162 results about "Phonon energy" patented technology

The invention discloses Li3YCl6 glass ceramics doped with rare earth ions. The Li3YCl6 glass ceramics is prepared from 87.8-94 mol% of SiO2, 5.5-10 mol% of Li3YCl6 and 0.5-3 mol% of LnCl3, wherein LnCl3 is at least one of YbCl3, ErCl3, TmCl3 and HoCl3. The Li3YCl6 glass ceramics has the advantages of being transparent, resistant to air slake, good in mechanical performance, high in blue and purple light transmittance, low in phonon energy, high in up-conversion efficiency, capable of greatly improving efficiency of an up-conversion laser device, simple in preparation method and low in production cost.

A tellurite-based glass composition for use in EDFAs exhibits higher phonon energy without sacrificing optical, thermal or chemical durability properties. The introduction of boron oxide (B₂O₃) into the Er³⁺-doped tellurite glasses increases the phonon energy from typically 785 cm⁻¹ up to 1335 cm⁻¹. The inclusion of additional glass components such as Al₂O₃ has been shown to enhance the thermal stability and particularly the chemical durability of the boro-tellurite glasses. Er:Yb codoping of the glass does further enhance its gain characteristics.

Disclosed herein is a low phonon energy glass and a fiber made therefrom. The glass includes the following components given in mol percent: - germanium 0.1-30 - arsenic 0-40 - X 0.01-20 - Y 40-85 - wherein X is selected from the group consisting of gallium, indium and mixtures thereof wherein Y is selected from the group consisting of selenium, and mixtures of selenium and up to 50% of sulfur substituted for selenium and the glass also contains 0.001-2 weight percent of a rare earth, based on the weight of said components. The fiber has a minimum loss of less than 5 dB/m.

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 invention discloses a rare earth ion doped down-conversion luminescence transparent microcrystalline glass, which is obtained by doping rare earth ion in an oxyfluoride microcrystalline glass substrate with the molar concentration of the rare earth ion to be 1-40% and the volume percent of the fluoride microcrystal in the glass matrix to be 1-50%. The down-conversion luminescence transparent microcrystalline glass of the invention has the advantages of low phonon energy of the fluoride, excellent machining characteristic and chemical stability of the oxide glass and quantum efficiency which is more than one; the glass slowly ages under the condition of outdoor long-term illumination and can also be machined into transparent plate shape or even ultrathin plate shape, therefore, the glass is one of the best selections which can be used in solar cells, and has wide application prospect.

A practical technique for inducing and controlling the fusion of nuclei within a solid lattice. A reactor includes a loading source to provide the light nuclei which are to be fused, a lattice which can absorb the light nuclei, a source of phonon energy, and a control mechanism to start and stop stimulation of phonon energy and/or the loading of reactants. The lattice transmits phonon energy sufficient to affect electron-nucleus collapse. By controlling the stimulation of phonon energy and controlling the loading of light nuclei into the lattice, energy released by the fusion reactions is allowed to dissipate before it builds to the point that it causes destruction of the reaction lattice.

The invention discloses an Er<3+>/Yb<3+> co-doped yttrium lithium fluoride monocrystal and a preparation method thereof. The yttrium lithium fluoride monocrystal is a rare earth ion Er<3+>/Yb<3+> co-doped monocrystal; the molecular formula is LiY(1-x-y)ErxYbyF4, wherein x is greater than or equal to 0.008 and less than or equal to 0.085, and y is greater than or equal to 0.002 and less than or equal to 0.170; the segregation coefficients of Yb<3+> and Er<3+> in the yttrium lithium fluoride are about 1, and efficient intermediate infrared laser of 2.7 microns can be output; and the yttrium lithium fluoride monocrystal has high transmittance of intermediate infrared laser, has better thermal, mechanical and chemical stabilities than those of glass state materials and has the characteristics of low phonon energy, high optical transmittance of wavebands with width of 300-5500nm, less color center forming amount, low thermal lens effect and the like, thereby being more easily processed and more suitably used in laser devices. In the preparation method disclosed by the invention, a sealing crucible falling technology is used, so that the operation is simple; the raw material is fluorated at high temperature in a sealed water-free and oxygen-free environment, so that the crystal is isolated from air and water vapor during the growth; and therefore, the high-quality Er<3+>/Yb<3+> co-doped LiYF4 monocrystal containing little OH<-> ion and oxide is obtained.

This inventive infrared ray transmitting glass (gallate glass) is composed of (by mol percentages): Ga2O3:5-40, MO/MCO3:30-70,MF2/MCl2:0.1-25,Me2O3:0-24. During the smelting, introduced are: dry air, CC14, GeC14, C12, SOC12, one or more of these kinds, to effectively lower the harmful content of hydroxyl. The glass has its cut-off wavelength longer than 6um, and has advantages of: low glass phonon energy, better glass formation property, excellent mechanical property, high optical quality, low hydroxyl content, suitable for making plane sensor window, scout plane window, automobile window, head cover of missile, optical fiber of infrared ray laser, substrate glass of optical fiber amplifier.

