发明公开
EP1441244A1 POLARIZATION PRESERVING OPTICAL FIBER AND ABSOLUTE SINGLE POLARIZATION OPTICAL FIBER
有权
绝对消费者利益相关者利益相关者（LICHTWELLENLEITER）
- 专利标题： POLARIZATION PRESERVING OPTICAL FIBER AND ABSOLUTE SINGLE POLARIZATION OPTICAL FIBER
- 专利标题（中）： 绝对消费者利益相关者利益相关者（LICHTWELLENLEITER）
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申请号： EP02768087.5申请日： 2002-09-26
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公开(公告)号： EP1441244A1公开(公告)日： 2004-07-28
- 发明人: KAWANISHI, Satoki , SUZUKI, Kazunori , KUBOTA, Hirokazu , TANAKA, Masatoshi, c/o MITSUBISHI CABLE IND. LTD. , FUJITA, Moriyuki, MITSUBISHI CABLE. IND. LTD.
- 申请人： Nippon Telegraph and Telephone Corporation , Mitsubishi Cable Industries, Ltd.
- 申请人地址： 3-1, Otemachi 2-chome, Chiyoda-ku Tokyo 100-8116 JP
- 专利权人： Nippon Telegraph and Telephone Corporation,Mitsubishi Cable Industries, Ltd.
- 当前专利权人： Nippon Telegraph and Telephone Corporation,Mitsubishi Cable Industries, Ltd.
- 当前专利权人地址： 3-1, Otemachi 2-chome, Chiyoda-ku Tokyo 100-8116 JP
- 代理机构： Leson, Thomas Johannes Alois, Dipl.-Ing.
- 优先权： JP2001297979 20010927
- 国际公布： WO2003029854 20030410
- 主分类号： G02B6/16
- IPC分类号： G02B6/16 ; G02B6/00
摘要：
A polarization-maintaining optical fiber and absolutely single-polarization optical fiber are provided which enable long distance transmission maintaining a polarization state of signal light. The polarization-maintaining optical fiber includes a core (11), photonic crystal cladding (12) and jacket (13). The photonic crystal cladding (12) is divided into four segments (12a, 12b, 12c and 12d) by broken lines from the center to the periphery. Among a plurality of grating holes in a pair of segments (12a and 12c) opposed to each other with respect to the core (11), the diameter (d2) of grating holes (14a and 14c) close to the core (11) is greater than the diameter (d1) of grating holes in another pair of segments (12b and 12d) opposed with each other, and than a grating constant (Λ).
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