公开(公告)号：US20130243380A1

公开(公告)日：2013-09-19

申请号：US13887860

申请日：2013-05-06

Applicant: FUJIKURA LTD. ,  OSAKA PREFECTURE UNIVERSITY PUBLIC CORPORATION

Inventor： Ryo MARUYAMA ,  Nobuo KUWAKI ,  Shoichiro MATSUO ,  Masaharu OHASHI

IPC: G02B6/02

CPC classification number: G02B6/02 ,  G02B6/02019 ,  G02B6/03627

Abstract: An optical fiber (1) includes (i) an inner core (111) whose refractive index distribution has an a profile, (ii) an outer core (112) which surrounds the inner core (111), and (iii) a clad (12) which surrounds the outer core (112). In the optical fiber (1), Rd is set to not less than 0.15, where Rd is a ratio of a refractive index difference between the outer core (112) and the clad (12) to a refractive index difference between a center part of the inner core (111) and the clad (12).

Abstract translation: 光纤（1）包括（i）其折射率分布具有轮廓的内芯（111），（ii）围绕内芯（111）的外芯（112），以及（iii）包层 12）围绕外芯（112）。 在光纤（1）中，Rd被设定为不小于0.15，其中Rd是外芯（112）和包层（12）之间的折射率差之比与中心部分之间的折射率差 内芯（111）和包层（12）。

公开(公告)号：US20160161673A1

公开(公告)日：2016-06-09

申请号：US15019416

申请日：2016-02-09

Applicant: FUJIKURA LTD.

Inventor： Hiroki HAMAGUCHI ,  Nobuo KUWAKI

IPC: G02B6/255 ,  G06T7/00 ,  G02B6/02

CPC classification number: G02B6/2555 ,  G02B6/02042 ,  G02B6/2553 ,  G02B6/4221 ,  G06T7/0004

Abstract: An optical fiber alignment device includes an image-capturing device capturing images of end surfaces of two optical fibers; an image-analyzing device obtaining position coordinates of two or more cores in the end surfaces from the image captured by the image-capturing device for each of the two optical fibers; a calculation device substituting the position coordinates of the cores obtained for each of the optical fibers in a theoretical equation that represents a total sum of axial deviation losses at the time of splicing the cores to each other, the calculation device obtaining a positional relationship between the end surfaces of the optical fibers from the theoretical equation such that the total sum of the axial deviation losses becomes a minimum; and a driving device arranging the optical fibers such that the end surfaces of the optical fibers satisfy the positional relationship obtained by the calculation device.

Abstract translation: 光纤对准装置包括拍摄两根光纤的端面的图像的图像拍摄装置; 图像分析装置，从所述图像拍摄装置针对所述两个光纤中的每一个所拍摄的图像获得所述端面中的两个以上的芯的位置坐标; 计算装置，在将芯体拼接时的轴偏差损失的总和的理论式代替在各光纤中获得的芯的位置坐标，计算装置获得 从理论方程的光纤的端面，使得轴向偏差损耗的总和变得最小; 以及布置光纤的驱动装置，使得光纤的端面满足由计算装置获得的位置关系。

公开(公告)号：US20170045681A1

公开(公告)日：2017-02-16

申请号：US15306632

申请日：2016-02-22

Applicant: Fujikura Ltd.

Inventor： Ryo MARUYAMA ,  Nobuo KUWAKI

IPC: G02B6/028 ,  G02B6/02 ,  C03B37/027

CPC classification number: G02B6/0288 ,  C03B37/027 ,  C03B37/02745 ,  C03B2205/07 ,  C03C25/47 ,  G02B6/02047 ,  G02B6/0239 ,  G02B6/02395 ,  G02B6/03611 ,  G02B6/4484

Abstract: An optical fiber which allows propagation of two or more modes, and in a case where a mode coupling coefficient between at least two modes among the two or more modes is h [1/km], the length of the optical fiber is z [km], and the amount XT of coupling between the two modes is represented by XT=10·log10(zh) [dB], the amount XT of coupling satisfies Expression (A) described below. XT≧+14 [dB]  (A)

Abstract translation: 根据本发明的光纤传输两种或更多种模式。 当两个或更多个模式中的至少两个模式之间的模式耦合系数被设置为h [1 / km]时，光纤的长度被设置为z [km]，并且两者之间的耦合水平XT 模式由XT = 10·log10（zh）[dB]表示，耦合电平XT满足公式（A）。 XT≥+ 14 [dB] ...（A）