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1. 发明授权

US06360046B1 Dispersion-shifted optical fiber 失效
标题翻译：色散位移光纤
公开(公告)号：US06360046B1
公开(公告)日：2002-03-19
申请号：US09560399
申请日：2000-04-28
申请人： Eisuke Sasaoka , Takatoshi Kato , Akira Urano , Yoshio Yokoyama
发明人： Eisuke Sasaoka , Takatoshi Kato , Akira Urano , Yoshio Yokoyama
IPC分类号： G02B602
CPC分类号： G02B6/03661 , G02B6/02014 , G02B6/02238 , G02B6/0281 , G02B6/0286 , G02B6/03611 , G02B6/03627
摘要： The present invention relates to a dispersion-shifted optical fiber which comprises a structure for effectively eliminating the causes of deterioration in characteristics at the making stage thereof and is suitable for wavelength division multiplexing transmission. In the dispersion-shifted optical fiber according to the present invention, impurities to be added and the contents thereof are adjusted so as to reduce viscosity difference at each interface between individual glass regions. As a consequence of this structure, occurrence of structural irregularity and glass defect are effectively restrained in the vicinity of the interfaces between the regions.
摘要翻译：色散位移光纤技术领域本发明涉及一种色散位移光纤，其特征在于，具有有效地消除其制造阶段的特性恶化的结构，适用于波分复用传输。在根据本发明的色散位移光纤中，调节添加的杂质和其含量，以便降低各个玻璃区域之间的每个界面处的粘度差异。作为这种结构的结果，在区域之间的界面附近有效地抑制了结构不规则性和玻璃缺陷的发生。

2. 发明授权

US06275638B1 Dispersion-shifted fiber 失效
标题翻译：色散位移光纤
公开(公告)号：US06275638B1
公开(公告)日：2001-08-14
申请号：US09297465
申请日：1999-04-28
申请人： Eisuke Sasaoka , Takatoshi Kato , Yoshio Yokoyama , Akira Urano
发明人： Eisuke Sasaoka , Takatoshi Kato , Yoshio Yokoyama , Akira Urano
IPC分类号： G02B622
CPC分类号： G02B6/02238 , G02B6/02014 , G02B6/03611 , G02B6/03627 , G02B6/03633
摘要： A dispersion-shifted fiber includes structure configured to effectively reduce nonlinear optical effects and transmission loss caused by structural mismatching. A core region in the dispersion-shifted fiber includes an inner core and an outer core, which are both glass areas. The inner core is doped with a predetermined amount of fluorine, having an average relative refractive index difference &Dgr;n1. The outer core is disposed between the inner core and the cladding region and is doped with a predetermined amount of germanium dioxide, having an average relative refractive index difference &Dgr;n2(&Dgr;n2>&Dgr;n1), such that the viscosity ratio between the inner core and the outer core at a drawing temperature is set within a predetermined range, thereby effectively restraining structural mismatching from occurring at the boundary between these glass regions.
摘要翻译：色散位移光纤包括有效地减少由结构不匹配引起的非线性光学效应和传输损耗的结构。色散位移光纤中的核心区域包括两个玻璃区域的内芯和外芯。内核掺杂有预定量的氟，具有平均相对折射率差ΔTATAn1。外芯设置在内芯和包层区之间，并掺杂预定量的具有平均相对折射率差DELTAn2（DELTAn2> DELTAn1）的二氧化锗，使得内芯和外层之间的粘度比芯在拉伸温度下设定在预定范围内，从而有效地抑制在这些玻璃区域之间的边界处发生结构失配。

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

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。

5. 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.

6. 发明授权

US06335995B1 Dispersion-shifted fiber 有权
标题翻译：色散位移光纤
公开(公告)号：US06335995B1
公开(公告)日：2002-01-01
申请号：US09488643
申请日：2000-01-21
申请人： Takatoshi Kato , Eisuke Sasaoka , Shinji Ishikawa
发明人： Takatoshi Kato , Eisuke Sasaoka , Shinji Ishikawa
IPC分类号： G02B602
CPC分类号： G02B6/02014 , C03B37/01446 , C03B37/01466 , C03B2201/12 , C03B2201/31 , C03B2203/22 , C03B2203/36 , G02B6/02238 , G02B6/02271 , G02B6/0228 , G02B6/0365 , G02B6/03666
摘要： The present invention aims to provide a dispersion-shifted fiber which can effectively restrain nonlinear optical effects from occurring and has a configuration suitable for long-haul light transmission. The dispersion-shifted fiber has, as various characteristics at a wavelength of 1,550 nm, a dispersion level of 1.0 to 4.5 ps/nm/km in terms of absolute value, a dispersion slope not greater than 0.13 ps/nm2/km in terms of absolute value, an effective core cross-sectional area not less than 70 &mgr;m2, and a transmission loss not greater than 0.25 dB/km with respect to light in a 1.55-&mgr;m wavelength band.
摘要翻译：本发明的目的在于提供一种可以有效地抑制非线性光学效应发生并具有适于长距离透光的结构的色散位移光纤。色散位移光纤作为波长为1,550nm的各种特性具有以绝对值表示的1.0至4.5ps / nm / km的色散水平，不大于0.13ps / nm 2 / km的色散斜率绝对值，有效芯截面积不小于70mum2，相对于1.55μm波长带中的光的传输损耗不大于0.25dB / km。

