公开(公告)号：US06360046B1

公开(公告)日：2002-03-19

申请号：US09560399

申请日：2000-04-28

Applicant: Eisuke Sasaoka ,  Takatoshi Kato ,  Akira Urano ,  Yoshio Yokoyama

Inventor： Eisuke Sasaoka ,  Takatoshi Kato ,  Akira Urano ,  Yoshio Yokoyama

IPC: G02B602

CPC classification number: G02B6/03661 ,  G02B6/02014 ,  G02B6/02238 ,  G02B6/0281 ,  G02B6/0286 ,  G02B6/03611 ,  G02B6/03627

Abstract: The present invention relates to a dispersion-shifted optical fiber which comprises a structure for effectively eliminating the causes of deterioration in characteristics at the making stage thereof and is suitable for wavelength division multiplexing transmission. In the dispersion-shifted optical fiber according to the present invention, impurities to be added and the contents thereof are adjusted so as to reduce viscosity difference at each interface between individual glass regions. As a consequence of this structure, occurrence of structural irregularity and glass defect are effectively restrained in the vicinity of the interfaces between the regions.

Abstract translation: 色散位移光纤技术领域本发明涉及一种色散位移光纤，其特征在于，具有有效地消除其制造阶段的特性恶化的结构，适用于波分复用传输。 在根据本发明的色散位移光纤中，调节添加的杂质和其含量，以便降低各个玻璃区域之间的每个界面处的粘度差异。 作为这种结构的结果，在区域之间的界面附近有效地抑制了结构不规则性和玻璃缺陷的发生。

公开(公告)号：US06335995B1

公开(公告)日：2002-01-01

申请号：US09488643

申请日：2000-01-21

Applicant: Takatoshi Kato ,  Eisuke Sasaoka ,  Shinji Ishikawa

Inventor： Takatoshi Kato ,  Eisuke Sasaoka ,  Shinji Ishikawa

IPC: G02B602

CPC classification number: G02B6/02014 ,  C03B37/01446 ,  C03B37/01466 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/22 ,  C03B2203/36 ,  G02B6/02238 ,  G02B6/02271 ,  G02B6/0228 ,  G02B6/0365 ,  G02B6/03666

Abstract: The present invention aims to provide a dispersion-shifted fiber which can effectively restrain nonlinear optical effects from occurring and has a configuration suitable for long-haul light transmission. The dispersion-shifted fiber has, as various characteristics at a wavelength of 1,550 nm, a dispersion level of 1.0 to 4.5 ps/nm/km in terms of absolute value, a dispersion slope not greater than 0.13 ps/nm2/km in terms of absolute value, an effective core cross-sectional area not less than 70 &mgr;m2, and a transmission loss not greater than 0.25 dB/km with respect to light in a 1.55-&mgr;m wavelength band.

Abstract translation: 本发明的目的在于提供一种可以有效地抑制非线性光学效应发生并具有适于长距离透光的结构的色散位移光纤。 色散位移光纤作为波长为1,550nm的各种特性具有以绝对值表示的1.0至4.5ps / nm / km的色散水平，不大于0.13ps / nm 2 / km的色散斜率 绝对值，有效芯截面积不小于70mum2，相对于1.55μm波长带中的光的传输损耗不大于0.25dB / km。

公开(公告)号：US06333807B1

公开(公告)日：2001-12-25

申请号：US09626450

申请日：2000-07-26

Applicant: Hitoshi Hatayama ,  Eisuke Sasaoka

Inventor： Hitoshi Hatayama ,  Eisuke Sasaoka

IPC: G02F133

CPC classification number: H04B10/2941 ,  G02F1/0147 ,  G02F1/225 ,  G02F1/3136 ,  G02F2001/212 ,  G02F2001/311 ,  H01S3/06754 ,  H01S3/1301 ,  H01S2301/04 ,  H04B10/25073 ,  H04B10/296 ,  H04B2210/003 ,  H04J14/0221

Abstract: The present invention relates to an optical filter comprising a simple structure which easily realizes slope control of loss spectrum in a signal wavelength band as a gain equalizer. The optical filter comprises a first Mach-Zehnder interferometer constituted by a first part of a main optical line, a first auxiliary optical line, and first and second optical couplers which optically couple the main optical line and first auxiliary optical line to each other. The optical filter further comprises a second Mach-Zehnder interferometer constituted by a second part of the main optical line, a second auxiliary optical line, and third and fourth optical couplers which optically couple the main optical line and second auxiliary optical line to each other. In particular, in order for the slope of loss spectrum in a signal wavelength band to be adjustable while being centered about the amount of loss of light at a reference wavelength propagating through the main optical line from its entrance end to exit end, at least one of the first part of main optical line and the first auxiliary optical line is provided with a first temperature regulating device, at least one of the second part of main optical line and the second auxiliary optical line is provided with a second temperature regulating device, and the first and second temperature regulating devices are controlled by a control system.

