发明名称 |
Production method for a polarization maintaining optical fiber preform |
摘要 |
The present invention provides a polarization maintaining optical fiber of which polarization crosstalk characteristic is not deteriorated after fusing two or more polarization maintaining optical fibers, and provides a method for producing a preform thereof. The polarization maintaining optical fiber includes two stress applying portions disposed in a cladding around a core, in which an angle formed by a line connecting the center of one of the stress applying portions with the center of the core and a line connecting the center of the other stress applying portion with the center of the core is 3 degrees or less. The preform is produced by forming one insertion hole in a cladding element and then rotating the preform 180 degrees around a core element without moving the drilling tool, followed by forming the other insertion hole in the cladding element and then inserting stress applying elements into the insertion holes. |
申请公布号 |
EP1248122(B1) |
申请公布日期 |
2004.01.14 |
申请号 |
EP20020290574 |
申请日期 |
2002.03.07 |
申请人 |
FUJIKURA LTD. |
发明人 |
INABA, TADAYUKI;EMORI, SHIGERU;SHAMOTO, NAOKI;HIMENO, KUNIHARU |
分类号 |
G02B6/00;C03B37/012;G02B6/024;G02B6/10;(IPC1-7):G02B6/10 |
主分类号 |
G02B6/00 |
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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