7. 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。

8. 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。

9. 发明授权

US06229946B1 Dispersion-shifted optical fiber 失效
标题翻译：色散位移光纤
公开(公告)号：US06229946B1
公开(公告)日：2001-05-08
申请号：US09541912
申请日：2000-04-03
申请人： Eisuke Sasaoka , Takatoshi Kato
发明人： Eisuke Sasaoka , Takatoshi Kato
IPC分类号： G02B602
CPC分类号： G02B6/03644 , G02B6/02014 , G02B6/02219 , G02B6/02276 , G02B6/03611 , G02B6/03627 , G02B6/03633
摘要： The present invention relates to a dispersion-shifted optical fiber comprising a structure for reducing optical loss and restraining nonlinear phenomena from occurring. In order to restrain the nonlinear phenomena from occurring, this dispersion-shifted optical fiber has an effective area of 70 &mgr;m2 or more with respect to light whose center wavelength falls within the range of 1500 to 1600 nm, and the peak position where optical power of the light in a fundamental mode is maximized is radially shifted from a center of a core region by a predetermined distance. Also, in this dispersion-shifted optical fiber, optical power at a position radially separated from the peak position by a distance which is five times the center wavelength of the light becomes {fraction (1/100)} or less of the optical power at the peak position. As a consequence of this structure, bending loss can effectively be reduced.
摘要翻译：本发明涉及一种色散位移光纤，包括用于减少光损耗并抑制非线性现象的结构。为了抑制非线性现象的发生，该色散位移光纤相对于中心波长在1500〜1600nm的范围内的光的有效面积为70mum2以上，光功率的峰值位置基本模式的光最大化从芯区域的中心径向偏移预定距离。此外，在这种色散位移光纤中，与峰值位置放射性分离距离为光的中心波长的五倍的位置处的光功率为{分数（1/100）}以下的光功率的{分数（1/100）}以下峰值位置。作为这种结构的结果，可以有效地减少弯曲损耗。

10. 发明授权

US06169837A Dispersion-flattened optical fiber 有权
标题翻译：色散扁平光纤
公开(公告)号：US06169837A
公开(公告)日：2001-01-02
申请号：US09341310
申请日：1999-07-08
申请人： Takatoshi Kato , Hitoshi Hatayama , Eisuke Sasaoka , Masayuki Nishimura
发明人： Takatoshi Kato , Hitoshi Hatayama , Eisuke Sasaoka , Masayuki Nishimura
IPC分类号： G02B602
CPC分类号： G02B6/02009 , G02B6/02233 , G02B6/02242 , G02B6/03611 , G02B6/03627 , G02B6/03644 , G02B6/03666
摘要： The present invention aims at providing a dispersion-flattened optical fiber which is suitable for wavelength-division multiplexing soliton transmission utilizing an optical amplifier and the like and has a structure for effectively restraining nonlinear optical phenomena from occurring. The dispersion-flattened optical fiber according to the present invention has, as characteristics at a wavelength of 1550 nm, a dispersion with an absolute value of 5 ps/nm/km or less, an effective cross-sectional area of 45 &mgr;n 2 or more, a dispersion slope of 0.03 ps/nm2/km or less, and a cutoff wavelength of 1.0 &mgr;m or more at a length of 2 m.
摘要翻译：本发明的目的在于提供一种适用于利用光放大器等进行波分复用孤子传输的色散平坦光纤，具有有效抑制非线性光学现象发生的结构。本发明的色散平坦化光纤作为1550nm波长的特性，具有绝对值为5ps / nm / km以下的色散，有效截面积为45mb 2以上，0.03ps / nm 2 / km以下的色散斜率，2μm长度的截止波长为1.0μm以上。

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