公开(公告)号：US07362939B2

公开(公告)日：2008-04-22

申请号：US11349871

申请日：2006-02-08

申请人： Toshiaki Tsuda ,  Yasuo Uemura ,  Keiichi Aiso ,  Takeshi Yagi ,  Yukio Niino ,  Kazuhiko Nishiyama ,  Hiroshi Kobayashi

发明人： Toshiaki Tsuda ,  Yasuo Uemura ,  Keiichi Aiso ,  Takeshi Yagi ,  Yukio Niino ,  Kazuhiko Nishiyama ,  Hiroshi Kobayashi

IPC分类号： G02B6/02 ,  G02B6/036 ,  G02B6/34

CPC分类号： G02B6/02095 ,  G02B6/02171 ,  G02B6/4492

摘要： This invention relates to an optical fiber for long period grating (LPG), LPG components, and manufacturing method of LPG used as a mode coupler, an optical filter, etc. The optical fiber for LPG comprises a core layer, a first cladding layer that surrounds said core layer and transmits the cladding modes, and a second cladding layer that surrounds said first cladding layer and confines the optical signal of the cladding mode within said first cladding layer. The LPG component comprises an optical fiber for LPG, a coating reinforcement to cover and reinforce said optical fiber for LPG. The manufacturing method of LPG comprises a step of preparation of an optical fiber, a step of constructing the LPG on a predetermined region in said core of said optical fiber by irradiating laser light on said region over a predetermined period corresponding to the LPG, on the predetermined part of said optical fiber, and a step which covers and reinforces said grating region.

摘要翻译： 本发明涉及一种用于长周期光栅（LPG）的光纤，LPG部件以及用作模式耦合器的LPG的制造方法，滤光器等。用于LPG的光纤包括芯层，第一包层 围绕所述芯层并透射包层模;以及第二覆层，其围绕所述第一包层，并将所述包层模式的光信号限制在所述第一包层内。 LPG组件包括用于LPG的光纤，用于覆盖和加强用于LPG的所述光纤的涂层加强件。 LPG的制造方法包括制造光纤的步骤，在所述光纤的所述芯部的规定区域上，在与所述LPG对应的规定时间内在所述区域上照射激光，在所述光纤的所述芯部的规定区域上， 所述光纤的预定部分，以及覆盖并加强所述光栅区域的步骤。

公开(公告)号：US20060140559A1

公开(公告)日：2006-06-29

申请号：US11349871

申请日：2006-02-08

申请人： Toshiaki Tsuda ,  Yasuo Uemura ,  Keiichi Aiso ,  Takeshi Yagi ,  Yukio Niino ,  Kazuhiko Nishiyama ,  Hiroshi Kobayashi

发明人： Toshiaki Tsuda ,  Yasuo Uemura ,  Keiichi Aiso ,  Takeshi Yagi ,  Yukio Niino ,  Kazuhiko Nishiyama ,  Hiroshi Kobayashi

IPC分类号： G02B6/02 ,  G02B6/44 ,  G02B6/036 ,  G02B6/34

CPC分类号： G02B6/02095 ,  G02B6/02171 ,  G02B6/4492

摘要： This invention relates to an optical fiber for long period grating (LPG), LPG components, and manufacturing method of LPG used as a mode coupler, an optical filter, etc. The optical fiber for LPG comprises a core layer, a first cladding layer that surrounds said core layer and transmits the cladding modes, and a second cladding layer that surrounds said first cladding layer and confines the optical signal of the cladding mode within said first cladding layer. The LPG component comprises an optical fiber for LPG, a coating reinforcement to cover and reinforce said optical fiber for LPG. The manufacturing method of LPG comprises a step of preparation of an optical fiber, a step of constructing the LPG on a predetermined region in said core of said optical fiber by irradiating laser light on said region over a predetermined period corresponding to the LPG, on the predetermined part of said optical fiber, and a step which covers and reinforces said grating region.

摘要翻译： 本发明涉及一种用于长周期光栅（LPG）的光纤，LPG部件以及用作模式耦合器的LPG的制造方法，滤光器等。用于LPG的光纤包括芯层，第一包层 围绕所述芯层并透射包层模;以及第二覆层，其围绕所述第一包层，并将所述包层模式的光信号限制在所述第一包层内。 LPG组件包括用于LPG的光纤，用于覆盖和加强用于LPG的所述光纤的涂层加强件。 LPG的制造方法包括制造光纤的步骤，在所述光纤的所述芯部的规定区域上，在与所述LPG对应的规定时间内在所述区域上照射激光，在所述光纤的所述芯部的规定区域上， 所述光纤的预定部分，以及覆盖并加强所述光栅区域的步骤。

