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1. 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。

2. 发明授权

US07043131B2 Optical device and a making method thereof 失效
公开(公告)号：US07043131B2
公开(公告)日：2006-05-09
申请号：US10217433
申请日：2002-08-14
申请人： Yasushi Koyano , Eisuke Sasaoka , Shigeru Tanaka , Kohei Kobayashi , Masashi Onishi , Kenji Tamano , Takashi Fujii
发明人： Yasushi Koyano , Eisuke Sasaoka , Shigeru Tanaka , Kohei Kobayashi , Masashi Onishi , Kenji Tamano , Takashi Fujii
IPC分类号： G02B6/00
CPC分类号： G02B6/4457 , G02B6/02214 , G02B6/02261 , G02B6/02395 , G02B6/03627 , Y10T428/2933
摘要： After a wide-band DCF is wound around a bobbin to form an optical fiber coil 32, the latter is removed from the bobbin and placed into a bundle state (the state where the increase in transmission loss in the wavelength band of 1.55 μm caused by distortions in winding is reduced by 0.1 dB/km or more) released from distortions in winding. A resin 42 is used as a coil-tidying member so as to secure the optical fiber coil 32 to a storage case 40 at four positions. Both ends of the optical fiber coil 32 are connected to pigtail fibers at fusion-splicing parts 44, respectively. Even when the storage case 40 is closed with a lid after the optical fiber coil 32 is secured to the storage case 40 with the resin 42, there remain interstices within the bundle of the optical fiber coil 32 and a space between the optical fiber coil 32 and the storage case 40. As a result, even when the optical fiber coil 32 in a bundle state is accommodated in the storage case 40, transmission loss and the like would not increase.

3. 发明授权

US06859595B2 Optical fiber and optical transmission system including the same 有权
标题翻译：光纤和光传输系统包括相同的
公开(公告)号：US06859595B2
公开(公告)日：2005-02-22
申请号：US10162188
申请日：2002-06-05
申请人： Takatoshi Kato , Eisuke Sasaoka , Shigeru Tanaka
发明人： Takatoshi Kato , Eisuke Sasaoka , Shigeru Tanaka
IPC分类号： G02B6/02 , G02B6/036 , H04B10/25 , H04B10/2507 , H04B10/2525 , H04B10/2543 , H04J14/00 , H04J14/02 , G02B6/16
CPC分类号： G02B6/036 , G02B6/02019 , G02B6/02223 , G02B6/02242 , G02B6/02271 , G02B6/0281 , G02B6/03611 , G02B6/03627 , G02B6/03633 , G02B6/03644 , G02B6/0365 , G02B6/03666
摘要： The present invention relates to an optical fiber which enables favorable optical communications in 1.3-μm and 1.55-μm wavelength bands, and an optical transmission system including the same. The optical fiber according to the present invention has only one zero-dispersion wavelength within a wavelength range of 1.20 μm to 1.60 μm, the zero-dispersion wavelength existing within a wavelength range of 1.37 μm to 1.50 μm , and has a positive dispersion slope at the zero-dispersion wavelength, thereby enabling favorable optical communications utilizing each signal light in the 1.3-μm and 1.55-μm wavelength bands sandwiching the zero-dispersion wavelength.
摘要翻译：本发明涉及能够在1.3μm和1.55μm波长带中实现良好的光通信的光纤，以及包括该光纤的光传输系统。根据本发明的光纤在1.20μm至1.60μm的波长范围内仅具有一个零色散波长，零色散波长存在于1.37μm至1.50μm的波长范围内，并且具有正色散斜率零色散波长，从而能够利用夹着零色散波长的1.3μm和1.55μm波长带中的每个信号光进行良好的光通信。

