发明名称 |
Optical transmission system, optical repeater, and optical transmission method |
摘要 |
In a WDM transmission system employing a plurality of short wavelength bands having great attenuation due to optical fiber transmission, an optical repeater is constructed of a first multiplexing section and a second multiplexing section. The first multiplexing section is used for wavelength-multiplexing both the excitation light from a first Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The second multiplexing section is used for wavelength-multiplexing both the excitation light from a second Raman excitation light source, which distributively amplifies an S+ band included in light propagating through an optical fiber, and the light propagating through the optical fiber. The first and second multiplexing sections are provided between the optical fibers disposed between end offices. Thus an equal and satisfactory optical SN ratio even at any band are obtained.
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申请公布号 |
US7075709(B2) |
申请公布日期 |
2006.07.11 |
申请号 |
US20020103690 |
申请日期 |
2002.03.25 |
申请人 |
FUJITSU LIMITED |
发明人 |
NAKAMURA KENTARO;TERAHARA TAKAFUMI;HAINBERGER RAINER;KUMASAKO JUNICHI |
分类号 |
G02F1/35;H01S3/00;H01S3/06;H01S3/10;H01S3/23;H01S3/30;H04B10/02;H04B10/16;H04B10/17;H04B10/18;H04J14/00;H04J14/02 |
主分类号 |
G02F1/35 |
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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