发明名称 |
Optical transmission line |
摘要 |
In order to expand the product between the transmission length and the transmission bandwidth of an optical fiber for use in the optical communication and to facilitate the connection between the optical fibers, the optical fiber is made of transparent materials of three concentric layers of a core whose refractive index gradually decreases in the radial direction from the center, an intermediate layer which has a uniform refractive index lower than the varying refractive index of the core, and a cladding which has a uniform refractive index substantially equal to the lowest refractive index of the core.
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申请公布号 |
US4185890(A) |
申请公布日期 |
1980.01.29 |
申请号 |
US19760734310 |
申请日期 |
1976.10.20 |
申请人 |
HITACHI LTD |
发明人 |
ISHIDA, KOJI;ONODA, SEIICHI;SUGANUMA, TSUNEO;SUMI, MASAO;TANAKA, TOSHIKI P |
分类号 |
G02B6/028;G02B6/036;(IPC1-7):G02B5/14 |
主分类号 |
G02B6/028 |
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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