公开(公告)号：US20120301610A1

公开(公告)日：2012-11-29

申请号：US13525572

申请日：2012-06-18

申请人： Keiichi Aiso ,  Tetsuro Wada ,  Shinji Asao ,  Nobuaki Orita ,  Takeshi Yagi

发明人： Keiichi Aiso ,  Tetsuro Wada ,  Shinji Asao ,  Nobuaki Orita ,  Takeshi Yagi

IPC分类号： B05D1/12 ,  B05C19/04

CPC分类号： C03B37/01294

摘要： A method of producing a glass preform by depositing silica powder that contains silica particles on a starting material includes a transferring step, a disaggregating step, and a depositing step. The transferring step includes transferring the silica powder. The disaggregating step includes disaggregating and dispersing agglomerates of the silica particles contained in the silica powder while being transferred in the transferring step. The depositing step includes depositing the silica powder, which is transferred and is obtained by disaggregating and dispersing the agglomerates of the silica particles, on the starting material.

摘要翻译： 通过在原料上沉积含有二氧化硅颗粒的二氧化硅粉末制造玻璃预制体的方法包括转印步骤，分解步骤和沉积步骤。 转移步骤包括转移二氧化硅粉末。 解聚步骤包括在转移步骤中转移二氧化硅粉末中包含的二氧化硅颗粒的附聚物的分散和分散。 沉积步骤包括沉积二氧化硅粉末，其通过将二氧化硅颗粒的附聚物分解和分散而转移并获得在原料上。

公开(公告)号：US07079738B2

公开(公告)日：2006-07-18

申请号：US10824429

申请日：2004-04-15

申请人： Toshihiro Nakamura ,  Keiichi Aiso ,  Takeshi Yagi ,  Hisashi Koaizawa ,  Yoko Moriai

发明人： Toshihiro Nakamura ,  Keiichi Aiso ,  Takeshi Yagi ,  Hisashi Koaizawa ,  Yoko Moriai

IPC分类号： G02B6/02 ,  C03B37/023

CPC分类号： H01S3/06716 ,  C03B37/01433 ,  C03B37/0148 ,  C03B37/01493 ,  C03B2201/10 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/36 ,  C03C13/045 ,  Y02P40/57

摘要： An optical fiber for optical amplification, characterized in that a full width at half maximum of gain spectrum is 45 nm or more; and a maximum value of power conversion efficiency is 80% or more. A method for producing a rare earth element-doped glass for use in manufacturing the optical fiber, which comprises a deposition step of depositing fine silica glass particles and a co-dopant (a) to prepare an aggregate of fine silica glass particles doped with the co-dopant (a); and a immersion step of immersing the aggregate of fine silica glass particles prepared in the deposition step in a solution containing the rare earth element and the co-dopant (b) to thereby dope the aggregate of fine silica glass particles with the rare earth element component and the co-dopant (b).

摘要翻译： 一种用于光放大的光纤，其特征在于，增益谱的半值全宽为45nm以上; 功率转换效率的最大值为80％以上。 一种制造用于制造光纤的稀土元素掺杂玻璃的方法，包括沉积步骤，沉积细二氧化硅玻璃颗粒和共掺杂剂（a），以制备掺杂有 共掺杂剂（a）; 以及浸渍步骤，将沉积步骤中制备的细二氧化硅玻璃颗粒的聚集体浸入含有稀土元素和共掺杂物（b）的溶液中，从而将稀土元素组分 和共掺杂剂（b）。

公开(公告)号：US06463201B2

公开(公告)日：2002-10-08

申请号：US09985477

申请日：2001-11-05

申请人： Keiichi Aiso ,  Yoshio Tashiro ,  Takeshi Yagi

发明人： Keiichi Aiso ,  Yoshio Tashiro ,  Takeshi Yagi

IPC分类号： G02B602

CPC分类号： G02B6/03644 ,  C03C3/06 ,  C03C13/046 ,  C03C2201/12 ,  C03C2201/28 ,  C03C2201/31 ,  C03C2201/34 ,  C03C2201/3476 ,  C03C2201/3488 ,  C03C2201/36 ,  G02B6/03627 ,  G02B6/03633 ,  H01S3/0672 ,  H01S3/06729

摘要： A light amplification optical fiber capable of suppressing a decrease in an amplification efficiency thereof ascribed to the concentration quenching of erbium ions, and the nonlinearity thereof is provided. At least one rare earth element, for example, Yb, which is other than the erbium ions, and which has an ion radius not smaller than 70% and not larger than 130% of that of erbium ions is doped to a core portion of an erbium ion-doped light amplification optical fiber.