4. 发明授权

US06782151B2 Raman amplifier, optical transmission system and optical fiber 失效
标题翻译：拉曼放大器，光传输系统和光纤
公开(公告)号：US06782151B2
公开(公告)日：2004-08-24
申请号：US09752526
申请日：2001-01-03
申请人： Eisuke Sasaoka , Masayuki Nishimura , Shigeru Tanaka
发明人： Eisuke Sasaoka , Masayuki Nishimura , Shigeru Tanaka
IPC分类号： G02B642
CPC分类号： G02B6/29377 , H01S3/094003 , H01S3/302 , H04B10/2525 , H04B10/2916 , H04B2210/003
摘要： A Raman amplifier having a great Raman amplification gain is disclosed. An optical transmission system 1 is provided with an optical fiber 31 for Raman amplification and an optical multiplexer 41 between a transmitter 10 and a receiver 20 in the order of enumeration, and further provided with a pump light source 51 for Raman amplification that is connected with the optical multiplexer 41. The wavelength of signal light to be transmitted from the transmitter 10 to the receiver 20 is at 1.65 &mgr;m band, and the wavelength of the pump light that is output from the light source 51 is C-band or L-band. Since the pump light for Raman amplification propagates at a low loss through the optical fiber for Raman amplification, a great Raman amplification gain can be attained by the Raman amplifier.
摘要翻译：公开了具有很大拉曼放大增益的拉曼放大器。光传输系统1按照枚举方式设置有用于拉曼放大的光纤31和发射机10和接收机20之间的光复用器41，并且还设置有用于拉曼放大的泵浦光源51，其与从发射机10发射到接收机20的信号光的波长为1.65mum的波段，从光源51输出的泵浦光的波长为C波段或L波段。由于拉曼放大的泵浦光通过用于拉曼放大的光纤以低损耗传播，所以通过拉曼放大器可以获得很大的拉曼放大增益。

5. 发明授权

US06650821B1 Optical device and a making method thereof 失效
标题翻译：光学装置及其制造方法
公开(公告)号：US06650821B1
公开(公告)日：2003-11-18
申请号：US09477561
申请日：2000-01-04
申请人： Yasushi Koyano , Eisuke Sasaoka , Shigeru Tanaka , Kohei Kobayashi , Masashi Onishi , Kenji Tamano , Takashi Fujii
发明人： Yasushi Koyano , Eisuke Sasaoka , Shigeru Tanaka , Kohei Kobayashi , Masashi Onishi , Kenji Tamano , Takashi Fujii
IPC分类号： G02B600
CPC分类号： G02B6/4457 , G02B6/02214 , G02B6/02261 , G02B6/02395 , G02B6/03627 , Y10T428/2933
摘要： After a wide-band DCF is wound around a bobbin to form an optical fiber coil 32, the latter is removed from the bobbin and placed into a bundle state (the state where the increase in transmission loss in the wavelength band of 1.55 &mgr;m caused by distortions in winding is reduced by 0.1 dB/km or more) released from distortions in winding. A resin 42 is used as a coil-tidying member so as to secure the optical fiber coil 32 to a storage case 40 at four positions. Both ends of the optical fiber coil 32 are connected to pigtail fibers at fusion-splicing parts 44, respectively. Even when the storage case 40 is closed with a lid after the optical fiber coil 32 is secured to the storage case 40 with the resin 42, there remain interstices within the bundle of the optical fiber coil 32 and a space between the optical fiber coil 32 and the storage case 40. As a result, even when the optical fiber coil 32 in a bundle state is accommodated in the storage case 40, transmission loss and the like would not increase.
摘要翻译：在宽带DCF缠绕在线轴上以形成光纤线圈32之后，将其从线轴上取下并放置成捆状态（由1.55μm的波长带的传输损耗的增加引起的状态绕组失真减少了0.1 dB / km以上）。树脂42用作线圈整理构件，以将光纤线圈32固定在四个位置处的存储盒40上。光纤线圈32的两端分别在熔接部分44处连接到尾纤。即使当光纤线圈32用树脂42固定在存储盒40上之后，当用盖子封闭存储盒40时，在光纤线圈32的束内仍然有空隙，并且光纤线圈32之间的空间结果，即使束状态的光纤线圈32被容纳在收容箱40中，传输损耗等也不会增加。