Abstract translation: 本发明涉及一种滤光器，其包括简单的结构，其容易地实现信号波长带中的损耗谱的斜率控制作为增益均衡器。 光学滤波器包括由主光线的第一部分，第一辅助光线以及将主光线和第一辅助光线相互光耦合的第一和第二光耦合器构成的第一马赫 - 曾德干涉仪。 滤光器还包括由主光线的第二部分，第二辅助光线构成的第二马赫 - 曾德干涉仪，以及将主光线和第二辅助光线相互光耦合的第三和第四光耦合器。 特别地，为了将信号波长带中的损耗谱的斜率调整为以从入射端到出射端传播通过主光线的参考波长的光损失量为中心，至少一个 主光路的第一部分和第一辅助光线设置有第一温度调节装置，主光线和第二辅助光线的第二部分中的至少一个设置有第二温度调节装置，并且 第一和第二温度调节装置由控制系统控制。

公开(公告)号：US06332055B1

公开(公告)日：2001-12-18

申请号：US09517521

申请日：2000-03-02

Applicant: Hitoshi Hatayama ,  Eisuke Sasaoka

Inventor： Hitoshi Hatayama ,  Eisuke Sasaoka

IPC: G02B626

CPC classification number: G02B6/12019 ,  G02B6/12004 ,  G02B6/12026 ,  G02B6/122 ,  G02B2006/12147 ,  G02F1/0121 ,  G02F1/0147 ,  G02F1/225 ,  G02F2201/58 ,  G02F2203/48

Abstract: The present invention relates to an optical attenuator or the like which is easy to manufacture and is able to be miniaturized. In an optical attenuator according to this invention, a plurality of Mach-Zehnder-type waveguide elements are arranged in parallel on the common substrate. Each Mach-Zehnder-type waveguide element is provided with an input optical waveguide, a first directional coupler, two optical waveguides, a second directional coupler, an output optical waveguide, a monitoring optical waveguide and a temperature regulator for regulating the temperature of one of the two optical waveguides. Particularly, between the Mach-Zehnder-type waveguide elements adjacent to each other, an monitoring optical waveguide of one thereof and an output optical waveguide of the other thereof are arranged to cross.

Abstract translation: 本发明涉及容易制造且能够小型化的光衰减器等。 在根据本发明的光衰减器中，多个马赫 - 曾德尔型波导元件平行布置在公共基板上。 每个马赫 - 策德尔型波导元件设置有输入光波导，第一定向耦合器，两个光波导，第二定向耦合器，输出光波导，监控光波导和用于调节温度的温度调节器 两个光波导。 特别地，在彼此相邻的马赫 - 策德尔型波导元件之间，其一个的监视光波导和另一个的监视光波导被布置成交叉。

公开(公告)号：US5627930A

公开(公告)日：1997-05-06

申请号：US360708

申请日：1995-05-02

Applicant: Yoichi Ishiguro ,  Shigeru Semura ,  Yuji Kobayashi ,  Toshiyuki Wakinosono ,  Tomoyuki Hattori ,  Hiroshi Suganuma ,  Eisuke Sasaoka ,  Hiroaki Takimoto

Inventor： Yoichi Ishiguro ,  Shigeru Semura ,  Yuji Kobayashi ,  Toshiyuki Wakinosono ,  Tomoyuki Hattori ,  Hiroshi Suganuma ,  Eisuke Sasaoka ,  Hiroaki Takimoto

IPC: G02B6/28 ,  G02B6/38

CPC classification number: G02B6/2821 ,  G02B6/2835

Abstract: In a case where an arrayed optical fiber coupler obtained from a tape ribbon 1 is fixed to an reinforcement case 3, a glass portions 2b as a non-elongated portion outside of the elongated portions 2c of the coupler and a protection coating layers 2a at the back thereof are fixed to the reinforcement case 3 with an adhesive layer 4. A collectively coating resin layer 1a of the tape ribbon 1 is not fixed to the reinforcement case 3. The resin layer 1a is fixed to the reinforcement case 3 with a soft adhesive layer 5 different from the above adhesive layer 4, if necessary. As the resin of the adhesive layer 4, there is preferable an adhesive having the viscosity of 50 to 200 P and thermosetting property in addition to ultraviolet cure property.

