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1. 发明授权

US06466721B1 Dispersion compensating optical fiber and optical transmission line 有权
标题翻译：色散补偿光纤和光传输线
公开(公告)号：US06466721B1
公开(公告)日：2002-10-15
申请号：US09618752
申请日：2000-07-18
申请人： Masao Tsukitani , Eisuke Sasaoka , Eiji Yanada , Yuichi Ohga
发明人： Masao Tsukitani , Eisuke Sasaoka , Eiji Yanada , Yuichi Ohga
IPC分类号： G02B622
CPC分类号： G02B6/03644 , G02B6/02019 , G02B6/02261 , G02B6/0228 , G02B6/0281 , G02B6/03627 , G02B6/29377
摘要： The present invention relates to an optical transmission line suitably used for a large-capacity high-speed WDM optical transmission system, and an optical fiber suitably used for such an optical transmission line. The optical transmission line is formed by connecting a single-mode optical fiber (SMF) and a dispersion compensating optical fiber (DCF). The dispersion compensating optical fiber has a dispersion value DDCF (unit: ps/nm/km) and dispersion slope SDCF (unit: ps/nm2/km) falling within the ranges of −82 ≦DDCF≦−29 and 0.0023×DDCF≦SDCF≦0.033+0.0015×DDCF at a wavelength of 1,550 nm, respectively. At the wavelength of 1,550 nm, the transmission loss is 0.5 dB/km or less. Letting LDCF be the length of the dispersion compensating optical fiber, and LSMF be the length of the single-mode optical fiber, the value LDCF/(LDCF+LSMF) in the optical transmission line is 0.2 to 0.4. This optical transmission line can suppress the nonlinear optical phenomenon and is suitable to long-distance large-capacity transmission because the optical transmission line has a small transmission loss and low nonlinear index.
摘要翻译：本发明涉及适用于大容量高速WDM光传输系统的光传输线，以及适用于这种光传输线的光纤。光传输线通过连接单模光纤（SMF）和色散补偿光纤（DCF）而形成。色散补偿光纤具有落在-82 <= DDCF <= - 29和0.0023×DDCF的范围内的色散值DDCF（单位：ps / nm / km）和色散斜率SDCF（单位：ps / nm2 / km） = SDCF <= 0.033 + 0.0015×DDCF，分别为1550nm波长。在1,550nm的波长下，传输损耗为0.5dB / km以下。使LDCF为色散补偿光纤的长度，LSMF为单模光纤的长度，光传输线路中的LDCF /（LDCF + LSMF）值为0.2〜0.4。该光传输线可以抑制非线性光学现象，适用于长距离大容量传输，因为光传输线路传输损耗小，非线性指数低。

2. 发明授权

US07194171B2 Dispersion compensating optical fiber, dispersion compensating device, optical transmission line and optical transmission system 有权
标题翻译：色散补偿光纤，色散补偿装置，光传输线路和光传输系统
公开(公告)号：US07194171B2
公开(公告)日：2007-03-20
申请号：US10401606
申请日：2003-03-31
申请人： Masao Tsukitani , Eisuke Sasaoka , Eiji Yanada , Yuichi Ohga
发明人： Masao Tsukitani , Eisuke Sasaoka , Eiji Yanada , Yuichi Ohga
IPC分类号： G02B6/02
CPC分类号： G02B6/03644 , G02B6/02004 , G02B6/02242 , G02B6/02261 , G02B6/03627
摘要： A dispersion compensating optical fiber comprises a minimum wavelength at which an increase amount of an actual loss value with respect to a theoretical loss value is not less than 10 mdB/km in a use wavelength band and on a long wavelength side of the use wavelength band. The actual loss value is measured in a state that the fiber is looped around a bobbin. The minimum wavelength falls within a range of 1,565 to 1,700 nm. This dispersion compensating optical fiber is suitably used for an optical transmission line of a large-capacity high-speed WDM optical transmission system.
摘要翻译：色散补偿光纤包括在使用波长带和使用波长带的长波长侧的实际损耗值相对于理论损耗值的增加量不小于10mdB / km的最小波长。实际损耗值是在纤维环绕绕线管的状态下测量的。最小波长在1,565至1,700nm的范围内。该色散补偿光纤适用于大容量高速WDM光传输系统的光传输线路。

