公开(公告)号：US06269211B1

公开(公告)日：2001-07-31

申请号：US09518132

申请日：2000-03-03

Applicant: Hitoshi Hatayama ,  Eisuke Sasaoka

Inventor： Hitoshi Hatayama ,  Eisuke Sasaoka

IPC: G02B610

CPC classification number: G02B6/1228 ,  G02B6/305

Abstract: The present invention relates to an optical plane waveguide capable of reducing the coupling loss with respect to an optical fiber and achieving downsizing and higher integration. The optical plane waveguide according to the present invention comprises a core region provided in a substrate, and one or more side core regions provided along the tip portion of the core region. The core region and the side core regions have a higher refractive index than the substrate. Moreover, end faces of the core region and the side core regions coincide with the end face of the substrate and function as a light input/output port for signal light. In particular, since the side core regions are provided along the core region and positioned at a peripheral portion of the substrate where the end face of the substrate is included. According to the configuration, the mode field diameter of signal light can be enlarged at least in a direction parallel to a surface of the substrate with a single mode condition satisfied, whereby the coupling loss with respect to the optical fiber can be reduced.

Abstract translation: 本发明涉及能够减少相对于光纤的耦合损耗并实现小型化和更高集成度的光学平面波导。 根据本发明的光学平面波导包括设置在基板中的芯区域和沿芯区域的尖端部分设置的一个或多个侧芯区域。 芯区域和侧芯区域具有比衬底更高的折射率。 此外，芯区域和侧芯区域的端面与衬底的端面重合，并且用作用于信号光的光输入/输出端口。 特别地，由于侧芯区域沿着核心区域设置并且位于包括衬底的端面的衬底的周边部分。 根据该结构，在满足单模状态的情况下，信号光的模场直径可以至少在平行于基板的表面的方向上扩大，从而能够降低相对于光纤的耦合损耗。

公开(公告)号：US6157754A

公开(公告)日：2000-12-05

申请号：US75324

申请日：1998-05-11

Applicant: Eisuke Sasaoka ,  Takatoshi Kato

Inventor： Eisuke Sasaoka ,  Takatoshi Kato

IPC: G02B6/00 ,  G02B6/02 ,  H04B10/25 ,  H04B10/2525 ,  G02B6/28

CPC classification number: H04B10/25253

Abstract: The present invention relates to an optical transmission line, applicable to Wave Division Multiplexing (WDM) transmission, having a structure for restraining optical transmission characteristics from deteriorating due to each of the occurrence of nonlinear optical phenomena and the wavelength dispersion. This optical transmission line comprises, at least, a first optical fiber having, as characteristics at the predetermined operating wavelength, a first effective area and a first dispersion slope; and a second optical fiber having, as characteristics at the predetermined operating wavelength, a second effective area smaller than the first effective area and a second dispersion slope smaller than the first dispersion slope. In particular, the second optical fiber contributes to suppressing the deterioration in its optical transmission characteristics in the whole optical transmission line.

Abstract translation: 本发明涉及一种适用于波分多路复用（WDM）传输的光传输线路，具有抑制由于非线性光学现象和波长色散引起的光传输特性劣化的结构。 该光传输线至少包括作为在预定工作波长处的特性的第一有效区域和第一色散斜率的第一光纤; 以及第二光纤，其具有作为所述预定工作波长的特性的小于所述第一有效面积的第二有效面积和小于所述第一色散斜率的第二色散斜率。 特别地，第二光纤有助于抑制整个光传输线路中的光传输特性的劣化。

