发明名称 |
PROCESS FOR PRODUCING OPTICAL FIBRES HAVING A RADIAL GRADIENT INDEX OF REFRACTION |
摘要 |
A process for the manufacture of a glass blank in the form of a rod from which the optical fibre is drawn, said blank being produced starting from a molten bath of glass. A first stage of the process comprises melting a mixture of starting materials having a higher impurity content (<10-4) in the form of so-called transition metals then the final blank (<10-7). A second stage consists in inducing separation into two solid phases (a hard phase rich in silica and a soft phase poor in silica) by drawing the blank from the bath of molten glass and by subsequently subjecting it to a thermal annealing treatment. This is followed by deep etching and by peripheral etching to eliminate the soft phase and its impurities to different extents as a function of depth, which creates a radial refractive index gradient and an optical cladding. |
申请公布号 |
DE2961122(D1) |
申请公布日期 |
1981.12.10 |
申请号 |
DE19792961122 |
申请日期 |
1979.05.16 |
申请人 |
THOMSON-CSF |
发明人 |
DE PANAFIEU, ARNAUD;BAYLAC, CHRISTIANE;NEMAUD, YVES;TURPIN, MARC;FAURE, MICHEL |
分类号 |
C03B37/014;C03C3/089;C03C13/04;C03C15/00;C03C23/00;G02B6/00;G02B6/028;(IPC1-7):C03B37/02;C03C13/00;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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