公开(公告)号：US07463346B2

公开(公告)日：2008-12-09

申请号：US11870246

申请日：2007-10-10

申请人： Ryuichiro Goto ,  Shoichiro Matsuo ,  Kuniharu Himeno

发明人： Ryuichiro Goto ,  Shoichiro Matsuo ,  Kuniharu Himeno

IPC分类号： G01N21/00

CPC分类号： G01M11/3145 ,  G01M11/3181

摘要： In a method of measurement of the birefringence of an optical fiber, the round-trip Jones matrix R(z) for a first interval (0, z) from a measurement starting point 0 in the optical fiber for measurement to a prescribed position z, and the round-trip Jones matrix R(z+Δz) for a second interval (0, z+Δz) from the measurement starting point 0 to a position z+Δz differing from the position z, are acquired, the eigenvalues ρ1, ρ2 of the matrix R(z+Δz)R(z)−1 are determined, and by computing the following equations (1) and (2), ϕ = arg ⁡ ( ρ 1 ρ 2 ) 2 ( 1 ) Δ ⁢ ⁢ n = λϕ 2 ⁢ π · Δ ⁢ ⁢ z ( 2 ) (where φ represents the phase difference between linear polarization components due to birefringence, Δn represents birefringence, and λ represents wavelength), the birefringence in the infinitesimal interval Δz from the position z to the position z+Δz is obtained.

公开(公告)号：US07158706B2

公开(公告)日：2007-01-02

申请号：US10360119

申请日：2003-02-07

申请人： Shoichiro Matsuo ,  Kuniharu Himeno ,  Harada Koichi

发明人： Shoichiro Matsuo ,  Kuniharu Himeno ,  Harada Koichi

IPC分类号： G02B6/036

CPC分类号： G02B6/03644 ,  G02B6/02019 ,  G02B6/02238 ,  G02B6/02271 ,  G02B6/03611 ,  G02B6/03627

摘要： An optical fiber is produced so as to have ring-shape refractive index profile such that chromatic dispersion is between +6 ps/nm/km or larger and smaller than +15 ps/nm/km in 1550 nm wavelength, the transmission loss is smaller than 0.210 dB/km, effective cross sectional area Aeff is larger than 90 μm2, dispersion slope is in a range of 0.05 ps/nm2/km and 0.08 ps/nm2/km. By doing this, an optical fiber having ring-shaped refractive index profile, enlarged effective cross sectional area, restricted dispersion slope, and low loss characteristics can be provided.

摘要翻译： 制造光纤以使得在1550nm波长中，色散在+ 6ps / nm / km以上且小于+ 15ps / nm / km的环状折射率分布，传输损耗较小 超过0.210dB / km时，有效横截面积A eff大于90μm2，色散斜率在0.05ps / nm 2 / SUP> / km和0.08ps / nm 2 / km。 通过这样做，可以提供具有环形折射率分布，有效截面面积扩大，色散斜率偏离和低损耗特性的光纤。

公开(公告)号：US09562827B2

公开(公告)日：2017-02-07

申请号：US13213506

申请日：2011-08-19

申请人： Shoji Tanigawa ,  Itaru Ishida ,  Shoichiro Matsuo ,  Toshio Kurashima ,  Kazuhide Nakajima ,  Tomoya Shimizu ,  Takashi Matsui ,  Yukihiro Goto

发明人： Shoji Tanigawa ,  Itaru Ishida ,  Shoichiro Matsuo ,  Toshio Kurashima ,  Kazuhide Nakajima ,  Tomoya Shimizu ,  Takashi Matsui ,  Yukihiro Goto

IPC分类号： G01M11/00

CPC分类号： G01M11/39 ,  G01M11/3145

摘要： A measuring method of a longitudinal distribution of bending loss of an optical fiber includes calculating an arithmetical mean value I(x) from two backscattering light intensities of two backscattering light at a position x obtained by bidirectional OTDR measurement of the optical fiber; and obtaining a bending loss value at the position x from a mode field diameter 2W(x) and a relative refractive index difference Δ(x) at the position x calculated from the arithmetical mean value.