公开(公告)号：US07466479B2

公开(公告)日：2008-12-16

申请号：US11030147

申请日：2005-01-07

申请人： Keiichi Aiso

发明人： Keiichi Aiso

IPC分类号： H01S3/00

CPC分类号： C03C13/04 ,  H01S3/06708 ,  H01S3/094003

摘要： By optimizing the refractive index profile, the absorption coefficient of a rare earth element doped optical fiber can be enlarged and nonlinear effect can be suppressed. Thus, according to the present invention, the optical fiber, which is suitable for 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 a refractive index smaller than that of said core surrounding said core, and the second cladding having a refractive index smaller than that of said core and larger than that of said first cladding surrounding said first cladding is prepared and are suitable for the wide band optical amplification. That is, since in the rare earth element optical fiber of this W-shape profile, both the absorption coefficient of a rare earth element, and the absolute value of chromatic dispersion can be increased greatly as compared to the optical fiber of the conventional step index profile and nonlinear effect can be suppressed more efficiently, an optical fiber which is suitable for further wide band optical amplification, is realizable.

摘要翻译： 通过优化折射率分布，可以扩大稀土元素掺杂光纤的吸收系数，并且可以抑制非线性效应。 因此，根据本发明，可以实现适用于宽带光放大的光纤。 此外，在本发明中，包括芯的W型轮廓的光纤，所述第一包层的折射率小于围绕所述纤芯的所述纤芯的折射率，所述第二包层的折射率小于所述芯的折射率 并且比围绕所述第一包层的所述第一包层的尺寸大，并且适合于宽带光学放大。 也就是说，由于在这种W形轮廓的稀土元素光纤中，稀土元素的吸收系数和色散的绝对值都可以与传统步长的光纤相比大大增加 可以更有效地抑制轮廓和非线性效应，适用于进一步的宽带光放大的光纤是可实现的。

公开(公告)号：US6055353A

公开(公告)日：2000-04-25

申请号：US086465

申请日：1998-05-29

申请人： Keiichi Aiso

发明人： Keiichi Aiso

IPC分类号： G02B6/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/10 ,  G02B6/02

CPC分类号： H01S3/06708

摘要： The present invention provides an optical fiber for optical amplification used for an optical transmission system, for which the chromatic dispersion is controlled, and an optical amplifier in which the optical fiber for optical amplification is employed. The optical fiber according to the invention is such that the cladding has a lower refractive index than the core and is disposed so as to surround the core having a higher refractive index than that of the cladding, wherein the refractive index difference .DELTA. of the core with respect to the abovementioned cladding is from 0.4% to 1.9% and the diameter of the abovementioned core is from 4.2 to 5.0 .mu.m.

摘要翻译： 本发明提供一种光放大用光纤，其用于光传输系统，其色散被控制，以及光放大器，其中采用光放大光纤。 根据本发明的光纤使得包层的折射率低于芯部，并且被设置为围绕具有比包层的折射率更高的折射率的芯，其中芯的折射率差ΔTATA与 相对于上述包层为0.4〜1.9％，上述芯的直径为4.2〜5.0μm。

公开(公告)号：US06766089B2

公开(公告)日：2004-07-20

申请号：US10662341

申请日：2003-09-16

申请人： Shinichi Arai ,  Ryuichi Sugizaki ,  Keiichi Aiso ,  Naoto Oyama ,  Jun Terada ,  Hisashi Koaizawa ,  Katsunori Inoue

发明人： Shinichi Arai ,  Ryuichi Sugizaki ,  Keiichi Aiso ,  Naoto Oyama ,  Jun Terada ,  Hisashi Koaizawa ,  Katsunori Inoue

IPC分类号： G02B602

CPC分类号： G02B6/02009 ,  G02B6/02014 ,  G02B6/02242 ,  G02B6/02257 ,  G02B6/02261 ,  G02B6/02271 ,  G02B6/0228 ,  G02B6/0286 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/03666

摘要： A low-dispersion optical fiber provides both reduced chromatic dispersion in a used wavelength band and increased effective core area. The low-dispersion optical fiber is made by covering a center core (1) with a first side core (2), covering the first side core (2) with a second side core (3), and covering the second side core (3) with a cladding (5). When the maximum refractive index of the center core (1) is written n1, the minimum refractive index of the first side core (2) is written n2, the maximum refractive index of the second side core (3) is written n3 and the refractive index of the cladding (5) is written nc, then n1>n3>nc>n2 is satisfied. Relative refractive index differences &Dgr;1, &Dgr;2 and &Dgr;3 with respect to the cladding (5) of the maximum refractive index of the center core (1), the minimum refractive index of the first side core (2) and the maximum refractive index of the second side core (3) respectively are made 0.4%≦&Dgr;1≦0.7%, −0.30%≦&Dgr;2≦−0.05% and 0.2%≦&Dgr;3.

