发明名称 |
Optical fiber and fiber grating type filter including the same |
摘要 |
The present invention relates to an optical fiber having a structure which allows further improvements to be made both in terms of lower reflectance and narrower bandwidth, and to a fiber grating type filter including the optical fiber. The optical fiber applied to the fiber grating type filter comprises a core region extending along a predetermined axis, and a cladding region provided on an outer periphery of the core region. The core region does not contain any photosensitive dopant which contributes to predetermined wavelength light photosensitivity as a glass property, but a part of the cladding region contain such a photosensitive dopant. By means of this composition, it is possible to form a grating, which has a grating plane slanted by a predetermined angle with respect to the optical axis, in a part of the cladding region surrounding the core region.
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申请公布号 |
US2004151467(A1) |
申请公布日期 |
2004.08.05 |
申请号 |
US20030747085 |
申请日期 |
2003.12.30 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
ISHIKAWA SHINJI;TARU TOSHIKI;SHIGEHARA MASAKAZU;OHMURA MASAKI |
分类号 |
G02B6/02;G02B6/028;G02B6/036;(IPC1-7):G02B6/00 |
主分类号 |
G02B6/02 |
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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