摘要翻译： 光纤的弯曲损耗的纵向分布的测量方法包括从通过光纤的双向OTDR测量获得的位置x处的两个后向散射光的两个后向散射光强度计算算术平均值I（x）; 并根据算术平均值计算的位置x处的模场直径2W（x）和相对折射率差Δ（x）在位置x处获得弯曲损耗值。

公开(公告)号：US06694079B1

公开(公告)日：2004-02-17

申请号：US09787780

申请日：2001-03-21

申请人： Shoichiro Matsuo ,  Hiroshi Kutami ,  Shoji Tanigawa

发明人： Shoichiro Matsuo ,  Hiroshi Kutami ,  Shoji Tanigawa

IPC分类号： G02B622

CPC分类号： G02B6/0365 ,  G02B6/02014 ,  G02B6/02242 ,  G02B6/02257 ,  G02B6/02271 ,  G02B6/03611 ,  G02B6/03633

摘要： A dispersion-shifted optical fiber is obtained that has a refractive index distribution shape comprising a center core portion of high refractive index, a step core portion of lower refractive index than the center core portion, provided about the outer circumference thereof, and clad of lower refractive index than the step core portion, provided about the outer circumference of the step core, in which, by suitably setting structural parameters, both Aeff expansion and dispersion slope reduction are satisfactorily effected, simultaneously, under conditions that the optical fiber is substantially single-mode, and bending loss is held down to 100 dB/m or lower.

摘要翻译： 得到具有折射率分布形状的色散位移光纤，其折射率分布形状包括高折射率的中心纤芯部分，具有比中心纤芯部分低的折射率的阶梯形芯部分，围绕其外周设置，下部包层 通过适当地设定结构参数，可以令人满意地实现Aeff膨胀和色散斜率的减小，同时，在光纤基本上是单相的条件下， 模式，弯曲损耗保持在100dB / m以下。

公开(公告)号：US09121995B2

公开(公告)日：2015-09-01

申请号：US13559207

申请日：2012-07-26

申请人： Shoji Tanigawa ,  Katsuhiro Takenaga ,  Shoichiro Matsuo ,  Takashi Matsui ,  Taiji Sakamoto ,  Kyouzou Tsujikawa ,  Shigeru Tomita

发明人： Shoji Tanigawa ,  Katsuhiro Takenaga ,  Shoichiro Matsuo ,  Takashi Matsui ,  Taiji Sakamoto ,  Kyouzou Tsujikawa ,  Shigeru Tomita

IPC分类号： G02B6/036 ,  G02B6/032 ,  G02B6/02

CPC分类号： G02B6/02347 ,  G02B6/02333 ,  G02B6/03627

摘要： Each of a first clad region (12) and a second clad region (13) has holes (12a, 13a) which have identical diameters and are periodically formed so that the first clad region (12) and the second clad region (13) each have an effective refractive index lower than a refractive index of a core region (11), the effective refractive index of the first clad region (12) being lower than that of the second clad region (13).

摘要翻译： 第一覆盖区域（12）和第二覆盖区域（13）中的每一个具有相同直径的孔（12a，13a），并且周期性地形成，使得第一覆盖区域（12）和第二覆盖区域（13）各自 具有低于芯区域（11）的折射率的有效折射率，所述第一包层区域（12）的有效折射率低于所述第二包层区域（13）的有效折射率。

公开(公告)号：US09175946B2

公开(公告)日：2015-11-03

申请号：US13213328

申请日：2011-08-19

申请人： Itaru Ishida ,  Shoji Tanigawa ,  Shoichiro Matsuo ,  Toshio Kurashima ,  Kazuhide Nakajima ,  Tomoya Shimizu ,  Takashi Matsui ,  Yukihiro Goto

发明人： Itaru Ishida ,  Shoji Tanigawa ,  Shoichiro Matsuo ,  Toshio Kurashima ,  Kazuhide Nakajima ,  Tomoya Shimizu ,  Takashi Matsui ,  Yukihiro Goto

IPC分类号： G01N21/00 ,  H04B17/00 ,  G01B11/08 ,  G01N21/958 ,  G01N21/954 ,  G01B11/24 ,  G01B11/30

CPC分类号： G01B11/08 ,  G01B11/24 ,  G01B11/30 ,  G01B11/303 ,  G01B11/306 ,  G01N21/954 ,  G01N21/958

摘要： A measuring method of a hole diameter of a holey optical fiber includes calculating an arithmetical mean value I(x) from two backscattering light intensities at a position x of two backscattering light waveforms of the holey optical fiber, in which the two backscattering light waveforms are obtained by OTDR measurement; and obtaining the hole diameter at the position x, based on a correlation between an arithmetical mean value I(x) and an hole diameter of the holey optical fiber that is obtained in advance.