Abstract translation: PCT No.PCT / JP94 / 00638 Sec。 371日期：1995年5月2日 102（e）日期1995年5月2日PCT 1994年4月18日PCT PCT。 第WO94 / 24591号公报 日期：1994年10月27日在从带带1获得的排列的光纤耦合器固定到加强壳体3的情况下，作为耦合器的细长部分2c外部的非细长部分的玻璃部分2b和保护 其背面的涂层2a用粘合剂层4固定到加强壳体3上。带带1的共同涂覆的树脂层1a不固定到加强壳体3上。树脂层1a固定到加强壳体 3，如果需要，具有与上述粘合剂层4不同的软粘合剂层5。 作为粘合层4的树脂，除了紫外线固化性以外，优选粘度为50〜200P，热固性的粘合剂。

公开(公告)号：US5329600A

公开(公告)日：1994-07-12

申请号：US892208

申请日：1992-06-02

Applicant: Eisuke Sasaoka ,  Masumi Fukuma ,  Hiroaki Takimoto ,  Hiroshi Suganuma ,  Hiroshi Yokota ,  Junichi Yoshikawa ,  Kazuhiko Arimoto

Inventor： Eisuke Sasaoka ,  Masumi Fukuma ,  Hiroaki Takimoto ,  Hiroshi Suganuma ,  Hiroshi Yokota ,  Junichi Yoshikawa ,  Kazuhiko Arimoto

IPC: G02B6/28 ,  G02B6/26

CPC classification number: G02B6/2835

Abstract: In an optical fiber coupler fabricating process where couplers are successively formed by heating, elongating and cutting a plurality of long optical fibers, light is led into the first end of the fiber, reflected at the second end of the coupler, and the reflected light is monitored by photodetectors. In this manner, an exact splitting ratio can be obtained. Techniques for minimizing measuring errors caused by the inter-reflected-light interference, the inter-Rayleigh-scattering-light interference, and the interference between the reflected light and the Rayleigh scattering light, while exploiting the advantageous feature of the reflection monitor method that the fiber connection work for each fiber coupler fabrication is not required are disclosed.

Abstract translation: 在通过加热，拉长和切割多根长的光纤连续地形成耦合器的光纤耦合器制造过程中，光被引入光纤的第一端，在耦合器的第二端被反射，并且反射的光是 由光电检测器监测。 以这种方式，可以获得精确的分离比。 用于最小化由反射光干涉引起的测量误差，瑞利散射光干涉以及反射光和瑞利散射光之间的干扰的技术，同时利用反射监测方法的有利特征， 公开了不需要每个光纤耦合器制造的光纤连接工作。

公开(公告)号：US5325450A

公开(公告)日：1994-06-28

申请号：US25643

申请日：1993-03-03

Applicant: Hiroshi Suganuma ,  Eisuke Sasaoka ,  Tomoyuki Hattori ,  Hiroaki Takimoto ,  Hiroshi Yokota

Inventor： Hiroshi Suganuma ,  Eisuke Sasaoka ,  Tomoyuki Hattori ,  Hiroaki Takimoto ,  Hiroshi Yokota

IPC: G02B6/293 ,  G02B6/28 ,  G02B6/287 ,  G02B6/26 ,  C03B23/20 ,  H04J14/00

CPC classification number: G02B6/2856 ,  G02B6/2835

Abstract: An optical fiber coupler having a crosstalk characteristic of at least 18 dB. The optical fiber coupler includes a plurality of optical fibers. A length of glass in the optical fibers is exposed by removing the covering. The glass lengths are fused together and extended, during which time the fibers are twisted and subjected to a tension. The twisted fibers are then fixed to a protecting member while the tension is sustained.

