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1. 发明授权

US06856738B2 Optical fiber and optical transmission system 失效
标题翻译：光纤和光传输系统
公开(公告)号：US06856738B2
公开(公告)日：2005-02-15
申请号：US09732725
申请日：2000-12-11
申请人： Takatoshi Kato , Shigeru Tanaka , Masashi Onishi , Yuji Kubo
发明人： Takatoshi Kato , Shigeru Tanaka , Masashi Onishi , Yuji Kubo
IPC分类号： G02B6/036 , G02B6/22
CPC分类号： G02B6/02009 , G02B6/02257 , G02B6/03644 , G02B6/03666
摘要： An optical fiber and an optical transmission system are provided which enable a large-volume and long-haul transmission, using light signals having a plurality of wavelengths in a wide range of wavelength bands including 1.31 μm band, 1.45 μm band, 1.55 μm band and 1.58 μm band. The chromatic dispersion of the optical fiber according to the present invention is −20 ps•nm−1•km−3 or more but −3 ps•nm−1•km−1 or less in the whole wavelength range of 1300 nm to 1600 nm. The optical transmission system according to the present invention is also equipped with (1) a plurality of transmitters to transmit light signals having wavelengths in the range of 1300 nm to 1600 nm, (2) an optical fiber of the present invention, and (3) receivers which receive the light signals.
摘要翻译：提供一种光纤和光传输系统，其使得能够进行大容量和长距离的传输，使用在宽范围的波段中具有多个波长的光信号，包括1.31个母带，1.45个母带，1.55个母带，以及 1.58个妈咪乐队。根据本发明的光纤的色散在-20ps.nm -1 -3km以上，但-3ps.nm -1 -1km以下。整个波长范围为1300 nm至1600 nm。根据本发明的光传输系统还配备有（1）多个发射机，用于发射波长在1300nm至1600nm范围内的光信号，（2）本发明的光纤和（3 ）接收器接收光信号。

2. 发明授权

US06490397B2 Optical fiber 有权
标题翻译：光纤
公开(公告)号：US06490397B2
公开(公告)日：2002-12-03
申请号：US09732933
申请日：2000-12-11
申请人： Takatoshi Kato , Masashi Onishi , Yuji Kubo
发明人： Takatoshi Kato , Masashi Onishi , Yuji Kubo
IPC分类号： G02B602
CPC分类号： G02B6/02009 , G02B6/02257 , G02B6/03666
摘要： An optical fiber whose chromatic dispersions have an opposite sign relative to those of the 1380 nm zero-dispersion fiber at all of the wavelengths in the range of 1450 nm to 1620 nm is provided. This optical fiber has negative chromatic dispersions at all of the wavelengths in this range and the values of which are −7 ps·nm−1·km−1 or more but −1 ps·nm−1·km−1 or less at a wavelength of 1450 nm, −12 ps·nm−1·km−1 or more but −5 ps·nm−1·km−1 or less at a wavelength of 1550 nm and −17 ps·nm−1·km−1 or more but −6 ps·nm−1·km−1 or less at a wavelength of 1620 nm. This optical fiber can compensate the dispersions of 1380 nm zero-dispersion fiber over the entire wavelength in this range.
摘要翻译：提供了一种光纤，其色调与1480nm至1620nm范围内的所有波长的1380nm零色散光纤具有相反的符号。该光纤在该范围内的所有波长处具有负色散，其值在-7ps.nm-1.km-1或更大但-1ps.nm-1.km-1或更低波长1450nm，波长1550nm -12ps.nm-1.km-1或-5ps.nm-1.km-1以下，-17ps.nm-1.km-1 或更多，但波长为1620nm时为-6ps.nm-1.km-1或更小。该光纤可以在此范围内补偿1380nm零色散光纤在整个波长上的分散。