摘要翻译： 多孔光纤的孔径的测量方法包括从多孔光纤的两个后向散射光波形的位置x处的两个后向散射光强度计算算术平均值I（x），其中两个后向散射光波形是 通过OTDR测量获得; 并且基于预先获得的有孔光纤的算术平均值I（x）和孔径之间的相关性来获得位置x处的孔直径。

公开(公告)号：US06546177B1

公开(公告)日：2003-04-08

申请号：US09830027

申请日：2001-04-20

申请人： Shoichiro Matsuo ,  Shoji Tanigawa ,  Tomio Abiru

发明人： Shoichiro Matsuo ,  Shoji Tanigawa ,  Tomio Abiru

IPC分类号： G02B602

CPC分类号： G02B6/03666 ,  C03B37/01413 ,  C03B37/01807 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/36 ,  G02B6/02019 ,  G02B6/02238 ,  G02B6/03611 ,  G02B6/03633

摘要： In the present invention, by forming a dispersion shifted optical fiber that has a refractive index profile comprising: a central core portion 1; a step core portion 2 provided at an outer periphery of the central core portion 1 and having a refractive index lower than that of the central core portion 1; and cladding 7 provided at an outer periphery of the step core portion 2 and having a refractive index lower than that of the step core portion 2, and which dispersion shifted optical fiber has, in a used wavelength band that is selected from between 1490 and 1625 nm, chromatic dispersion values of 7 to 15 ps/km/nm, an Aeff of 60 to 150 &mgr;m2, a dispersion slope of 0.09 ps/km/nm2 or less, a bending loss of 100 dB/m or less, and a cutoff wavelength that provides essentially single mode transmission, it is possible to reduce the cost of the system and to achieve n improvement in the transmission characteristics.

摘要翻译： 在本发明中，通过形成具有折射率分布的色散位移光纤，包括：中心芯部分1; 设置在中心芯部1的外周并具有比中央芯部1的折射率低的折射率的台阶芯部2; 以及设置在台阶芯部2的外周并且折射率低于台阶芯部2的折射率的包层7，并且该色散位移光纤具有在从1490到1625之间的使用波长带中 nm，色散值为7〜15ps / km / nm，Aeff为60〜150mum2，色散斜率为0.09ps / km / nm2以下，弯曲损耗为100dB / m以下，截止频率为 提供基本单模传输的波长，可以降低系统的成本并实现传输特性的提高。

公开(公告)号：US06785453B1

公开(公告)日：2004-08-31

申请号：US09786855

申请日：2001-03-09

申请人： Shoichiro Matsuo ,  Shoji Tanigawa

发明人： Shoichiro Matsuo ,  Shoji Tanigawa

IPC分类号： G02B626

CPC分类号： G02B6/03666 ,  G02B6/02019 ,  G02B6/02238 ,  G02B6/03611 ,  G02B6/03633 ,  G02B6/03644 ,  G02B6/0365

摘要： A dispersion shifted optical fiber comprising a core and cladding provided at an outer periphery of the core, and having a refractive index profile in which the core is provided with a central core portion and a peripheral core portion having a higher refractive index than the central core portion provided at an outer periphery of the central core portion, and the cladding has a lower refractive index than the peripheral core portion, wherein, by appropriately setting the structural parameters, it is possible to provide a dispersion shifted optical fiber that is essentially single mode and is capable of fulfilling the condition of a bending loss of 100 dB/m or less, and that also provides a sufficient increase in the effective core area and a reduction in the dispersion slope.

