发明名称 |
Optical fiber, optical transmission line, optical module and optical transmission system |
摘要 |
The present invention relates to an optical fiber which has a structure for further increasing an FOM (=|dispersion|/loss) and which can be applied to a dispersion compensation module. The optical fiber is mainly composed of silica glass and has a core region including a center of an optical axis, a depressed region surrounding the core region, a ring region surrounding the depressed region, and a cladding region surrounding the ring region and doped with F. As compared with the refractive index of pure silica glass, a relative refractive index difference of the core region is 3% or more but 4% or less, a relative refractive index difference of the depressed region is -1% or more but -0.5% or less, a relative refractive index difference of the ring region is 0.01% or more but 0.24% or less, and a relative refractive index difference of the cladding region is -0.3% or more but -0.1% or less. The FOM at the wavelength of 1550 nm is 250 ps/nm/dB or more.
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申请公布号 |
US7286740(B2) |
申请公布日期 |
2007.10.23 |
申请号 |
US20060544007 |
申请日期 |
2006.10.06 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
SASAKI TAKASHI;MAKIHARA KAZUMASA;HARUNA TETSUYA;ONISHI MASASHI;HIRANO MASAAKI |
分类号 |
G02B6/02;G02B6/00;G02B6/028;G02B6/036 |
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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