Method and device for manufacturing optical preforms, as...

Optical waveguides – Optical fiber waveguide with cladding

Reexamination Certificate

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Details

C065S391000, C118S72300R, C427S248100

Reexamination Certificate

active

07734135

ABSTRACT:
The present invention relates to a method and a device for manufacturing optical performs, in which one or more layers of glass, doped or undoped, are deposited onto the internal surface of a hollow substrate tube, which deposition is effected by supplying one or more reactive gas mixtures of glass-forming compounds tot the interior of the hollow substrate tube and subsequently generating a non-isothermal plasma in the hollow substrate tube, after which the preform is subjected to a contraction process for the purpose of forming a massive rod, from which optical fibres are drawn.

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