发明名称 |
Optical fiber grating element, production method, and optical fiber filter |
摘要 |
The present invention relates to an optical fiber grating element having structure enabling more precise design and fabrication, a production method thereof, and an optical fiber filter including the same. The optical fiber grating element according to the present invention comprises a multi-mode optical fiber having a first core region of a refractive index n1, a second core of a refractive index n2 provided on a periphery of the first core region, and a cladding region of a refractive index n3 provided on a periphery of the second core region, and having a cutoff wavelength regarding to LP02-mode light on the longer wavelength side than a wavelength band in use. A long-period grating for selectively coupling the fundamental LP01-mode light of a predetermined wavelength in the wavelength band I use to LP0m (m>=2)-mode light is provided in a predetermined region of the first core region.
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申请公布号 |
US6487340(B2) |
申请公布日期 |
2002.11.26 |
申请号 |
US20010903763 |
申请日期 |
2001.07.13 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
ENOMOTO TADASHI;ISHIKAWA SHINJI;SHIGEHARA MASAKAZU;TAKUSHIMA MICHIKO |
分类号 |
G02B6/14;G02B6/26;G02B6/34;(IPC1-7):G02B6/34 |
主分类号 |
G02B6/14 |
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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