公开(公告)号：US08346041B2

公开(公告)日：2013-01-01

申请号：US13371835

申请日：2012-02-13

Applicant: Eisuke Sasaoka ,  Kazuya Kuwahara

Inventor： Eisuke Sasaoka ,  Kazuya Kuwahara

IPC: G02B6/00 ,  H04B10/12

CPC classification number: G02B6/02019 ,  G02B6/0365 ,  H04B10/2916

Abstract: The present invention relates to an optical communications system that allows improving OSNR while suppressing the power increase of pumping light for distributed Raman amplification. In the optical communications system, an optical fiber is laid in a transmission section between a transmitter station (or repeater station) and a receiver station (or repeater station), and optical signals are transmitted from the transmitter station to the receiver station via the optical fiber. In the optical communications system, pumping light for Raman amplification, outputted by a pumping light source provided in the receiver station, is fed into the optical fiber via an optical coupler, and the optical signals are distributed-Raman-amplified in the optical fiber. The transmission loss and the effective area of the optical fiber satisfy, at the wavelength of 1550 nm, a predetermined relationship.

Abstract translation: 本发明涉及一种允许改善OSNR同时抑制用于分布式拉曼放大的泵浦光功率增加的光通信系统。 在光通信系统中，光纤被放置在发射台（或中继站）和接收站（或中继站）之间的传输部分中，并且光信号经由光信号从发射台发射到接收站 纤维。 在光通信系统中，由接收站中提供的泵浦光源输出的用于拉曼放大的泵浦光通过光耦合器馈送到光纤中，并且光信号在光纤中被分布拉曼放大。 光纤的传输损耗和有效面积在1550nm的波长下满足预定的关系。

公开(公告)号：US08337080B2

公开(公告)日：2012-12-25

申请号：US12522420

申请日：2007-12-19

Applicant: Eisuke Sasaoka ,  Osamu Ichikawa

Inventor： Eisuke Sasaoka ,  Osamu Ichikawa

IPC: G01K1/16

CPC classification number: G01K11/32 ,  G01D5/35303

Abstract: The present invention relates to a measuring method and a sensor unit of measuring temperature distribution of an object by using an optical fiber sensing technology of BOCDA system. In the measuring method, an optical fiber that functions as a BOCDA-type optical fiber sensor is disposed two-dimensionally or three-dimensionally with respect to a predetermined measurement region of the object, and thereby the temperature distribution of the object can be measured at a high speed and a high accuracy, in the predetermined measurement region configuring a surface or space where the optical fiber is disposed.

Abstract translation: 本发明涉及通过使用BOCDA系统的光纤传感技术来测量物体的温度分布的测量方法和传感器单元。 在测量方法中，用作BOCDA型光纤传感器的光纤相对于物体的预定测量区域二维或三维地设置，从而可以在物体的温度分布 在构成配置光纤的表面或空间的预定测量区域中，高速度和高精度。

公开(公告)号：US08320724B2

公开(公告)日：2012-11-27

申请号：US12690496

申请日：2010-01-20

Applicant: Eisuke Sasaoka

Inventor： Eisuke Sasaoka

IPC: G02B6/04 ,  G02B6/02

CPC classification number: G02B6/02042 ,  G02B6/264 ,  G02B6/3879 ,  G02B6/4249 ,  G02B6/4472

Abstract: The present invention relates to an optical communication system or the like, which comprises a multicore fiber with a plurality of cores that are two-dimensionally arrayed in a cross-section thereof. In the optical communication system, an arrangement converter, provided between a multicore fiber and an Optical Line Terminal (OLT) having light emitting areas arrayed one-dimensionally, comprises first and second end faces, and a plurality of optical waveguides. The optical waveguides are disposed such that one of the end faces coincides with the first end face and the other end face coincides with the second end face. In particular, the optical waveguide end face array on the first end face and the optical waveguide end face array on the second face are different, contributing to an optical link between network resources of different types.

