公开(公告)号：US08774590B2

公开(公告)日：2014-07-08

申请号：US13097563

申请日：2011-04-29

申请人： Kentaro Ichii ,  Shoji Tanigawa ,  Tomofumi Arai

发明人： Kentaro Ichii ,  Shoji Tanigawa ,  Tomofumi Arai

IPC分类号： G02B6/02 ,  H01S3/067 ,  H01S3/16

CPC分类号： H01S3/06716 ,  C03C2201/28 ,  H01S3/06733 ,  H01S3/06754 ,  H01S3/1618 ,  H01S3/1693 ,  H01S3/175 ,  H01S3/302

摘要： Provided is an ytterbium-doped optical fiber including a core containing at least ytterbium, aluminum and phosphorous and a clad surrounding the core, wherein a molar concentration of diphosphorus pentoxide with respect to phosphorus in the core is equal to a molar concentration of aluminum oxide with respect to aluminum in the core, wherein a ratio of a molar concentration of diphosphorus pentoxide with respect to phosphorus in the core to the molar concentration of ytterbium oxide with respect to ytterbium in the core is higher than or equal to 10 and lower than or equal to 30, and wherein a relative refractive index difference between the core and the clad is higher than or equal to 0.05% and lower than or equal to 0.30%.

摘要翻译： 提供了一种掺镱光纤，其包括至少含有镱，铝和磷的芯和围绕芯的包层，其中五氧化二磷相对于芯中的磷的摩尔浓度等于氧化铝与 相对于芯中的铝，其中五氧化二磷的摩尔浓度相对于芯中的磷的比例相对于芯中的镱的氧化镱的摩尔浓度的比例高于或等于10并且小于或等于 至30，并且其中所述芯和所述包层之间的相对折射率差高于或等于0.05％且低于或等于0.30％。

公开(公告)号：US08125705B2

公开(公告)日：2012-02-28

申请号：US12474936

申请日：2009-05-29

申请人： Kentaro Ichii ,  Hideyuki Hosoya

发明人： Kentaro Ichii ,  Hideyuki Hosoya

IPC分类号： H01S3/00

CPC分类号： H01S3/06716 ,  H01S3/0014 ,  H01S3/094007 ,  H01S3/0941 ,  H01S3/1618 ,  H01S3/1693

摘要： A processing method for suppressing photodarkening in an Yb-doped optical fiber, comprising: a first step of preparing the Yb-doped optical fiber by doping a core with Yb, and irradiating at least one of a gamma ray, a X-ray, or an electron beam onto the Yb-doped optical fiber with an energy greater than a light to be transmitted through the optical fiber when a laser is being oscillated; a second step of measuring a loss spectrum of an infrared region of the optical fiber after the first step, and selecting an optical fiber with the loss in a specific wavelength falling within a predetermined range; and a third step of treating the optical fiber selected in the second step in an atmosphere containing hydrogen to obtain an Yb-doped optical fiber with suppressed photodarkening.

摘要翻译： 一种用于抑制掺Yb光纤中的光暗化的处理方法，包括：第一步骤，通过用Yb掺杂核制备掺杂Yb的光纤，并且照射γ射线，X射线或 当激光器振荡时，具有大于待透射通过光纤的光的能量的Yb掺杂光纤上的电子束; 第二步骤，在第一步骤之后测量光纤的红外区域的损耗谱，并选择特定波长的损耗落在预定范围内的光纤; 以及在包含氢的气氛中处理在第二步骤中选择的光纤以获得具有抑制的光暗化的Yb掺杂光纤的第三步骤。

公开(公告)号：US20100079854A1

公开(公告)日：2010-04-01

申请号：US12631621

申请日：2009-12-04

申请人： Shoji Tanigawa ,  Kentaro Ichii

发明人： Shoji Tanigawa ,  Kentaro Ichii

IPC分类号： H01S3/094 ,  G02B6/036 ,  H01S3/067

CPC分类号： G02B6/02033 ,  G02B6/03605 ,  G02B6/0365 ,  G02B6/03661 ,  H01S3/06716 ,  H01S3/06729 ,  H01S3/1608 ,  H01S3/1611

摘要： A rare-earth doped core multi-clad fiber includes a core that includes a rare-earth element and a plurality of cladding layers that surround the core. An outermost cladding of the plurality of cladding layers is made of a polymer cladding, the plurality of cladding layers have a polygonal inner cladding, and a shape of a boundary between a second cladding from the outside and the outermost cladding does not have two-fold rotational symmetry. As a result, it is possible to provide a rare-earth doped core multi-clad fiber for an optical amplifier and a fiber laser that has low skew and is inexpensive.

摘要翻译： 稀土掺杂的芯多包层光纤包括包含稀土元素的芯和围绕芯的多个包覆层。 多个包覆层中的最外层包层由聚合物包层制成，多个包覆层具有多边形内包层，并且来自外部的第二包层与最外包层之间的边界的形状不具有双折叠 旋转对称。 结果，可以提供一种用于光放大器的稀土掺杂核多包层光纤和具有低偏斜度并且便宜的光纤激光器。

公开(公告)号：US07647792B2

公开(公告)日：2010-01-19

申请号：US10983599

申请日：2004-11-09

申请人： Kentaro Ichii ,  Takakazu Gotoh ,  Naritoshi Yamada ,  Koichi Harada

发明人： Kentaro Ichii ,  Takakazu Gotoh ,  Naritoshi Yamada ,  Koichi Harada

IPC分类号： C03B37/018

CPC分类号： C03B37/0142 ,  C03B37/01413 ,  C03B2201/12 ,  C03B2203/22 ,  C03B2207/22 ,  C03B2207/36 ,  C03B2207/50 ,  Y02P40/57

摘要： A method for fabricating a porous silica preform includes the steps of supplying fuel gas for generating an oxyhydrogen flame to a glass synthesizing burner; supplying Gas A containing silicon and Gas B containing fluorine to the burner; synthesizing glass particles; and depositing the glass particles around a starting rod, in which when glass particles are deposited directly on the starting rod, a supply of Gas A and a supply of Gas B supplied to the burner are adjusted so that a ratio of the number of fluorine atoms to the number of silicon atoms in the gas supplied to the burner satisfies the following Formula (1): {(number of F atoms)/(number of Si atoms)}≦0.1   (1).

摘要翻译： 制造多孔二氧化硅预制件的方法包括以下步骤：向玻璃合成燃烧器提供产生氢氧焰的燃料气体; 将含有硅的气体A和含氟的气体B供应到燃烧器; 合成玻璃颗粒; 并且将玻璃颗粒沉积在起始棒周围，其中当玻璃颗粒直接沉积在起始棒上时，调节供应气体A和供应到燃烧器的气体B的供应，使得氟原子数 与供给到燃烧器的气体中的硅原子数相符合下述式（1）：{（F原子数）/（Si原子数）}