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Advanced manufacturing and high-quality materials
Published in Natalia Yakovleva, Edmund Nickless, Routledge Handbook of the Extractive Industries and Sustainable Development, 2022
Kazuyo Matsubae, Eiji Yamasue, Hisao Ohtake
The demand for high-purity phosphate for use as a lens material has also been increasing. The fluorophosphate glass lens used in smartphones and tablets is manufactured by mixing a metal fluoride and phosphate, and by molding the vitrified glass. The surge in demand for fluorophosphate glass is due to its superior optical properties, which far exceed the performance of plastic lenses and silicate glass. To prevent the lens from discoloration and to limit absorbance to specific wavelengths, the demand is growing for high-purity phosphoric acid with few impurities for the manufacture of fluorophosphate glass.
Organic Materials for Third-Order Nonlinear Optics
Published in Hari Singh Nalwa, Seizo Miyata, Nonlinear Optics of Organic Molecules and Polymers, 2020
where L"? = 1.064 ?m; /(3?)and ??)are the intensities of THG and pump beam, respectively. From this relationship, the ?(3>value of the composite was 5 X 10" esu. The laser-induced fluorescence studies indicate the three-photon excitation fluorescence. The advantages offered by lead-tin fluorophosphate glass are its low melting point, high optical quality, and durability. The molecules of acridine yellow dye are randomly oriented in the host matrix and held rigidly. In the case of THG, both bulk and surface enhancements contribute to large ?'31 values.
Bulk Glasses
Published in Marvin J. Weber, and TECHNOLOGY, 2020
The fluorophosphate glass has the lowest nonlinear refractive index (n2) of any glass listed. This will allow the glass to be used at higher laser powers without experiencing “self-focusing, which will produce catastrophic damage to the glass. The thermal optical distortion for this glass is also very low.
Luminescence and decay characteristics of Tb3+-doped fluorophosphate glasses
Published in Journal of Asian Ceramic Societies, 2018
K. Linganna, Seongmin Ju, Ch. Basavapoornima, V. Venkatramu, C. K. Jayasankar
The physical parameters were calculated for 1.0 mol% Tb3+-doped fluorophosphate glass. The density was measured by Archimedes’ method using water as an immersion liquid and found to be 2.890 g/cm3. The refractive index was determined to be 1.576 at sodium wavelength (589.3 nm) using Abbe refractometer with 1-bromonapthalene as contact liquid. The concentration was calculated to be 2.778 × 1020 ions/cm3. Luminescence, excitation and decay curves of Tb3+-doped glasses were recorded using Jobin-Yvon Fluorolog-3 spectrofluorimeter with Xe arc lamp as an excitation source (450 W). All these measurements were carried out at room temperature.