Abstract translation: 光通信系统等技术领域本发明涉及光通信系统等，该光通信系统等包括具有多个核心的多芯光纤，其二维排列在其横截面上。 在光通信系统中，设置在多芯光纤与具有一维排列的发光区域的光线路终端（OLT）之间的布置转换器包括第一和第二端面以及多个光波导。 光波导被设置为使得一个端面与第一端面重合，另一端面与第二端面重合。 特别地，第一端面上的光波导端面阵列和第二面上的光波导端面阵列是不同的，有助于不同类型的网络资源之间的光链路。

公开(公告)号：US08184937B2

公开(公告)日：2012-05-22

申请号：US12526440

申请日：2008-01-29

Applicant: Itaru Sakabe ,  Eisuke Sasaoka ,  Tomoyuki Hattori

Inventor： Itaru Sakabe ,  Eisuke Sasaoka ,  Tomoyuki Hattori

IPC: G02B6/036 ,  G02B6/02

CPC classification number: G02B6/4432 ,  C03C25/106 ,  G02B6/0288 ,  G02B6/4436 ,  G02B6/4482

Abstract: The present invention relates to an optical cable with a structure for improving a durability performance. The optical cable comprises, as a basic structure: a coated optical fiber, and a cable jacket covering an outer periphery of the coated optical fiber. The coated optical fiber is constituted by a glass fiber and a coating layer of an ultraviolet curing resin. To realize excellent impact resistance as durability performance, the coating layer of the coated optical fiber includes a first coating with a Young's modulus of 200 MPa or more. Meanwhile, the cable jacket is comprised of a thermoplastic resin that does not contain any halogens. The cable jacket has a thickness of 0.7 mm or more, a flame retardancy of V2 or more according to UL Standards, and a Young's modulus equal to or greater than that of the first coating.

Abstract translation: 本发明涉及具有提高耐久性能的结构的光缆。 光缆包括作为基本结构的涂覆光纤，以及覆盖被覆光纤的外周的电缆护套。 被覆光纤由玻璃纤维和紫外线固化树脂的被覆层构成。 为了实现作为耐久性的优异的耐冲击性，涂布光纤的涂层包括杨氏模量为200MPa以上的第一涂层。 同时，电缆护套由不含任何卤素的热塑性树脂组成。 电缆护套的厚度为0.7mm以上，根据UL标准的阻燃性为V2以上，杨氏模量等于或大于第一涂层的杨氏模量。

公开(公告)号：US20110280532A1

公开(公告)日：2011-11-17

申请号：US13108251

申请日：2011-05-16

Applicant: Eisuke SASAOKA

Inventor： Eisuke SASAOKA

IPC: G02B6/02 ,  C03B37/027 ,  C03B37/025

CPC classification number: C03B37/01222 ,  C03B37/01211 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2203/34 ,  G02B6/0365 ,  Y02P40/57

Abstract: The present invention relates to, for example, a method of easily manufacturing an optical fiber having any refractive index profile with fewer kinds of rods, and an optical fiber is manufactured by preparing a plurality of rods including at least two kinds of rods having different refractive indexes from each other, bundling rods selected from the plurality of rods to construct two or more rod units, producing a preform including a region in which the two or more rod units are combined so as to have a cross-sectional shape having rotational symmetry of order 2 or more, and manufacturing an optical fiber by drawing the preform.

Abstract translation: 本发明涉及例如容易制造具有较少种类的棒的具有任何折射率分布的光纤的方法，并且通过制备多个棒来制造光纤，所述棒包括至少两种具有不同折射率的棒 相互指标，从多个杆中选择的捆扎杆构成两个或更多个杆单元，产生预型件，该预成型件包括两个或更多个杆单元组合在一起的区域，以具有旋转对称的横截面形状 2级以上，并且通过拉伸预成型件来制造光纤。

公开(公告)号：US20110249940A1

公开(公告)日：2011-10-13

申请号：US13083757

申请日：2011-04-11

Applicant: Eisuke SASAOKA ,  Osamu Shimakawa ,  Takuji Nagashima

Inventor： Eisuke SASAOKA ,  Osamu Shimakawa ,  Takuji Nagashima

IPC: G02B6/26

CPC classification number: G02B6/02042 ,  G02B6/264 ,  G02B6/2821

Abstract: The present invention provides an optical branching device and an optical communication system which are easy to connect with optical fibers. In the optical branching device, when light emitted from an optical fiber in a front stage is incident on an entrance port of a multicore optical fiber, the light propagates through a first core and then is distributed from the first core to four second cores by core-to-core crosstalk between the first and second cores. The light beams distributed to the four second cores propagate through the respective cores and are emitted to four optical waveguides optically coupled core-to-core thereto within a fan-out part at exit ports.

