Method for manufacturing optical fiber preform and burner...

Details Method for manufacturing optical fiber preform and burner... Method for manufacturing optical fiber preform and burner...

2006-07-11

2006-07-11

Vincent, Sean (Department: 1731)

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

Process of manufacturing optical fibers, waveguides, or...

C065S415000, C065S421000

Reexamination Certificate

active

07073354

ABSTRACT:
The present invention provides an optical fiber preform manufacturing method and a burner apparatus employed for this method. In this manufacturing method, when glass particles are synthesized in an oxy-hydrogen flame emitted from a burner to form a porous optical fiber preform by depositing glass particles in the radial direction of a starting member, the relationship between the flow rate vm (m/sec) of a source material gas or a mixed gas of the source material gas and an additive gas discharged from the burner, and the flow rate vs (m/sec) of an inert gas is such that −0.06 vm+1.4≦vs≦−0.02 vm+1.8, and vs≧0.40, while the relationship between the flow volume Vm (1/min) of the source material gas discharged from the burner and the flow volume Vs (1/min) of the inert gas is such that Vs/Vm≦0.2.

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