Optical fiber for amplification, optical amplifyin

专利名称：Optical fiber for amplification, optical

amplifying apparatus, light sourceapparatus, photo-therapy apparatus, andexposure apparatus

发明人：Masahiro Takagi,Motoki Kakui,Akira

Tokuhisa,Soichi Owa

申请号：US11130410申请日：20050517公开号：US07369731B2公开日：20080506

专利附图：

摘要：The present invention relates to an optical fiber for amplification, an opticalamplifying apparatus, and so on, having a structure for enabling increase of power ofoutput light, suppression of occurrence of nonlinear optical phenomena, and compactstorage all together. The optical amplifying apparatus comprises an optical fiber foramplification amplifying input light inputted together with pumping light from a pumpinglight source. The optical fiber for amplification comprises a core region doped with arare-earth element, and a cladding region provided on an outer periphery of the coreregion and having a refractive index lower than that of the core region. The core regionhas an outer diameter of 10 μm or more but 30 μm or less, and has a relative refractiveindex difference of 0.5% or more but 2.0% or less with respect to the cladding region.The cladding region has an outer diameter of 75 μm or more but 200 μm or less.

申请人：Masahiro Takagi,Motoki Kakui,Akira Tokuhisa,Soichi Owa

地址：Yokohama JP,Yokohama JP,Tokyo JP,Kumagaya JP

国籍：JP,JP,JP,JP

代理机构：McDermott Will & Emery LLP

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