发明名称 |
METHOD OF MANUFACTURING OPTICAL FIBER PREFORM, AND OPTICAL FIBER |
摘要 |
The present invention relates to a preform manufacturing method and others for effectively reducing variation in refractive index due to chlorine used in manufacture of an optical fiber preform. The manufacturing method includes a dechlorination step carried out between a point of an end time of a dehydration step and a point of a start time of a sintering step, the dechlorination step being a step of heating a porous preform after dehydrated, in an atmosphere containing no chlorine-based dehydrating agent, for a given length of time while maintaining a temperature lower than a sintering temperature, thereby removing chlorine from the porous preform after dehydrated. |
申请公布号 |
US2014140673(A1) |
申请公布日期 |
2014.05.22 |
申请号 |
US201314065599 |
申请日期 |
2013.10.29 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
YONEZAWA KAZUHIRO;ENOMOTO TADASHI |
分类号 |
C03B37/014;G02B6/02;G02B6/028 |
主分类号 |
C03B37/014 |
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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