The invention discloses a preparation method of rare earth ion doped tungsten oxygen fluoride silicate up-converted luminescent glass. The preparation method comprises the steps of: firstly, uniformly mixing silicon dioxide, germanium dioxide, aluminum oxide, tungsten oxide, calcium fluoride, titanium dioxide and rare earth oxide in a mortar; and then preparing the Er<3+>-Yb<3+> rare earth ions doped tungsten oxygen fluoride silicate up-converted luminescent glass by adopting a high-temperature melting annealing method. The method disclosed by the invention is simple in preparation method, low in raw material cost and simple in required device without a special device; and the overall preparation process is carried out in air atmosphere. According to the invention, tungsten oxide is introduced into an oxygen fluoride silicate glass substrate for the first time, and the further solution of the problems that the oxygen fluoride silicate glass is poor in chemical stability and mechanical strength after tungsten oxide is introduced is facilitated, so that the glass product has the advantages of low phonon energy of fluoride and good crystallization stability of oxide, thereby obtaining strong up-converted red and green light output visible to naked eyes.

The invention discloses a glass ceramics whispering gallery mode resonant cavity capable of outputting single mode high-performance laser and a preparation method thereof, and belongs to the field ofoptical devices. The method comprises the following steps: firstly mixing raw materials for preparing the glass resonant cavity with rear earth active ion raw materials sufficiently, then carrying outmelting and rod winding to obtain active fiberglass; drawing the active fiberglass to tapered fiber by melt extraction, and truncating the tapered fiber in the middle to obtain single taper fibers; melting the thin ends of the single taper fibers through a heating source, and forming a microsphere cavity by utilizing the action of surface tension; carrying out heat treatment or laser-induced treatment on the microsphere cavity to obtain a glass ceramics microsphere cavity, and carrying out coupling with the tapered fiber and packaging to obtain the glass ceramics whispering gallery mode resonant cavity. According to the invention, the preparation process is simple, the prepared glass ceramics microsphere cavity has relatively high quality factor, the influence on active ion gain propertyof amorphous state and relatively high phonon energy of glass is improved by the separation of microcrystal, and laser output with lower threshold value and higher slope efficiency can be realized.

The invention discloses a Pr/Yb doped yttrium lithium fluoride monocrystal used for modulation of a solar spectrum and a preparation method thereof. The LiYF4 monocrystal has the characteristics of low phonon energy, high broadband optical transmission, good physicochemical stability and the like. Pr<3+> and Yb<3+> ions are simultaneously doped into the LiYF4 monocrystal, and the concentration of the doped Yb<3+> ions is greater than the concentration of the doped Pr<3+> ions; under excitation of 480-nm light, energy of the Pr<3+> ions is transferred to the Yb<3+> ions so as to allow each Pr<3+> ion to absorb a photon with an ultraviolet wavelength of 480 nm and each Yb<3+> ion to release two near-infrared photons with a wavelength of 980 nm; and thus, modulation of a solar spectrum is effectively realized, high luminous efficiency is obtained, and the Pr/Yb doped yttrium lithium fluoride monocrystal has excellent resistance to light irradiation, mechanical properties, thermal properties, physicochemical performance and optical transmission. The preparation method for the monocrystal is simple, and the prepared monocrystal has high purity and good quality.

Methods for synthesizing fibers having nanoparticles therein are provided, as well as preforms and fibers incorporating nanoparticles. The nanoparticles may include one or more rare earth ions selected based on fluorescence at eye-safer wavelengths, surrounded by a low-phonon energy host. Nanoparticles that are not doped with rare earth ions may also be included as a co-dopant to help increase solubility of nanoparticles doped with rare earth ions in the silica matrix. The nanoparticles may be incorporated into a preform, which is then drawn to form fiber. The fibers may beneficially be incorporated into lasers and amplifiers that operate at eye safer wavelengths. Lasers and amplifiers incorporating the fibers may also beneficially exhibit reduced Stimulated Brillouin Scattering.

The invention discloses a zirconium-oxide-based rare earth up-conversion luminescent film material and a preparation method of the material. A zirconium oxide film prepared by a sol-gel method is taken as a host material, and a high-efficiency up-conversion luminescent film material is obtained due to the co-doping of sensitizing agent and up-conversion luminescent center. The used host material is high in chemical stability, heat stability and optical transparency, wider in forbidden band width, and lower in phonon energy. The proportion among rare earth ions can be easily regulated and controlled by doping the solution, so that the up-conversion luminescent waveband can be conveniently adjusted. A precursor body sol is good in stability, and can be stored for a long time and repeatedly used when the material is prepared. Meanwhile, the obtained film material is easy to prepare, is easy to be combined with a device, and is good for the device application.