Abstract translation: 本发明提供一种易于与光纤连接的光分路装置和光通信系统。 在光分支装置中，当从前级的光纤发射的光入射到多芯光纤的入口时，光通过第一芯传播，然后通过芯从第一芯分配到四个第二芯 在第一和第二核之间的核心串扰。 分布到四个第二芯的光束通过相应的芯传播，并且在出口处的扇出部分内发射到与芯到芯光耦合的四个光波导。

公开(公告)号：US20110235983A1

公开(公告)日：2011-09-29

申请号：US13034347

申请日：2011-02-24

Applicant: Tetsuya Hayashi ,  Eisuke Sasaoka

Inventor： Tetsuya Hayashi ,  Eisuke Sasaoka

IPC: G02B6/44

CPC classification number: G02B6/02042 ,  G02B6/4434 ,  G02B6/4478 ,  G02B6/449

Abstract: The present invention relates to an optical fiber cable incorporating a multi-core fiber provided with a plurality of cores and a cladding region. The optical fiber cable has a jacket covering the multi-core fiber. The multi-core fiber is arranged so that a hold wrap holds the cores in a state in which they are provided with a bend of not more than a fixed radius of curvature, in order to reduce crosstalk between the cores.

Abstract translation: 本发明涉及一种结合有设置有多个芯的多芯光纤和包层区域的光纤电缆。 光纤电缆具有覆盖多芯光纤的护套。 多芯光纤被布置成使得保持包裹物将芯保持在其中设置有不大于固定曲率半径的弯曲的状态，以便减少芯之间的串扰。

公开(公告)号：US20110206330A1

公开(公告)日：2011-08-25

申请号：US13009874

申请日：2011-01-20

Applicant: Eisuke SASAOKA

Inventor： Eisuke SASAOKA

IPC: G02B6/036

CPC classification number: G02B6/02042 ,  G02B6/105

Abstract: The present invention relates to a multicore optical fiber having a structure for effectively inhibiting polarization mode dispersion from increasing, and the multicore optical fiber comprises a plurality of multicore units and a cladding region integrally covering the plurality of multicore units while separating the multicore units from each other. Each of the plurality of multicore units includes a plurality of core regions arranged such as to construct a predetermined core arrangement structure on a cross section orthogonal to an axis. The core arrangement structure of each multicore unit on the cross section has such a rotational symmetry as to coincide with the unrotated core arrangement structure at least three times while rotating by 360° about a center of the multicore unit, thereby reducing the structural asymmetry of each multicore unit. This lowers the structural birefringence in each multicore unit, thereby inhibiting the polarization mode dispersion from increasing in the multicore optical fiber.

Abstract translation: 本发明涉及一种具有有效抑制偏振模色散的结构的多芯光纤的增加，多芯光纤包括多个多芯单元和一个覆盖多个多核单元的包层区，同时将多核单元与每个多核单元分离 其他。 多个多芯单元中的每一个包括多个芯区域，其布置成在垂直于轴线的横截面上构造预定的芯布置结构。 横截面上的每个多芯单元的核心布置结构具有这样的旋转对称性，即与未旋转的芯排列结构一致，至少三次，同时围绕多芯单元的中心旋转360°，从而减少每个多轴单元的结构不对称性 多核单位 这降低了每个多芯单元中的结构双折射，从而抑制了多芯光纤中的偏振模色散增加。