| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of fabricating an optical fiber preform, capable of depositing glass particles with high deposition rate without reducing deposition efficiency and fabricating an optical fiber preform having little bubbles. <P>SOLUTION: In the invention, a mixed gas of a glass raw material gas with a combustion assisting gas is ejected from an annular nozzle N3 of a burner having a coaxially multiple tube structure, and a burnable gas is ejected from a nozzle N1 located inside the annular nozzle N3. Alternatively, a mixed gas of a glass raw material gas with a burnable gas may be ejected from an annular nozzle N3, and a combustion assisting gas is ejected from an inner nozzle N1 located inside the annular nozzle N3. In each case, of the above, the burnable gas and the combustion assisting gas, respectively, are ejected from respective nozzles N5, N7 located outside the annular nozzle N3. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