Abstract translation: 具有至少18dB的串扰特性的光纤耦合器。 光纤耦合器包括多个光纤。 通过去除覆盖物来曝光光纤中的玻璃长度。 玻璃长度熔合在一起并延伸，在此期间纤维被扭曲并受到张力。 然后将扭曲的纤维固定在保护构件上，同时保持张力。

公开(公告)号：US20130074551A1

公开(公告)日：2013-03-28

申请号：US13627084

申请日：2012-09-26

Applicant: Eisuke SASAOKA

Inventor： Eisuke SASAOKA

IPC: G02B6/24 ,  C03B37/023

CPC classification number: C03B37/01222 ,  C03B37/01225 ,  C03B37/01234 ,  C03B37/0126 ,  C03B37/0128 ,  C03B37/027 ,  C03B37/02754 ,  C03B37/02781 ,  C03B2201/02 ,  C03B2201/12 ,  C03B2203/14 ,  C03B2203/34 ,  C03B2205/10 ,  G02B6/02042 ,  G02B6/3851 ,  G02B6/3885

Abstract: The present invention, even in the case where the size of a preform itself is increased, enables production of a multi-core optical fiber in which cores are arranged with high accuracy. A plurality of core members each being rod-like are fixed by an array fixing member while a relative positional relation of the plurality of core members is fixed, and the plurality of core members and a cladding member are integrated into one piece, and thus a preform is obtained. By drawing the obtained preform, a multi-core optical fiber in which core arrangement is controlled with high accuracy is obtained.

Abstract translation: 本发明即使在预成型体本身的尺寸增加的情况下，也能够制造高精度地配置有芯的多芯光纤。 通过阵列固定部件固定多个芯棒部件，并且多个芯部件的相对位置关系固定，多个芯体部件和包层部件一体成型， 得到预制件。 通过拉伸所获得的预成型体，可以获得高精度地控制芯布置的多芯光纤。

公开(公告)号：US08077299B2

公开(公告)日：2011-12-13

申请号：US12530088

申请日：2008-02-12

Applicant: Yoshinori Yamamoto ,  Eisuke Sasaoka

Inventor： Yoshinori Yamamoto ,  Eisuke Sasaoka

IPC: G01N21/00

CPC classification number: G01M11/336 ,  C03B37/02745 ,  G01M11/319 ,  G01M11/39

Abstract: The present invention relates to a measuring method, etc., comprising a structure for accurately measuring optical characteristics such as PMD of an optical fiber. The measuring method is a technique for measuring polarization characteristic distributions along the longitudinal direction of the optical fiber as a measuring object by using BOCDA, and by propagating probe light and pumping light opposite in the optical fiber, BGS is generated at a plurality of respective measurement positions. Then, based on Brillouin gain fluctuations at the respective measurement positions, polarization characteristic distributions are calculated.

Abstract translation: 本发明涉及一种测量方法等，其包括用于精确测量诸如光纤的PMD的光学特性的结构。 该测量方法是通过使用BOCDA来测量作为测量对象的光纤的纵向的偏振特性分布的技术，并且通过传播探针光并在光纤中相反的泵浦光，在多个相应的测量中产生BGS 职位 然后，基于各测量位置处的布里渊增益波动，计算偏振特性分布。

公开(公告)号：US20110262749A1

公开(公告)日：2011-10-27

申请号：US13094550

申请日：2011-04-26

Applicant: Eisuke Sasaoka

Inventor： Eisuke Sasaoka

IPC: D02G3/00 ,  B29C67/20 ,  B29C67/00

CPC classification number: C03B37/0256 ,  C03B37/01853 ,  Y10T428/298

Abstract: The present invention enables easy manufacturing of a thermal insulating fine fiber and the like, for example, having a high degree of freedom in size and shape and excellent thermal insulating properties. In a manufacturing method according to the present invention, a first end of a preform constituted by bundling a plurality of pipes 1 is sealed, and suction of inner gas of each of the pipes is carried out from a second end side of the preform. By heating the preform with the internal pressure of each of the pipes being thus reduced from the first end side and drawing the preform, a fine fiber is made from the preform. While drawing the preform, by intermittently providing the fine fiber with sealing portions for sealing holes in the fine fiber, a thermal insulating fine fiber is manufactured.

Abstract translation: 本发明能够容易地制造绝热细纤维等，例如具有高度自由度的尺寸和形状以及优异的绝热性能。 在根据本发明的制造方法中，将通过捆扎多个管1的预成型件的第一端密封，并且从预成型体的第二端侧进行每个管的内部气体的吸入。 通过将每个管的内部压力从第一端侧减小并拉伸预制件来加热预成型件，由预成型件制成细纤维。 在拉伸预成型体的同时，通过间歇地向细纤维提供密封部分用于密封细纤维中的孔，制造绝热细纤维。