The invention discloses tellurium-based sulfur series infrared glass. The glass comprises the following components: 10 to 20 mole percent of In2Te6, 45 to 80 mole percent of GeTe 4 and 5 to 40 mole percent of AgX, wherein the total mole percentage of all components is 100 percent; X is Cl or Br or I; the transition temperature (Tg) of the glass is between 170 and 200 DEG C; the thermal stability temperature (delta T) of the glass is between 100 and 120 DEG C; the thickness of the glass is no more than 1.4 millimeters; and a cut-off edge through which an infrared band can pass is up to 25 mu m. The glass has an appropriate transition temperature, and high thermal stability, reduces the base frequency molecular vibration of the glass due to the adoption of a heaviest element in a sulfur group, namely, tellurium and reduces the phonon energy of the glass. Simultaneously, the thickness of the glass is controlled to be no more than 1.4 millimeters so that the influence of multi-phonon absorption is reduced, the cut-off edge, through which the infrared band can pass, of the tellurium-based sulfur series infrared glass is enhanced and can reach 25 mu m, substances with long far infrared wavelengths can be absorbed and spectrum detection space is expanded. The glass preparation method has the advantages of simple process, high glass forming capability, no corrosion, easy operation, short processing period and high efficiency.

The present invention relates to a solid state laser device with a solid state gain medium between two resonator end mirrors (3, 5) and a GaN-based pump laser (1) arranged to optically pump the solid state gain medium. The solid state gain medium is a Pr³⁺-doped crystalline or polycrystalline host material (4) which has a cubic crystalline structure and highest phonon energies of ≦600 cm and provides a band gap of ≧5.5 eV. The proposed solid state laser can be designed to emit at several visible wavelengths with the emitted power showing a reduced dependence on the temperature of the GaN-based pump laser (1).

The invention relates to high-luminous-intensity terbium-activated silicate glass and a preparation method thereof. The invention belongs to the field of luminescent materials. According to the invention, B2O3 with high phonon energy is added into a terbium-activated silicate glass formula; the mixture is well mixed; and preparation is carried out through high-temperature fusing and an annealing treatment. B2O3 takes 2-20% of a total weight of the glass formula. The glass and the method are advantaged in that: with he prepared terbium-activated silicate glass, the luminous intensity of Tb<3+> is effectively improved. The luminescent glass can be used in fields such as displaying, illumination and photoelectric devices.

The invention relates to transparent glass with the characteristic of emitting intermediate infrared light with a wavelength of 3.5 [mu]m and a preparation method thereof. A glass substrate of the transparent glass comprise the following chemical components: 25.5InF<3>-15ZnF<2>-18BaF<2>-11.5GaF<3>-8SrF<2>-12PbF<2>-5LiF-2LaF<3>-2YF<3>-1ErF<3> and 25.5InF<3>-15ZnF<2>-18BaF<2>-11.5GaF<3>-8SrF<2>-12PbF<2>-5LiF-5ErF<3>, wherein the sum of the molar percentages of all the compounds is 100%. The prepared glass has the characteristics of high transmittance, good thermal stability, low phonon energy and high fluorescence quenching concentration. Compared with the prior art, strong fluorescence with a wavelength of 3.5 [mu]m can be obtained under 635-nm laser diode pumping, and the transparent glasshas the potential of serving as a gain medium of a 3.5-micron fiber laser; and due to the fact that the preparation process of the transparent glass is simple, batch production can be achieved, and the transparent glass can be widely applied to the field of mid-infrared laser.

The invention discloses a rare earth doped nanoprobe, preparation and a new coronavirus detection probe. The rare earth doped nanoprobe is a praseodymium doped sodium lutetium fluoride coated sodium yttrium fluoride with a core-shell structure, wherein the formula of the rare earth doped nanoprobe is NaLu1-xF4:Prx@NaYF4, wherein the NaLu1-xF4 is a matrix, and the doping ion is praseodymium; the colon refers to praseodymium doping, wherein x is the doping molar ratio of rare earth ions, and the range of x is 0.0005-0.05; the NaYF4 is a shell layer, and the symbol @ refers to that NaYF4 coats the surface of NaLu1-xF4:Prx. According to the invention, rare earth fluoride is used as a matrix and different rare earth ions are doped, so that the praseodymium-doped lutetium sodium fluoride nanometer probe with high performance is synthesized; the doping of lutetium and the doping proportion further reduce phonon energy of the matrix and improve the efficiency of energy conversion, and the doping of praseodymium can utilize the luminescence of praseodymium at about 610 nm to facilitate the detection, so that the rare earth nanoprobe with strong photochemical property stability and long luminescence service life is prepared.