| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical fiber preform production method whereby when a porous glass body is formed into a starting member, the porous glass body can be prevented from being broken or separated. SOLUTION: Before glass microparticles are deposited on a starting member 1, the starting member 1 is preheated to a temperature higher than the steady-state glass deposition temperature by at least 100°C and equal to or lower than 1,500°C. It is desirable that burners 3, 4, and 5 used for the deposition of the glass microparticles are used as the sources for the preheating. At this time, it is desirable that the preheating of the entire starting member 1 is continued just before the start of deposition of the glass microparticles by performing the preheating by means of the respective burners. COPYRIGHT: (C)2005,JPO&NCIPI
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