发明名称 |
METHOD AND APPARATUS OF PRODUCING OPTICAL FIBER PREFORM |
摘要 |
A method of producing optical fiber preform includes: forming a deposited layer by depositing glass particles on a periphery of a target element in a deposition mode while burning a mixed gas containing a glass source material gas, a flaming gas, and a supporting gas by use of a flaming burner; maintaining a state where the supporting gas flows at a flow velocity greater than or equal to a flow velocity at which a nozzle end of the supporting gas discharge nozzles does not glow while maintaining a pilot burner by allowing the flaming gas to flow to the seal gas discharge nozzle after a seal gas is replaced with the flaming gas in a case where a mode is changed from the deposition mode to a non-deposition mode; and replacing the flaming gas flowing to the flaming gas port with a purge gas. |
申请公布号 |
US2012279259(A1) |
申请公布日期 |
2012.11.08 |
申请号 |
US201213461374 |
申请日期 |
2012.05.01 |
申请人 |
YAMADA NARITOSHI;HIRAFUNE SHUNICHIROU;FUJIKURA LTD. |
发明人 |
YAMADA NARITOSHI;HIRAFUNE SHUNICHIROU |
分类号 |
C03B37/018 |
主分类号 |
C03B37/018 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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