发明名称 |
Preparation of semifinished product for manufacture of optical fibers |
摘要 |
A process is described for making a doped-silica ingot useful in the manufacture of optical fibers. At least a silicon compound and a titanium compound are decomposed in the flame of the induction plasma burner in the presence of a determined supply of hydrogen and are reacted with the oxygen contained in the burner feed gas and/or in the vector gas to form SiO2 and H2O against a heat-stable support. As a result silica and titanium oxide are deposited on the support in the form of a homogeneous vitreous mass exhibiting a selected concentration of hydroxyl groups between 10 and 50 parts per million. Fluorine-doped silica is deposited radially in the same way on the resulting ingot. The resulting semifinished product is a cylinder consisting of a titanium-doped silica core, whose TiO2 concentration by weight is about 0.1 to 8%, covered by a sheath of fluorine-doped silica, whose fluorine concentration is about 0.1 to 3%.
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申请公布号 |
US4367013(A) |
申请公布日期 |
1983.01.04 |
申请号 |
US19810233512 |
申请日期 |
1981.02.11 |
申请人 |
QUARTZ & SILICE |
发明人 |
GUERDER, PIERRE;RANSON, ANDRE |
分类号 |
C03B37/014;C03B37/018;C03C13/04;G02B6/00;(IPC1-7):C03B19/00;C03B37/07;G02B5/14 |
主分类号 |
C03B37/014 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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