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11. 发明授权

US06868213B2 Optical fiber and production method therefor 有权
标题翻译：光纤及其制作方法
公开(公告)号：US06868213B2
公开(公告)日：2005-03-15
申请号：US10121724
申请日：2002-04-15
申请人： Eisuke Sasaoka , Takemi Hasegawa , Masashi Onishi , Shinji Ishikawa
发明人： Eisuke Sasaoka , Takemi Hasegawa , Masashi Onishi , Shinji Ishikawa
IPC分类号： G02B6/02 , C03B37/15 , G02B6/032
CPC分类号： G02B6/02328 , C03B37/15 , C03B2203/16 , G02B6/02361 , G02B6/02366 , G02B6/02376 , G02B6/02385
摘要： The present invention provides an optical fiber which has a hollow portion extending along the axis and which reduces degradation of the optical characteristics, and a production method thereof. An optical fiber includes a hollow core portion, and a cladding portion which surrounds the hollow core portion. The refractive index of the hollow core portion is lower than that of the cladding portion. The hollow core portion is closed at both ends of the optical fiber so as to form sealed portions. The sealed portions are formed by, for example, heating the optical fiber and softening the cladding portion. This prevents foreign material and the like from entering the hollow core portion. Ferrules of optical connectors are attached to both end faces of the optical fiber.
摘要翻译：本发明提供一种光纤，该光纤具有沿轴线延伸的中空部分，并且减少了光学特性的劣化及其制造方法。光纤包括中空芯部分和围绕中空芯部分的包层部分。中空芯部的折射率低于包层部的折射率。中空芯部在光纤的两端封闭，形成密封部分。密封部分通过例如加热光纤并使包层部分软化而形成。这防止异物等进入中空芯部。光连接器的套圈连接到光纤的两个端面。

12. 发明授权

US06744954B1 Submarine optical cable, optical fiber unit employed in the submarine optical cable, and method of making optical fiber unit 有权
标题翻译：潜艇光缆，海底光缆中使用的光纤单元，以及制造光纤单元的方法
公开(公告)号：US06744954B1
公开(公告)日：2004-06-01
申请号：US09441559
申请日：1999-11-17
申请人： Shigeru Tanaka , Eisuke Sasaoka , Itaru Sakabe , Takeo Tsurumi , Yasushi Ito
发明人： Shigeru Tanaka , Eisuke Sasaoka , Itaru Sakabe , Takeo Tsurumi , Yasushi Ito
IPC分类号： G02B644
CPC分类号： G02B6/4427 , G02B6/4433
摘要： The present invention relates to a wide-band, low-loss, submarine optical cable excellent in productivity, an optical fiber unit employed in the submarine optical cable, and a method of making the optical fiber unit. The optical fiber unit employed in the submarine optical cable comprises a loose structure in which one or more coated optical fibers are accommodated together with a soft resin in a space formed within a plastic support. In particular, one or more compression members are embedded in the plastic support along the space accommodating the coated optical fibers. The compression members closely in contact with the plastic support prevents the shrinkage of the plastic support from occurring due to temperature changes before forming a cable utilizing the optical fiber unit. Preventing the shrinkage of the plastic support from occurring before forming the cable suppresses the increase in surplus length ratio of the accommodated coated optical fibers, thereby effectively restraining the transmission loss of the submarine optical cable from increasing due to the increase in surplus length ratio.
摘要翻译：本发明涉及生产率优良的宽带，低损耗海底光缆，在海底光缆中使用的光纤单元以及制造光纤单元的方法。在海底光缆中使用的光纤单元包括松散结构，其中一个或多个涂覆的光纤与柔性树脂一起容纳在形成在塑料支撑体内的空间中。特别地，一个或多个压缩构件沿着容纳涂覆光纤的空间嵌入在塑料支撑件中。紧密地与塑料支撑件接触的压缩构件防止在形成利用光纤单元的电缆之前由于温度变化而发生塑料支撑件的收缩。防止在形成电缆之前发生塑料支撑件的收缩，抑制了被容纳的被覆光纤的多余长度比的增加，从而有效地抑制了由于冗余长度比的增加导致的海底光缆的传输损耗的增加。

