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专利名称：Optical fiber for optical amplifier发明人：Keiichi Aiso申请号：US11030147申请日：20050107公开号：US074679B2公开日：20081216
专利附图：
摘要：By optimizing the refractive index profile, the absorption coefficient of a rareearth element doped optical fiber can be enlarged and nonlinear effect can be
suppressed. Thus, according to the present invention, the optical fiber, which is suitablefor wide band optical amplification, can be realized. Moreover, in the present invention,
the optical fiber of W-shape profile comprising a core, the first cladding having arefractive index smaller than that of said core surrounding said core, and the secondcladding having a refractive index smaller than that of said core and larger than that ofsaid first cladding surrounding said first cladding is prepared and are suitable for thewide band optical amplification. That is, since in the rare earth element optical fiber ofthis W-shape profile, both the absorption coefficient of a rare earth element, and theabsolute value of chromatic dispersion can be increased greatly as compared to theoptical fiber of the conventional step index profile and nonlinear effect can besuppressed more efficiently, an optical fiber which is suitable for further wide bandoptical amplification, is realizable.
申请人：Keiichi Aiso
地址：Tokyo JP
国籍：JP
代理机构：Robinson Intellectual Propery Law Office, P.C.
代理人：Eric J. Robinson
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