3. 发明授权

US06748152B2 Optical transmission system 有权
标题翻译：光传输系统
公开(公告)号：US06748152B2
公开(公告)日：2004-06-08
申请号：US10098172
申请日：2002-03-15
申请人： Yuji Kubo , Masashi Onishi , Takatoshi Kato
发明人： Yuji Kubo , Masashi Onishi , Takatoshi Kato
IPC分类号： G02B602
CPC分类号： H04B10/2916 , G02B6/02242 , G02B6/02271
摘要： The optical transmission system in accordance with the present invention is an optical transmission system in which an optical fiber transmission line is laid between a transmitting station and a receiving station, first and second optical couplers are provided on the optical fiber transmission line, a first Raman amplification pumping light source is connected to the first optical coupler, a second Raman amplification pumping light source is connected to the second optical coupler, the optical fiber transmission line Raman-amplifies signal light in S band when Raman amplification pumping light is supplied thereto while transmitting the signal light, and the optical fiber transmission line has a zero-dispersion wavelength of 1350 nm to 1440 nm and a cable cutoff wavelength of less than 1368 nm.
摘要翻译：根据本发明的光传输系统是一种光传输系统，其中在发射站和接收站之间铺设光纤传输线，第一和第二光耦合器设置在光纤传输线上，第一拉曼放大泵浦光源连接到第一光耦合器，第二拉曼放大泵浦光源连接到第二光耦合器，当传输拉曼放大泵浦光时，光纤传输线拉曼放大S波段中的信号光信号光和光纤传输线具有1350nm至1440nm的零色散波长和小于1368nm的电缆截止波长。

4. 发明授权

US06567596B2 Optical fiber suitable for use in WDM transmission system 有权
标题翻译：光纤适用于WDM传输系统
公开(公告)号：US06567596B2
公开(公告)日：2003-05-20
申请号：US09732884
申请日：2000-12-11
申请人： Takatoshi Kato , Masashi Onishi , Yuji Kubo
发明人： Takatoshi Kato , Masashi Onishi , Yuji Kubo
IPC分类号： G02B602
CPC分类号： G02B6/02009 , G02B6/02242 , G02B6/03644 , G02B6/03666
摘要： An optical fiber that can sufficiently suppress the generation of four-wave mixing and that can widen the bandwidth of wavelength of signal light. The optical fiber of the present invention has (a) a chromatic dispersion whose absolute value is not less than 8 ps·nm−1·km−1 and not more than 15 ps·nm−1·km−1 at a wavelength of 1.55 &mgr;m and (b) a dispersion slope whose absolute value is not more than 0.05 ps·nm−2·km−1 at a wavelength of 1.55 &mgr;m. It is more desirable that the optical fiber have (a) a chromatic dispersion whose absolute value is not less than 8 ps·nm−1·km−1 and not more than 12 ps·nm−1·km−1 at a wavelength of 1.55 &mgr;m, (b) a dispersion slope whose absolute value is not more than 0.03 ps·nm−2·km−1 at a wavelength of 1.55 &mgr;m, (c) a chromatic dispersion whose absolute value is not less than 5 ps·nm−1·km−1 at wavelengths between 1.45 and 1.65 &mgr;m, (d) an effective area not less than 45 &mgr;m2 at a wavelength of 1.55 &mgr;m, and (e) a two-meter cutoff wavelength not less than 1.40 &mgr;m.
摘要翻译：可以充分抑制四波混频的产生并且可以加宽信号光的波长带宽的光纤。本发明的光纤具有（a）在1.55的波长下绝对值不小于8ps.nm-1.km-1且不大于15ps.nm-1.km-1的色散妈妈和（b）在1.55μm波长下绝对值不大于0.05ps.nm-2.km-1的色散斜率。更希望的是，光纤具有（a）绝对值不小于8ps.nm-1.km-1且不大于12ps.nm-1.km-1的波长的色散 1.55μm，（b）在1.55μm波长下绝对值不大于0.03ps.nm-2.km-1的色散斜率，（c）绝对值不小于5ps.nm的色散 -1.km-1，波长在1.45和1.65之间，（d）有效面积不小于45mum2，波长为1.55μm，（e）两米截止波长不小于1.40mum。

