg and element selected from the group consisting of Cl, Br and I; and wherein the alkaline-earth fluorides includes 0 to 15 mol % of MgF₂, 7 to 25 mol % of CaF₂, 0 to 22 mol % of SrF₂ and 0 to 5 mol % of BaF₂.