Shin-Etsu Chemical Co., Ltd.

Other

Hiroshi Machida

Tadakatsu Shimada

Hideo Hirasawa

Yuuji Tobisaka

Masataka Watanabe

Hiroshi Tsumura

The method of manufacturing porous glass base material for optical fiber includes that flame-hydrolyzing raw materials for glass in oxyhydrogen flame, depositing the generated glass fine particles on a rotating target to form porous glass base material, dehydrating and sintering the porous glass base material to transform into clear glass. The method features, in terms of the surface temperature of said porous glass base material, which changes as the burner used for depositing glass fine particle is moved relatively to said target, the temperature difference between the surface temperature of the porous glass base material touching the burner flame Ta and the surface temperature of the porous glass base material before touching the flame Tb, that is Ta&#x2212;Tb, is adjusted to be within the range from 200 to 700 degrees centigrade.

Method of manufacturing porous glass base material used for optical fibers, and glass base material

An apparatus for manufacturing a glass base material, which is a base material of an optical fiber, comprising: a base rod, around and along which said glass base material is formed; a burner that hydrolyzes and accumulates a gas material, which is a base material of said glass base material, around and along said base rod; a first burner-moving-unit that moves said burner in a direction parallel with a longitudinal direction of said base rod; and a second burner-moving-unit that moves said first burner-moving-unit in a same moving direction of said first burner-moving-unit.

Glass base material manufacturing apparatus and glass base material manufacturing method

OVD apparatus including air-regulating structure

Glass base material manufacturing apparatus with super imposed back-and-forth burner movement

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Annaka, Japan

Hiroshi Machida