6. 发明授权

US06535677B1 Dispersion-managed optical fiber, method of manufacturing the same, optical communication system including the same and optical fiber preform therefor 有权
标题翻译：色散管理光纤，其制造方法，包括该光纤的光通信系统和光纤预制棒
公开(公告)号：US06535677B1
公开(公告)日：2003-03-18
申请号：US09668347
申请日：2000-09-25
申请人： Shigeru Tanaka , Masayuki Nishimura , Shinji Ishikawa , Eisuke Sasaoka , Takatoshi Kato
发明人： Shigeru Tanaka , Masayuki Nishimura , Shinji Ishikawa , Eisuke Sasaoka , Takatoshi Kato
IPC分类号： G02B602
CPC分类号： G02B6/02242 , C03B37/0253 , C03B37/027 , C03B37/02745 , C03B37/032 , C03B2201/31 , C03B2203/19 , C03B2203/22 , C03B2203/36 , C03B2205/06 , C03B2205/40 , C03B2205/72 , C03C25/1062 , C03C25/223 , G02B6/02247 , G02B6/02257 , G02B6/02271 , G02B6/03627 , G02B6/03633 , G02B6/03644 , G02B6/0365 , G02B6/03666 , G02B6/29377
摘要： The present invention relates to a dispersion-managed optical fiber which can be manufactured easily and has a structure which enables the easy connection thereof with other optical fiber and the like. The dispersion-managed optical fiber is a silica-based optical fiber ensuring its single mode at a predetermined wavelength within a signal wavelength band, in which first portions each having a positive chromatic dispersion and second portions each having a negative chromatic dispersion are arranged alternately and adjacent to each other. In the dispersion-managed optical fiber, the dopant concentration is made uniform in the longitudinal direction and, corresponding to the above-mentioned first and second portions, the refractive index of a glass layer not doped with GeO2 as a dopant is adjusted or the residual stresses in glass layers are changed.
摘要翻译：本发明涉及一种易于制造的色散管理光纤，并且具有能够容易地与其他光纤等连接的结构。色散管理光纤是一种二氧化硅基光纤，其确保在信号波长带内的预定波长的单模，其中每个具有正色散的第一部分和每个具有负色散的第二部分交替排列，相邻。在色散管理的光纤中，掺杂剂浓度在纵向上均匀，并且对应于上述第一和第二部分，调整未掺杂有GeO 2作为掺杂剂的玻璃层的折射率或残余物玻璃层的应力发生变化。

7. 发明授权

US06415089B2 Optical fiber and optical transmission system including the same 有权
公开(公告)号：US06415089B2
公开(公告)日：2002-07-02
申请号：US09919904
申请日：2001-08-02
申请人： Takatoshi Kato , Eisuke Sasaoka , Shigeru Tanaka
发明人： Takatoshi Kato , Eisuke Sasaoka , Shigeru Tanaka
IPC分类号： G02B616
CPC分类号： G02B6/036 , G02B6/02019 , G02B6/02223 , G02B6/02242 , G02B6/02271 , G02B6/0281 , G02B6/03611 , G02B6/03627 , G02B6/03633 , G02B6/03644 , G02B6/0365 , G02B6/03666
摘要： The present invention relates to an optical fiber which enables favorable optical communications in 1.3-&mgr;m and 1.55-&mgr;m wavelength bands, and an optical transmission system including the same. The optical fiber according to the present invention has only one zero-dispersion wavelength within a wavelength range of 1.20 &mgr;m to 1.60 &mgr;m, the zero-dispersion wavelength existing within a wavelength range of 1.37 &mgr;m to 1.50 &mgr;m, and has a positive dispersion slope at the zero-dispersion wavelength, thereby enabling favorable optical communications utilizing each signal light in the 1.3-&mgr;m and 1.55-&mgr;m wavelength bands sandwiching the zero-dispersion wavelength.

8. 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。

9. 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。

10. 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。

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