发明名称 |
OPTICAL FIBER, MANUFACTURING METHOD OF OPTICAL FIBER, AND OPTICAL AMPLIFIER |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical fiber capable of inexpensively and comparatively easily injecting excitation light with constant intensity into a multi-core rare earth element-added optical fiber on a cross section of the optical fiber, and an optical amplifier using the same. <P>SOLUTION: An optical fiber comprises: a plurality of cores 10 which do not substantially contain a rare earth element; a first clad 20 which surrounds the peripheries of the plurality of cores 10; and a second clad 30 which surrounds the periphery of the first clad 20. The first clad 20 has a lower refractive index than any core 10 of the plurality of cores 10, and the second clad 30 has a higher refractive index than the first clad 20. <P>COPYRIGHT: (C)2013,JPO&INPIT |
申请公布号 |
JP2013033863(A) |
申请公布日期 |
2013.02.14 |
申请号 |
JP20110169427 |
申请日期 |
2011.08.02 |
申请人 |
MITSUBISHI CABLE IND LTD |
发明人 |
TANAKA MASATOSHI;TANIGUCHI KOICHI;OIZUMI SEIRO;YAMAMOTO TETSUYA;HASHIMOTO MAMORU;SAWADA HISASHI;KINOSHITA TAKAAKI;HACHIWAKA MASAYOSHI;ISHIDA TOMOHIKO;KUSUNOKI SHUICHI |
分类号 |
H01S3/067;C03B37/012;G02B6/04;H01S3/10 |
主分类号 |
H01S3/067 |
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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