13. 发明授权

US06724525B2 Raman amplifying control unit and optical transmission system 失效
标题翻译：拉曼放大控制单元和光传输系统
公开(公告)号：US06724525B2
公开(公告)日：2004-04-20
申请号：US09788659
申请日：2001-02-21
申请人： Toshiaki Okuno , Eisuke Sasaoka , Masayuki Nishimura , Shigeru Tanaka
发明人： Toshiaki Okuno , Eisuke Sasaoka , Masayuki Nishimura , Shigeru Tanaka
IPC分类号： H01S300
CPC分类号： H01S3/302 , H01S3/0014 , H01S3/06754 , H01S3/1301 , H01S3/1305
摘要： Disclosed are an optical transmission system and a Raman amplifying control unit that can stabilize the effective loss of a transmission line even if the optical transmission system has a relay station between a transmitting station and a receiving station. The optical transmission system and the Raman amplifying control unit have an introducing means for outputting inspection light and introducing it to the transmission line, a receiving means for receiving the back-scatter from the inspection light, and a control means for inspecting the transmission line and controlling an exciting light supplying means according to the received backscattering light. The introducing means, the receiving means, and the control means are provided together with the exciting light supplying means in a station at the transmitting side or receiving side of a relay section in the optical transmission system.
摘要翻译：公开了一种光传输系统和拉曼放大控制单元，其即使光传输系统在发射站和接收站之间具有中继站，也可以稳定传输线的有效损耗。光传输系统和拉曼放大控制单元具有用于输出检查光并将其引入传输线的引入装置，用于从检查光接收反向散射的接收装置和用于检查传输线的控制装置和根据所接收的反向散射光控制激励光供给装置。引导装置，接收装置和控制装置与光传输系统中的中继部的发送侧或接收侧的站中的激励光供给装置一起设置。

14. 发明授权

US06711331B2 Optical fiber 失效
标题翻译：光纤
公开(公告)号：US06711331B2
公开(公告)日：2004-03-23
申请号：US10084667
申请日：2002-02-28
申请人： Eisuke Sasaoka , Shigeru Tanaka
发明人： Eisuke Sasaoka , Shigeru Tanaka
IPC分类号： G02B602
CPC分类号： G02B6/02009 , G02B6/02252 , G02B6/0228 , G02B6/03611 , G02B6/03633 , G02B6/03666
摘要： The present invention relates to an optical fiber having, at least, a structure for effectively restraining microbend loss from increasing. This optical fiber is an optical fiber suitable for a dispersion-flattened fiber, a dispersion-compensating fiber, and the like, and insured its single mode in a wavelength band in use. In particular, since the fiber diameter is 140 &mgr;m or more, this optical fiber has a high rigidity, so that the increase in microbend loss is effectively suppressed, whereas the probability of the optical fiber breaking due to bending stresses is practically unproblematic since the fiber diameter is 200 &mgr;m or less. Also, since this optical fiber has a larger mode field diameter, it lowers the optical energy density per unit cross-sectional area, thereby effectively restraining nonlinear optical phenomena from occurring.
摘要翻译：本发明涉及至少具有有效地抑制微弯损失增加的结构的光纤。该光纤是适用于分散平坦化光纤，色散补偿光纤等的光纤，并且在使用的波长带中保证其单一模式。特别是由于纤维直径为140μm以上，所以该光纤具有高刚性，有效地抑制了微弯损耗的增加，而由于弯曲应力而导致的光纤断裂的可能性实际上是不成问题的，因为纤维直径为200μm以下。此外，由于该光纤具有较大的模场直径，因此降低了每单位截面积的光能密度，从而有效地抑制非线性光学现象的发生。

