| 发明名称 |
METHOD OF MANUFACTURING PREFORMS FOR OPTICAL FIBRES HAVING LOW WATER PEAK |
| 摘要 |
A method of manufacturing an optical fibre preform comprising: providing a glass core rod comprising a central core region of radius a and an inner clad region of external radius b to define a first core-to-clad ratio a/b; forming an intermediate glass preform comprising an intermediate clad region surrounding the inner clad region of the glass rod and having an external radius c to define a second core-to-clad ratio a/c, and overcladding the intermediate glass preform by forming an overclad region surrounding the intermediate clad region to form an optical fibre preform, wherein the first core-to-clad ratio a/b is equal to or less than 0.40 and the second core-to-clad ratio a/c is of from 0.20 to 0.25. |
| 申请公布号 |
US2015336840(A1) |
申请公布日期 |
2015.11.26 |
| 申请号 |
US201214758018 |
申请日期 |
2012.12.28 |
| 申请人 |
PRYSMIAN S.P.A. |
发明人 |
Adigrat Antonio;Caronna Valeria;Cocchini Franco;Collaro Antonio;Grieco Stefano;Nivelli Ida |
| 分类号 |
C03B37/018;C03B37/027 |
主分类号 |
C03B37/018 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method of manufacturing an optical fibre preform comprising:
providing a glass core rod comprising a central core region of radius a and an inner clad region of external radius b to define a first core-to-clad ratio a/b; forming an intermediate glass preform comprising an intermediate clad region surrounding the inner clad region of the glass rod and having an external radius c to define a second core-to-clad ratio a/c, and overcladding the intermediate glass preform by forming an overclad region surrounding the intermediate clad region to form an optical fibre preform, wherein the first core-to-clad ratio a/b is equal to or less than 0.40 and the second core-to-clad ratio a/c is of from 0.20 to 0.25. |
| 地址 |
Milano IT |
