| 发明名称 |
PREPARATION OF MOTHER MATERIAL FOR OPTICAL FIBER |
| 摘要 |
PURPOSE:To prevent formation of small foams between soot layers at the time of sintering by decreasing the amount of B2 O3 doped gradually from the inner side toward the exterior side in preparing the second soot layer smaller in amount of B2 O3 doped than in the first soot layer for clad. |
| 申请公布号 |
JPS531540(A) |
申请公布日期 |
1978.01.09 |
| 申请号 |
JP19760075722 |
申请日期 |
1976.06.26 |
| 申请人 |
NIPPON TELEGRAPH & TELEPHONE;FUJIKURA LTD |
发明人 |
IZAWA TATSUO;SHIODA TAKAO;OSANAI YUTAKA;FUKUDA TAKERU;SANADA KAZUO;AKIYAMA MICHIO |
| 分类号 |
C03B37/018;C03B37/014;G02B6/00 |
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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