Method for producing glass preform for optical fiber

Details Method for producing glass preform for optical fiber Method for producing glass preform for optical fiber

1985-01-23

1986-09-09

Schor, Kenneth M.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 182, 65DIG16, C03B 37018, C03B 37014

Patent

active

046107096

ABSTRACT:
Fluorine is selectively added to a cladding portion of a glass preform by producing a soot preform which comprises a core portion and a cladding portion under such conditions that an additive concentration or a bulk density of the outermost part of the core portion is to be larger than that of the inner part thereof and heating the soot preform in an atmosphere containing fluorine or fluorine-containing compound at least for some period to obtain a transparent glass preform.

REFERENCES:
patent: 3806224 (1974-04-01), MacChesney
patent: 4165223 (1979-08-01), Powers

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