3. 发明授权

US06853766B2 Dispersion-compensating module 失效
标题翻译：色散补偿模块
公开(公告)号：US06853766B2
公开(公告)日：2005-02-08
申请号：US10218491
申请日：2002-08-15
申请人： Masao Tsukitani , Eisuke Sasaoka , Toshiaki Okuno , Shigeru Tanaka
发明人： Masao Tsukitani , Eisuke Sasaoka , Toshiaki Okuno , Shigeru Tanaka
IPC分类号： G02B6/255 , G02B6/34 , G02B6/26
CPC分类号： G02B6/29394 , G02B6/2551
摘要： The present invention relates to a dispersion-compensating module having a structure which compensates for the dispersion of an optical transmission line in a wavelength band of 1.55 μm and adjusts loss fluctuations among wavelengths in the wavelength band of 1.55 μm into an appropriate range. The module comprises a structure adapted to be installed in an already installed optical fiber transmission line, and has a loss slope with a polarity opposite to that of the optical fiber transmission line in the wavelength band of 1.55 μm. An example of the module comprises a dispersion-compensating optical fiber as a dispersion-compensating device, and an optical fiber doped with a transition metal element as a loss-equalizing device. Consequently, the loss fluctuations among individual wavelengths in the whole transmission line including the dispersion-compensating module are adjusted by the loss-equalizing device in the dispersion-compensating module so as to fall within an appropriate range.
摘要翻译：本发明涉及一种具有补偿光传输线在1.55μm波段的色散的结构的色散补偿模块，并且将波长为1.55μm的波长之间的损耗波动调整到适当的范围内。该模块包括适于安装在已经安装的光纤传输线中的结构，并且具有与1.55μm波长带中的光纤传输线的极性相反的损耗斜率。该模块的一个例子包括作为色散补偿装置的色散补偿光纤，以及掺杂过渡金属元素作为损耗均衡装置的光纤。因此，通过色散补偿模块中的损耗均衡装置来调整包括色散补偿模块在内的整个传输线中的各个波长之间的损耗波动，使其落入适当的范围内。

4. 发明授权

US06574404B2 Choromatic dispersion compensating module and optical transmission system using the same 失效
标题翻译：合成色散补偿模块和光传输系统使用该模块
公开(公告)号：US06574404B2
公开(公告)日：2003-06-03
申请号：US09771937
申请日：2001-01-30
申请人： Eisuke Sasaoka , Masao Tsukitani , Shigeru Tanaka
发明人： Eisuke Sasaoka , Masao Tsukitani , Shigeru Tanaka
IPC分类号： G02B616
CPC分类号： H04B10/25133 , H04J14/02
摘要： The present invention is related to a chromatic dispersion compensating module which realizes signal transmission at a high bit rate by its simple constitution, and an optical transmission system comprising the same. The chromatic dispersion compensating module according to the present invention comprises a chromatic dispersion compensator which compensates for the chromatic dispersion of an optical fiber transmission line at a predetermined wavelength, and a temperature controller which controls the temperature of the chromatic dispersion compensator in such a manner to set the chromatic dispersion of the chromatic dispersion compensator at a desired value. By this constitution, the dispersion compensation control in correspondence with the chromatic dispersion fluctuation in the optical fiber transmission line caused by the temperature fluctuation and the like is made possible. Hence, the cumulative chromatic dispersion as viewed from the entire optical fiber transmission line can be effectively reduced by its simple constitution.
摘要翻译：本发明涉及一种通过其简单结构实现高比特率的信号传输的色散补偿模块和包括该色散补偿模块的光传输系统。根据本发明的色散补偿模块包括补偿预定波长的光纤传输线的色散的色散补偿器，以及以这种方式控制色散补偿器的温度的温度控制器，将色散补偿器的色散设定在期望值。通过这种结构，可以实现与由温度波动等引起的光纤传输线中的色散波动相对应的色散补偿控制。因此，通过简单的结构可以有效地降低从整个光纤传输线观察的累积色散。