15. 发明授权

US06704135B2 Operation mode switching apparatus, Raman amplifier and optical transmission system 有权
标题翻译：操作模式开关装置，拉曼放大器和光传输系统
公开(公告)号：US06704135B2
公开(公告)日：2004-03-09
申请号：US10007668
申请日：2001-12-10
申请人： Eisuke Sasaoka , Masayuki Nishimura
发明人： Eisuke Sasaoka , Masayuki Nishimura
IPC分类号： H01S300
CPC分类号： H01S3/302 , H01S3/1022
摘要： The present invention relates to an operation mode switching apparatus comprising a structure for making it possible to minimize the waste of energy caused by troubles occurring in optical fiber lines and the like in order to efficiently utilize the energy consumed in an optical transmission system aimed for a long-term operation; a Raman amplifier including the operation mode switching apparatus; and an optical transmission system including the Raman amplifier. If an optical fiber line acting as an optical transmission medium breaks in the optical transmission system, the signal power detected from the optical fiber decreases, whereby it changes to a set value or less or the amount of decrease in signal power per unit time changes by a set value or more. The operation mode switching apparatus comprises a control section for monitoring such a change in signal power, thereby switching the pumping light supply operation from a communication mode to a wait mode for minimizing the waste of pumping energy in response to the occurrence of troubles.
摘要翻译：本发明涉及一种操作模式切换装置，其包括一种结构，用于使由光纤线路等发生的故障所引起的能量的浪费最小化，从而有效地利用目的在于将光传输系统长期经营; 包括操作模式切换装置的拉曼放大器; 以及包括拉曼放大器的光传输系统。如果作为光传输介质的光纤线路在光传输系统中断裂，则从光纤检测到的信号功率减小，由此其变为设定值或更小或每单位时间的信号功率的减小量变化设定值以上。操作模式切换装置包括用于监视信号功率变化的控制部分，从而将泵送光供应操作从通信模式切换到等待模式，以便最小化响应于故障发生的泵送能量的浪费。

16. 发明授权

US06556755B2 Dispersion-equalizing optical fiber and optical transmission line including the same 有权
标题翻译：色散均衡光纤和包括其的光传输线
公开(公告)号：US06556755B2
公开(公告)日：2003-04-29
申请号：US09917744
申请日：2001-07-31
申请人： Masao Tsukitani , Eisuke Sasaoka , Shigeru Tanaka
发明人： Masao Tsukitani , Eisuke Sasaoka , Shigeru Tanaka
IPC分类号： G02B622
CPC分类号： G02B6/02009 , G02B6/02242 , G02B6/02261 , G02B6/03627 , G02B6/03644 , G02B6/03677 , G02B6/29377
摘要： The present invention relates to an optical transmission line enabling WDM communications in a wide signal light wavelength band centered at a wavelength of 1.55&mgr;m, in which nonlinear optical phenomena are less likely to occur; and an optical fiber constituting a part of the optical transmission line. The optical fiber has a dispersion D (unit:ps/nm/km) and a dispersion slope S (unit:ps/nm2/km) satisfying the conditions of −69≦D≦−35 and 0.0050×D≦5≦0.0025×D; and, as characteristics with respect to light having a wavelength of 1.55 &mgr;m an effective area of 15 &mgr;m2 or more and a bending loss of 50 dB/m or less when wound at a diameter of 20 mm.
摘要翻译：本发明涉及一种能够以1.55μm的波长为中心的宽信号光波长带内进行WDM通信的光传输线路，其中不太可能发生非线性光学现象; 以及构成光传输线路的一部分的光纤。光纤具有满足条件-69 <= D <= - 35和0.0050×D <= 5的条件的色散D（单位：ps / nm / km）和色散斜率S（单位：ps / nm2 / km） = 0.0025xD; 并且作为在波长为1.55μm的光的特性，当直径为20mm时的有效面积为15mum2以上，弯曲损耗为50dB / m以下。

