53results about How to "Adjustable refractive index" patented technology

The invention discloses a preparation method for phenyl hydrogen-containing silicone oil, which comprises the steps as follows: firstly, phenyl alkoxyl silane and cyclosiloxane are used as basic reaction monomers; moreover, organic solvent, water and blocking agent are added to implement hydrolysis condensation reaction under the effect of acidic catalyst; secondarily, after the hydrolysis condensation reaction is completed, the reaction liquid obtained is washed to neutral and then low-boiling substances in the reaction liquid are removed, thus obtaining the phenyl hydrogen-containing silicone oil. The preparation method for phenyl hydrogen-containing silicone oil has the advantages of easily obtained material, simple operation, easy control, no pollution, gentle condition and convenientindustrialization. The number-average molar mass of the phenyl hydrogen-containing silicone oil prepared is between 0.5*103 and 5.0*103, the refractive index is adjustable between 1.41 and 1.60 and the hydrogen content is adjustable between 0.2 and 1.2wt percent. The phenyl hydrogen-containing silicone oil has excellent performances of high refractive index, high light transmittance, radiation resistance, high and low temperature resistance, weather resistance, etc. The phenyl hydrogen-containing silicone oil is suitable to be used as cosmetic additives, lubricant additives, cross-linking agent of electronic pouring sealant and cross-linking agent used for seal rings.

The invention relates to a preparation method for fluorine-containing low-refractivity Yb<3+>-doped quartz glass. The method comprises the steps: starting from a solution, preparing evenly doped silicon oxide powder by using a sol-gel method; and carrying out decarbonization and dehydroxylation treatment on the powder, and finally sintering into glass. By applying the method, F<-> can be effectively introduced, and the rare earth-doped quartz glass with high uniformity, low hydroxyl content and the refractivity almost identical to that of the pure quartz glass can be obtained. The method can be applied to preparation of a high-brightness large-mode-field quartz optical fiber mandril.

A fluorine-containing polyimide optical waveguide material and its preparation method relate to the preparation method of polymer materials in integrated optical devices, which can be applied to waveguide optical devices. The material is obtained by condensation and copolymerization of three monomers, that is, two Fluorine-containing polyimide is obtained by condensation-copolymerization of amine monomer and one dianhydride monomer or condensation-copolymerization of two dianhydride monomers and one diamine monomer. After purification, it is made into fluorine-containing polyimide N-formaldehyde The base pyrrolidone solution was added dropwise to the center of a clean substrate and spin-coated to form a film, dried and cured. The glass transition temperature of the material is greater than 200°C, the optical loss is less than 0.6dB / cm at 1550nm in the optical communication band, and the refractive index at 1550nm is 1.5-1.6. Spin-coat a layer of photoresist on the fluorine-containing polyimide film, after drying, add a mask for masking, photolithography, development, and then etch by reactive ion etching process to remove the remaining photoresist , made of polymer planar waveguide.

The present invention provides a cesium-rubidium-borate nonlinear optical crystal, which is represented by the chemical formula CsxRb1−xB3O5 (0<x<1), and belongs to the P212121 space group with the unit cell parameters in the following range: a=8.202-8.514 Å, b=10.075-9.140 Å, c=5.375-6.207 Å and Z=4. A preparation method of the crystal is as follows: a cesium salt, a rubidium salt and a boron-containing compound are mixed pro rata, heated, kept at a temperature, and then cooled down to obtain the cesium-rubidium-borate. The cesium-rubidium-borate and a flux are mixed and heated to form a melt to obtain a mixing melt. Then a seed crystal attached to a seed rod is dipped into the mixing melt and the seed rod is rotated simultaneously. The melt is kept at 620-780° C., and then cooled down slowly at a rate of 0-5° C. per day. The obtained crystal is drawn out of the melt surface and cooled down to room temperature. Thereby, the cesium-rubidium-borate nonlinear optical crystal is obtained. The crystal can be used for laser light wavelength conversion, optical parametric amplification, electrooptic modulation, optical waveguide and etc.