5. 发明申请

US20060245689A1 Dispersion-compensating system 失效
公开(公告)号：US20060245689A1
公开(公告)日：2006-11-02
申请号：US11452958
申请日：2006-06-15
申请人： Masao Tsukitani , Eisuke Sasaoka , Toshiaki Okuno
发明人： Masao Tsukitani , Eisuke Sasaoka , Toshiaki Okuno
IPC分类号： G02B6/28
CPC分类号： G02B6/02223 , G02B6/02242 , G02B6/02261 , G02B6/03627 , G02B6/03633 , G02B6/03644 , G02B6/29317 , G02B6/29377 , G02B6/29394 , H04B10/25133 , H04B10/291 , H04B2210/258
摘要： In the dispersion-compensating system of the present invention, a demultiplexer demultiplexes optical signals in a signal wavelength band of 1520 nm to 1620 nm propagating through a first common transmission line into C band (1520 nm to 1565 nm) and L band (1565 nm to 1620 nm). Then, the demultiplexer outputs the optical signals of C band into a first branched transmission line and the optical signals of L band into a second branched transmission line. A first dispersion-compensating device is provided on the first common transmission line and compensates for the dispersion in C and L bands. A second dispersion-compensating device is provided on the second branched transmission line and compensates for the dispersion in L band, which has not fully been compensated for by the first dispersion-compensating device. Hence, the dispersion of optical transmission line can fully be reduced in a wide signal light wavelength band.

6. 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。

7. 发明授权

US06805497B1 Optical transmission line 失效
标题翻译：光传输线
公开(公告)号：US06805497B1
公开(公告)日：2004-10-19
申请号：US09869698
申请日：2001-07-03
申请人： Shinji Ishikawa , Motonori Nakamura , Masao Tsukitani , Eisuke Sasaoka
发明人： Shinji Ishikawa , Motonori Nakamura , Masao Tsukitani , Eisuke Sasaoka
IPC分类号： G02B6255
CPC分类号： G02B6/03694 , G02B6/03627 , G02B6/2551 , G02B6/29376 , G02B6/29377
摘要： An optical transmission line including a portion formed by fusion-splicing optical fibers having structures different from each other; wherein, in the optical fibers having structures different from each other, a first optical fiber 1 has a mode field diameter smaller than that of a second optical fiber 2 fusion-spliced thereto; and wherein the first optical fiber 1 has an average viscosity from a center to an outermost layer greater than that of the second optical fiber from a center to an outermost layer.
摘要翻译：一种光传输线，包括通过熔接具有彼此不同结构的光纤而形成的部分; 其中，在具有彼此不同的结构的光纤中，第一光纤1的模场直径小于与其熔接的第二光纤2的模场直径; 并且其中第一光纤1具有从中心到最外层的从中心到最外层的平均粘度大于第二光纤的平均粘度。

8. 发明授权

US06684017B1 Optical transmission line and optical transmission system including the same 有权
标题翻译：光传输线路和光传输系统包括相同
公开(公告)号：US06684017B1
公开(公告)日：2004-01-27
申请号：US10273360
申请日：2002-10-18
申请人： Masao Tsukitani , Eisuke Sasaoka
发明人： Masao Tsukitani , Eisuke Sasaoka
IPC分类号： G02B602
CPC分类号： G02B6/02009 , G02B6/02242 , G02B6/02261 , G02B6/03627 , G02B6/29377 , H04B10/2525
摘要： The present invention relates to an optical transmission line comprising a structure for effectively lowering both of nonlinearity and dispersion slope, and an optical transmission system including the same. The optical transmission line comprises, as a repeatered transmission line disposed between stations, a single-mode optical fiber having a zero-dispersion wavelength in a 1.3-&mgr;m wavelength band and a dispersion-compensating optical fiber for compensating for the chromatic dispersion of the single-mode optical fiber. The optical transmission line has an average dispersion slope Save of −0.0113 ps/nm2/km or more but 0.0256 ps/nm2/km or less at a wavelength of 1550 nm, and an equivalent effective area EAeff of 50 &mgr;m2 or more at the wavelength of 1550 nm, whereas the average dispersion slope Save and the equivalent effective area EAeff are designed so as to satisfy a predetermined condition such that the bending loss falls within a permissible range of 2 dB/m or more but 10 dB/m or less.
摘要翻译：本发明涉及一种包括用于有效降低非线性和色散斜率两者的结构的光传输线以及包括该光传输系统的光传输系统。光传输线包括作为站之间的中继传输线，具有1.3μm波长带中的零色散波长的单模光纤和用于补偿单色光的色散的色散补偿光纤模式光纤。光传输线在1550nm的波长下的平均色散斜率Save为-0.0113ps / nm 2 / km以上，但为0.0256ps / nm 2 / km以下，等效有效面积EAeff为50 mum <2>或更大，而平均色散斜率Save和等效有效面积EAeff被设计成满足预定条件，使得弯曲损耗落在2dB / m的允许范围内，或更多但是10dB / m以下。

