Shin-etsu Chemical Co., Ltd.

Kazuhisa Hatayama

Tadakatsu Shimada

Hideo Hirasawa

Yuuji Tobisaka

Masataka Watanabe

Waichi Yamamura

Yoshiaki Shimizu

Jiro Moriya

Mitsukuni Sakashita

Minoru Taya

Shinji Suzuki

Takaaki Nagano

Hiroyuki Koide

Hiroshi Tsumura

Go Ogino

A glass base material manufacturing apparatus for manufacturing a glass base material comprising: a plurality burners, arranged in a row at a predetermined intervals along the longitudinal direction of a starting base material of the glass base material, for forming a deposit, which is a base material of the glass base material by depositing glass soot on the starting base material while moving reciprocatory over a section of the entire length of the starting base material along the longitudinal direction of the starting base material; a plurality of flow rate regulators, at least one of which is connected to the plurality of burners, respectively, for regulating a flow rate of raw material gas of the glass soot, which is supplied to the plurality of burners; and a control unit connected to each of the plurality of flow rate regulators for controlling individually the plurality of flow rate regulators.

Method of making glass base material

Glass base material producing device

A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like form by further heating the preform to generate the optical fiber.

Optical fiber manufacture method, preform manufacture method, and preform manufacture apparatus

Method of making an optical fiber preform where a second elongation is based on a mark on a glass rod

An apparatus for manufacturing a glass base material which is an parent material of an optical fiber, comprising: a tank which contains a raw material of the glass base material to vaporize the raw material to generate a raw material in gas phase; a temperature control unit which controls a temperature of the raw material; and a pressure control unit which controls the pressure of the raw material in gas phase.

Apparatus for manufacturing glass base material and a method for manufacturing glass base material

Optical fiber manufacture method including elongating a preform in a vertical direction and a horizontal direction

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Annaka, Japan

Kazuhisa Hatayama