摘要翻译： 低色散光纤在使用的波长带中提供减少的色散并增加有效核心区域。 低分散光纤通过用第一侧芯（2）覆盖中心芯（1），用第二侧芯（3）覆盖第一侧芯（2）并覆盖第二侧芯（3） ）与包层（5）。 当中心芯（1）的最大折射率被写入n1时，第一侧芯（2）的最小折射率被写为n2，第二侧芯（3）的最大折射率被写为n3，折射率 将包层（5）的折射率写入nc，则满足n1> n3> nc> n2。 相对于中心纤芯（1）的最大折射率的包层（5），第一侧芯（2）的最小折射率和第二侧芯的最大折射率的相对折射率差Δ1，Delta2和Delta3 侧芯（3）分别为0.4％<=Δ1<= 0.7％，-0.30％<=Δ2≤0.05％和0.2％<= DELTA3。

公开(公告)号：US06684018B2

公开(公告)日：2004-01-27

申请号：US09983616

申请日：2001-10-25

申请人： Shinichi Arai ,  Ryuichi Sugizaki ,  Keiichi Aiso ,  Naoto Oyama ,  Jun Terada ,  Hisashi Koaizawa ,  Katsunori Inoue

发明人： Shinichi Arai ,  Ryuichi Sugizaki ,  Keiichi Aiso ,  Naoto Oyama ,  Jun Terada ,  Hisashi Koaizawa ,  Katsunori Inoue

IPC分类号： G02B602

CPC分类号： G02B6/02009 ,  G02B6/02014 ,  G02B6/02242 ,  G02B6/02257 ,  G02B6/02261 ,  G02B6/02271 ,  G02B6/0228 ,  G02B6/0286 ,  G02B6/03627 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/03666

摘要： A low-dispersion optical fiber provides both reduced chromatic dispersion in a used wavelength band and increased effective core area. The low-dispersion optical fiber is made by covering a center core (1) with a first side core (2), covering the first side core (2) with a second side core (3), and covering the second side core (3) with a cladding (5). When the maximum refractive index of the center core (1) is written n1, the minimum refractive index of the first side core (2) is written n2, the maximum refractive index of the second side core (3) is written n3 and the refractive index of the cladding (5) is written nc, then n1>n3>nc>n2 is satisfied. Relative refractive index differences &Dgr;1, &Dgr;2 and &Dgr;3 with respect to the cladding (5) of the maximum refractive index of the center core (1), the minimum refractive index of the first side core (2) and the maximum refractive index of the second side core (3) respectively are made 0.4%≦&Dgr;1≧0.7%, −0.30%≦&Dgr;2≦−0.05% and 0.2%≦&Dgr;3.

摘要翻译： 低色散光纤在使用的波长带中提供减少的色散并增加有效核心区域。 低分散光纤通过用第一侧芯（2）覆盖中心芯（1），用第二侧芯（3）覆盖第一侧芯（2）并覆盖第二侧芯（3） ）与包层（5）。 当中心芯（1）的最大折射率被写入n1时，第一侧芯（2）的最小折射率被写为n2，第二侧芯（3）的最大折射率被写为n3，折射率 将包层（5）的折射率写入nc，则满足n1> n3> nc> n2。 相对于中心纤芯（1）的最大折射率的包层（5），第一侧芯（2）的最小折射率和第二侧芯的最大折射率的相对折射率差Δ1，Delta2和Delta3 侧芯（3）分别为0.4％<=Δ1> = 0.7％，-0.30％<=Δ2≤0.05％和0.2％<= DELTA3。

公开(公告)号：US08233761B2

公开(公告)日：2012-07-31

申请号：US12793384

申请日：2010-06-03

申请人： Ryo Miyabe ,  Keiichi Aiso

发明人： Ryo Miyabe ,  Keiichi Aiso

IPC分类号： G02B6/032 ,  G02B6/02

CPC分类号： G02B6/02214 ,  G02B6/02366 ,  G02B6/02376 ,  G02B6/2551

摘要： An optical fiber includes a core region having a first refractive index and a cladding region having a second refractive index lower than the first refractive index on an outer circumference of the core region. The cladding region includes four holes formed to have a four-fold rotational symmetry with respect to a center axis around the core region in a longitudinal direction, such that a zero-dispersion wavelength is 900 nm to 1150 nm and a cutoff wavelength is equal to or shorter than 950 nm.

摘要翻译： 光纤包括具有第一折射率的芯区域和在芯区域的外周上具有低于第一折射率的第二折射率的包层区域。 包层区域包括四个孔，其形成为在纵向方向上相对于芯区域周围的中心轴线具有四重旋转对称，使得零色散波长为900nm至1150nm，截止波长等于 或短于950nm。