Structural peculiarities of phosphate glasses for fiber optic applications

被引：1

作者：

Anan'ev, A ^{[1
]}

Bogdanov, V ^{[1
]}

Maksimov, L ^{[1
]}

Rusan, V ^{[1
]}

Smerdin, S ^{[1
]}

Yanush, O ^{[1
]}

机构：

[1] State Opt Inst, St Petersburg 193171, Russia

来源：

OPTICAL MATERIALS AND APPLICATIONS | 2005年 / 5946卷

关键词：

glass; light scattering losses; fluctuations; ultrasonic velocity;

D O I：

10.1117/12.639054

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Alkali phosphate, phosphate-silicate, and phosphate-germanate glasses were studied by means of high-temperature acoustics and Rayleigh-Mandelstam-Brillouin (RMBS) and Raman scattering (RS) spectroscopies. Temperature-temporal dependences of the ultrasound velocity in the glass melts were measured at temperatures up to 1550 degrees C. From the RMBS spectra the Landau-Placzek ratio and frequency shifts were found. A theory of the fluctuations freezing at the cooling of the glass melt was applied to separate the contributions of the frozen-in density and concentration fluctuations to the Rayleigh scattering losses. A comparison was drawn with the losses in silica glass. The RS spectra allowed the identification of the constant-stoichiometry groups. The feasibility of the system xNa(2)O-(40 - x)K2O-30Al(2)O(3)-30P(2)O(5) for the fabrication of low-scattering glasses was ascertained.

引用

页数：9

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