5. 发明授权

US06532331B1 Single-mode optical fiber floor long haul transmission 失效
标题翻译：单模光纤地板长途传输
公开(公告)号：US06532331B1
公开(公告)日：2003-03-11
申请号：US09698105
申请日：2000-10-30
申请人： Takatoshi Kato , Masashi Onishi , Eisuke Sasaoka
发明人： Takatoshi Kato , Masashi Onishi , Eisuke Sasaoka
IPC分类号： G02B602
CPC分类号： G02B6/03644 , G02B6/02014 , G02B6/02271 , G02B6/0283 , G02B6/03611 , G02B6/03627
摘要： The present invention relates to an optical fiber comprising a structure which effectively suppresses the occurrence of nonlinear phenomena without increasing transmission loss such as macrobending loss. The optical fiber according to the present invention comprises, radially in succession from the center axis thereof, a center region having a predetermined refractive index, a first annular region having a higher refractive index than the center region, and a second annular region doped with fluorine and having a lower refractive index than the first annular region. In particular, this optical fiber has an effective area of 70 &mgr;m2 or more with respect to light having a wavelength of 1550 nm, whereas the fluorine contents in the second annular region is adjusted such that the refractive index thereof decreases with distance from the center of the optical fiber.
摘要翻译：本发明涉及一种光纤，其包括有效抑制非线性现象的发生而不增加诸如宏弯损耗的传输损耗的结构。根据本发明的光纤从其中心轴径向连续地包括具有预定折射率的中心区域，具有比中心区域更高的折射率的第一环形区域和掺杂有氟的第二环形区域并且具有比第一环形区域更低的折射率。特别地，该光纤相对于波长为1550nm的光具有70mum2以上的有效面积，而第二环状区域中的氟含量被调整为使得其折射率随着距离光纤。

6. 发明授权

US06374027B1 Optical fiber transmission-line 失效
标题翻译：光纤传输线
公开(公告)号：US06374027B1
公开(公告)日：2002-04-16
申请号：US09636635
申请日：2000-08-11
申请人： Masashi Onishi , Masaaki Hirano , Takatoshi Kato
发明人： Masashi Onishi , Masaaki Hirano , Takatoshi Kato
IPC分类号： G02B602
CPC分类号： G02B6/02247 , G02B6/29377 , H04B10/25253
摘要： There is provided an optical fiber transmission-line with which the four-wave mixing generation can be suppressed effectively and also transmission loss is small. An optical fiber transmission-line 10 is dispersion-managed by a single silica optical fiber thereof being provided alternately in its longitudinal direction with parts 10a where the chromatic dispersion at the wavelength 1550 nm is positive and parts 10b where it is negative. In any one repeater span of the transmission-line there are at least four sign change positions P at which the sign of the chromatic dispersion changes in the longitudinal direction; the absolute value of the average changing rate of chromatic dispersion in each sign change locality A, each sign change locality A being a range including a sign change position P over which the absolute value of the chromatic dispersion is less than 2 ps/nm/km, is not less than 0.008 ps/nm/km/m and not greater than 4 ps/nm/km/m; the absolute value of the average value of the chromatic dispersion over the whole conduit is not greater than 2 ps/nm/km; the average value of the effective core area over the whole transmission-line is not less than 50 &mgr;m2; the average value of the transmission loss over the whole transmission-line is not greater than 0.25 dB/km; and the average value of the polarization mode dispersion over the whole transmission-line is not greater than 0.2 ps/km/½.
摘要翻译：提供了能够有效抑制四波混频发生的光纤传输线，并且传输损耗小。光纤传输线10由其单个二氧化硅光纤沿其纵向交替地与波长1550nm的色散为正的部分10a和其中为负的部分10b分散管理。在传输线的任何一个中继器跨度中，至少有四个符号改变位置P，其中色散的符号在纵向方向上变化; 每个符号改变位置A中的色散的平均变化率的绝对值，每个符号改变位置A是包括色散的绝对值小于2ps / nm / km的符号改变位置P的范围不小于0.008ps / nm / km / m且不大于4ps / nm / km / m; 整个导管上色散平均值的绝对值不大于2 ps / nm / km; 整个传输线有效核心区域的平均值不小于50 mum2; 整个传输线的传输损耗平均值不大于0.25 dB / km; 并且整个传输线上的偏振模色散的平均值不大于0.2ps / km /½。

7. 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。

8. 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。

9. 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.

10. 发明授权

US06266467B1 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：US06266467B1
公开(公告)日：2001-07-24
申请号：US09580483
申请日：2000-05-30
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.
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，从而实现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的有利的光通信。

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