Method for sinterring porous-glass material, method for manufacturing preform and optical fiber, and porous-glass material
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United States of America Patent
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Issued Date -
May 16, 2002
app pub date -
Nov 14, 2001
filing date -
Nov 16, 2000
priority date (Note) -
Abandoned
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Abstract
A method for sintering a porous-glass material to form a glass base material, which is a base material for an optical fiber, comprising: preparing a ring heater having an opening, through which the porous-glass material passes, for heating the porous-glass material; selecting the porous-glass material having an outer diameter (d) within a predetermined range, the predetermined range being determined based on an inner diameter (D) of the opening of the ring heater; and heating the porous-glass material in an atmosphere of dehydration gas and inert gas with the ring heater.
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