17. 发明授权

US06498874B1 Optical transmission line 失效
标题翻译：光传输线
公开(公告)号：US06498874B1
公开(公告)日：2002-12-24
申请号：US09599265
申请日：2000-06-22
申请人： Takatoshi Kato , Eisuke Sasaoka , Masayuki Nishimura
发明人： Takatoshi Kato , Eisuke Sasaoka , Masayuki Nishimura
IPC分类号： G02B618
CPC分类号： G02B6/02009 , G02B6/02242 , G02B6/03644 , G02B6/03666 , G02B6/29377 , H04B10/2525
摘要： This invention relates to an optical transmission line having a structure that reduces dispersion with respect to signal light in a 1.55-&mgr;m band. Each transmission unit includes a dispersion-shifted optical fiber as a transmission medium and a mode removing unit for reducing the optical power of high-order modes excluding a fundamental mode of light signals propagating through the dispersion-shifted optical fiber. The dispersion-shifted optical fiber has an incident terminal on which the light signals are incident and an exit terminal from which the light signals are emitted, and has a cutoff wavelength longer than the wavelength of the light signals at a fiber length of 2 m. The mode removing unit has a structure for reducing the optical power of high-order modes to 1/10 or less, preferably 1/40 or less, of the optical power of the fundamental mode so as to satisfy the single-mode condition in relation to fiber length.
摘要翻译：本发明涉及一种光传输线路，其具有相对于1.55μm波段中的信号光减少色散的结构。每个发送单元包括作为传输介质的色散位移光纤和用于降低除通过色散位移光纤传播的基本模式的高阶模式的光功率的模式去除单元。色散位移光纤具有入射端子，光信号入射到入射端子，出射端子发光，并且具有比光纤长度为2μm的光信号的波长更长的截止波长。模式去除单元具有将高阶模式的光功率降低到基模的光功率的1/10以下，优选为1/40以下的结构，以满足关于单模状态的单模状态到纤维长度。

18. 发明授权

US06343175B1 Optical fiber with core containing chlorine and cladding containing fluorine and a method of manufacturing the same 有权
标题翻译：含有氯的芯和含氟的包层的光纤及其制造方法
公开(公告)号：US06343175B1
公开(公告)日：2002-01-29
申请号：US09615072
申请日：2000-07-12
申请人： Eisuke Sasaoka
发明人： Eisuke Sasaoka
IPC分类号： G02B602
CPC分类号： C03C13/046 , C03B37/01446 , C03B2201/12 , C03B2201/20 , C03B2203/22 , C03C3/06 , C03C13/045 , C03C2201/11 , C03C2201/12 , G02B6/02019 , G02B6/02257 , G02B6/02266 , G02B6/03627
摘要： This invention relates to an optical fiber having a structure that effectively reduces transmission loss and bending loss. An optical fiber according to this invention is an optical fiber mainly comprised of silica and including a core region and a cladding region covering the core region. The core region is doped with chlorine so as to have a refractive index higher than that of pure silica. The cladding region is doped with fluorine so as to have a refractive index lower than that of pure silica. The optical fiber, in particular, is characterized in that a peak value of a relative refractive index difference of the core region with respect to a refractive index of pure silica is 0.05% or more.
摘要翻译：本发明涉及具有有效降低传输损耗和弯曲损耗的结构的光纤。根据本发明的光纤是主要由二氧化硅组成并且包括芯区域和覆盖芯区域的包层区域的光纤。核心区域用氯掺杂，使其折射率高于纯二氧化硅的折射率。掺杂氟的包层区域的折射率低于纯二氧化硅的折射率。特别地，光纤的特征在于，核心区域相对于纯二氧化硅的折射率的相对折射率差的峰值为0.05％以上。

19. 发明授权

US06269211B1 Optical plane waveguide 有权
标题翻译：光学平面波导
公开(公告)号：US06269211B1
公开(公告)日：2001-07-31
申请号：US09518132
申请日：2000-03-03
申请人： Hitoshi Hatayama , Eisuke Sasaoka
发明人： Hitoshi Hatayama , Eisuke Sasaoka
IPC分类号： G02B610
CPC分类号： G02B6/1228 , G02B6/305
摘要： 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.
摘要翻译：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。

20. 发明授权

US6157754A Optical transmission line 失效
标题翻译：光传输线
公开(公告)号：US6157754A
公开(公告)日：2000-12-05
申请号：US75324
申请日：1998-05-11
申请人： Eisuke Sasaoka , Takatoshi Kato
发明人： Eisuke Sasaoka , Takatoshi Kato
IPC分类号： G02B6/00 , G02B6/02 , H04B10/25 , H04B10/2525 , G02B6/28
CPC分类号： H04B10/25253
摘要： 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.
摘要翻译：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。

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