9. 发明授权

US06496631B2 Optical transmission line and optical transmission system including the same 有权
公开(公告)号：US06496631B2
公开(公告)日：2002-12-17
申请号：US09792059
申请日：2001-02-26
申请人： Masao Tsukitani , Eisuke Sasaoka
发明人： Masao Tsukitani , Eisuke Sasaoka
IPC分类号： G02B602
CPC分类号： G02B6/03627 , G02B6/02014 , G02B6/02252 , G02B6/0228 , G02B6/29377 , H04B10/2525
摘要： The present invention relates to an optical transmission line comprising a structure for effectively lowering both of nonlinearity and dispersion slope, and an optical transmission system including the same. The optical transmission line comprises, as a repeating transmission line disposed between stations, a single-mode optical fiber having a zero-dispersion wavelength in a 1.3-&mgr;m wavelength band and a dispersion-compensating optical fiber for compensating for the chromatic dispersion of the single-mode optical fiber. The optical transmission line has an average dispersion slope Save of −0.0113 ps/nm2/km or more but 0.0256 ps/nm2/km or less at a wavelength of 1550 nm, and an equivalent effective area EAeff of 50 &mgr;m2 or more at the wavelength of 1550 nm, whereas the average dispersion slope Save and the equivalent effective area EAeff are designed so as to satisfy a predetermined condition such that the bending loss falls within a permissible range of 2 dB/m or more but 10 dB/m or less.

10. 发明授权

US06404950B1 Dispersion-compensating module 失效
标题翻译：色散补偿模块
公开(公告)号：US06404950B1
公开(公告)日：2002-06-11
申请号：US09452103
申请日：1999-12-02
申请人： Masao Tsukitani , Eisuke Sasaoka , Toshiaki Okuno , Shigeru Tanaka
发明人： Masao Tsukitani , Eisuke Sasaoka , Toshiaki Okuno , Shigeru Tanaka
IPC分类号： G02B626
CPC分类号： G02B6/29377 , G02B6/2551 , G02B6/29317 , G02B6/29394
摘要： The present invention relates to a dispersion-compensating module having a structure which compensates for the dispersion of an optical transmission line in a 1.55-&mgr;m wavelength band and adjusts loss fluctuations among signal wavelengths in the 1.55-&mgr;m wavelength band into an appropriate range. The dispersion-compensating module comprises a structure adapted to be installed in an already installed optical fiber transmission line, and has a loss slope with a polarity opposite to that of the optical fiber transmission line in the 1.55-&mgr;m wavelength band. One application of the dispersion-compensating module comprises a dispersion-compensating optical fiber as a dispersion-compensating device, and an optical fiber doped with a transition metal element as a loss-equalizing device. By the above configuration, the loss fluctuations among individual signal wavelengths in the whole transmission line including the dispersion-compensating module can be adjusted by the loss-equalizing device in the dispersion-compensating module so as to fail within an appropriate range.
摘要翻译：本发明涉及一种具有补偿光传输线在1.55μm波长带中的色散的结构的色散补偿模块，并将1.55μm波长带中的信号波长之间的损耗波动调整到适当的范围内。色散补偿模块包括适于安装在已经安装的光纤传输线中的结构，并且在1.55μm波长带中具有与光纤传输线的极性相反的损耗斜率。色散补偿模块的一个应用包括作为色散补偿装置的色散补偿光纤和掺杂有过渡金属元素作为损耗均衡装置的光纤。通过上述配置，可以通过色散补偿模块中的损耗均衡装置来调整包括色散补偿模块的整个传输线中各个信号波长之间的损耗波动，从而在适当的范围内失败。

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