Structure and Optical Properties of Yb3+-Doped Multicomponent Phosphate Glasses PDF Download
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Author: Kuo-chou. Chang
Publisher:
ISBN:
Category :
Languages : en
Pages : 142
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Author: Kuo-chou. Chang
Publisher:
ISBN:
Category :
Languages : en
Pages : 142
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Author: Ru Zhou
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Category :
Languages : de
Pages : 0
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Polyanionic glasses have been investigated as a new group of host materials used for laser gain media in optical fiber applications. The structure of such special glasses is based on ionic crosslinking among the different components, for example, fluoride, nitrite, and sulfate anions, together with suitable cations. By changing the concentration of different anions, it is possible to tailor the heterogeneity and structural connectivity of the glass. In my study, I use flurosulfates, fluorophosphate, and sulfophosphate, as host materials, Ni, Ag, and Ce ions as probe ions, to investigate the structural influence on optical properties of phosphate glass.
Author: Yin-Wen Lee
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ISBN:
Category :
Languages : en
Pages : 120
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Author:
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Category :
Languages : en
Pages : 0
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Author: Austin Lim
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Category : Glass-ceramics
Languages : en
Pages : 166
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"The main objective of this research was to evaluate the properties and structures of glasses from the stannous (SnO) phosphate system for possible use in low temperature optical applications. Glasses in the binary xSnO-(100-x)P2O5 system (50[less than or equal to]x[less than or equal to]70) were prepared and their thermal and optical properties were evaluated. Differences in glass transition temperatures (T[subscript g]) measured here and reported in the literature were explained by differences in the residual water content in the glasses, as determined by infrared spectroscopy. In general, increasing the SnO content of the binary glasses increased the refractive index and the glass transition temperature, and reduced the residual water content, producing glasses that are more chemically stable. Raman spectroscopy showed that the chain-length of the average phosphate anion decreased with increasing SnO content. The addition of B2O3 to a Sn(II)-pyrophosphate base glass (x= 67) improves the aqueous dissolution rate by an order of magnitude. The impact of these compositional changes on the optical and thermal properties depends on how the borate is added. Raman and nuclear magnetic resonance spectroscopies reveal that boron is initially incorporated into the glass network in tetrahedral sites and the pyrophosphate anions are converted to orthophosphate anions. The effects of the addition of Ga2O3 and Sb2O3 on the properties of the tin phosphate glasses were also determined. In general, the addition of these modifying oxides increase the glass transition temperature from around 250°C to 350°C, and the refractive index (nD) was in the range 1.75-1.85, depending on glass composition. The chemical durability of these modified glasses was similar to those modified by B2O3-additions. Raman spectroscopy revealed the formation of isolated orthophosphate anions in the formation of Ga (Sb)-O-P glass networks"--Abstract, leaf iv.
Author: Nur Asilah Mohamad Zulkifeli
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ISBN:
Category : Glass
Languages : en
Pages : 90
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Author: Donald Robert Uhlmann
Publisher:
ISBN:
Category : Glass
Languages : en
Pages : 280
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Seven independently-authored chapters consider selected topics related to the rapidly growing interest in optical glass among scientists who were hitherto satisfied with opaque ceramics. They cover oxide, halide, and photochromic glasses; nonlinear optical properties; optical basicity; optical fiber
Author: James Merle Harris
Publisher:
ISBN:
Category : Glass
Languages : en
Pages : 134
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Author: J. M. Arzeian
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Category :
Languages : en
Pages :
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Author: Poh Sum Wong
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ISBN:
Category :
Languages : en
Pages : 132
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