摘要翻译： 一种色散位移光纤，包括设置在芯的外周的芯和包层，并且具有折射率分布，其中芯具有中心芯部分和具有比中心芯部更高的折射率的外围芯部分 部分设置在中心芯部分的外周，并且包层具有比外围芯部更低的折射率，其中，通过适当地设定结构参数，可以提供基本上单模的色散位移光纤 并且能够实现100dB / m以下的弯曲损耗的条件，并且还提供有效芯面积的充分增加和色散斜率的减小。

公开(公告)号：US08896822B2

公开(公告)日：2014-11-25

申请号：US13440757

申请日：2012-04-05

申请人： Yasuko Sugimoto ,  Shoichiro Matsuo

发明人： Yasuko Sugimoto ,  Shoichiro Matsuo

IPC分类号： G01N21/00 ,  G01N21/84 ,  G02B6/02

CPC分类号： G01N21/84 ,  G01M11/33 ,  G02B6/02

摘要： A cut-off wavelength measuring method according to the present invention includes: preparing a single mode fiber as a reference fiber; preparing a measurement target fiber; adjusting the length of the single mode fiber such that the length of the single mode fiber is longer than the that of the measurement target fiber at the time of measuring power of transmission light and the reference fiber propagates only light of a base mode at a predicted cut-off wavelength of the measurement target fiber; measuring wavelength dependence of power of light transmitted through the reference fiber and wavelength dependence of power of light transmitted through the measurement target fiber; and calculating a cut-off wavelength of the measurement target fiber based on wavelength dependence represented as the ratio of the power of transmission light transmitted through the measurement target fiber to the power of light transmitted through the reference fiber.

摘要翻译： 根据本发明的截止波长测量方法包括：制备单模光纤作为参考光纤; 准备测量目标纤维; 调整单模光纤的长度，使得在测量透射光的功率时单模光纤的长度比测量目标光纤的长度长，并且参考光纤仅传播预测的基模的光 测量目标光纤的截止波长; 测量通过参考光纤传输的光的功率的波长依赖性和透射通过测量目标光纤的光的功率的波长依赖性; 并且基于表示为透射通过测量目标光纤的透射光的功率与通过参考光纤透射的光的功率的比率的波长依赖性来计算测量目标光纤的截止波长。

公开(公告)号：US08195019B2

公开(公告)日：2012-06-05

申请号：US12648021

申请日：2009-12-28

申请人： Kenji Okada ,  Naritoshi Yamada ,  Shoichiro Matsuo

发明人： Kenji Okada ,  Naritoshi Yamada ,  Shoichiro Matsuo

IPC分类号： G02B6/36

CPC分类号： G02B6/03622 ,  G02B6/02033

摘要： A plastic glass optical fiber includes a glass core (diameter a1, relative refractive index difference Δ1, and refractive index n1), a polymer core (diameter a2, relative refractive index difference Δ2, and refractive index n2), and a polymer cladding (refractive index n3), in which the diameter a1 of the glass core is within a range of 110 μm to 200 μm, a parameter X (X is a22/a12) is within a range of 1.15≦X≦2.9, a parameter Y (Y is Δ2/Δ1) is within a range of 0.25≦Y≦0.84X−0.68 (when 1.15≦X≦2) or 0.48X−0.71≦Y≦−(2/9)X+13/9 (when 2≦X≦2.9), a parameter ZR (ZR is Z2core/Z1core; Z2core=a22π/4×√(n12−n32) and Z1core=a12π/4×√(n12−n22)) is within a range of 1.25≦ZR≦4.

摘要翻译： 塑料玻璃光纤包括玻璃芯（直径a1，相对折射率差Dgr; 1和折射率n1），聚合物芯（直径a2，相对折射率差Dgr; 2和折射率n2）和 聚合物包层（折射率n3），其中玻璃纤芯的直径a1在110μm至200μm的范围内，参数X（X是a22 / a12）在1.15＆lt; 1EE的范围内; X＆ 参数Y（Y为＆Dgr; 2 /＆Dgr; 1）在0.25＆nlE; Y＆nlE; 0.84X-0.68（当1.15＆nlE; X＆lt; ll; 2）或0.48X-0.71＆NlE; Y＆ 9）X + 13/9（当2＆nlE; X＆nlE; 2.9），参数ZR（ZR是Z2core / Z1core; Z2core = a22＆pgr; / 4×√（n12-n32）和Z1core = a12＆pgr; / 4×√ -n22））在1.25≤n1E的范围内; ZR＆nlE; 4。