Method for producing glass preform for optical fiber,申请号US19870016354-传众专利搜索

Method for producing glass preform for optical fiber

申请公布号：US4781740(A)

申请号：US19870016354

申请日期：1987.02.19

申请公布日期：1988.11.01

申请人：

SUMIMOTO ELECTRIC INDUSTRIES, LTD.

发明人：DANZUKA, TOSHIO;YOKOTA, HIROSHI;ISHIGURO, YOICHI

分类号：G02B6/00;C03B37/014;C03B37/018;(IPC1-7):C03B37/018

主分类号：G02B6/00

摘要：A method for producing a glass preform for an optical fiber comprising jetting SiCl4 as a glass-forming raw material and an insert gas from a first nozzle of a multi-nozzle burner and, as another glass-forming raw material, at least one hydrogen-containing silicon compound with larger oxidation or hydrolysis reaction heat than that of SiCl4 selected from the group consisting of SiHCl3, SiH2Cl2, SiH3Cl and SiH4 from a second nozzle surrounding the first nozzle, flame hydrolyzing or oxidizing the glass-forming raw materials to synthesize glass soot particles, depositing the glass soot particles on a starting member to form a porous soot preform with a controlled bulk density distribution and heating and sintering the soot preform to obtain a transparent glass preform, by which a large glass preform is stably produced without cracking.