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31. 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。

32. 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。

33. 发明授权

US06483970B2 Fiber optic cable and optical transmission system 有权
标题翻译：光缆和光传输系统
公开(公告)号：US06483970B2
公开(公告)日：2002-11-19
申请号：US09768353
申请日：2001-01-25
申请人： Takatoshi Kato , Masayuki Nishimura
发明人： Takatoshi Kato , Masayuki Nishimura
IPC分类号： G02B644
CPC分类号： G02B6/02219 , G02B6/02271 , G02B6/03627 , G02B6/03633 , G02B6/03666 , G02B6/29377 , G02B6/4407 , G02B6/4411
摘要： A fiber optic cable is provided which can perform a long-distance signal light transmission at high bit rates even if any temporal temperature change or regional temperature difference occurs. Also provided is an optical transmission system in which signal light can be transmitted at high bit rates over a long distance, from a transmitting station to a receiving station, even if a temporal temperature change or a regional temperature difference occurs to the fiber optic cables installed between the transmitting station and the receiving station. The fiber optic cable comprises a plurality of optical fibers bundled therein having an absolute value of 0.001 ps·nm−1·km31 1·K−1 or less, more preferably 0.0005 ps·nm−1·km−1·K−1 or less, of chromatic dispersion variation quantity per unit temperature at a wavelength of 1550 nm. The fiber optic cable preferably has a loose tubal structure or loose slotted structure.
摘要翻译：提供一种光纤电缆，其可以以高比特率执行远距离信号光传输，即使发生任何时间温度变化或区域温差。还提供了一种光传输系统，其中信号光可以从发射站到接收站在长距离上以高比特率传输，即使安装的光纤电缆发生时间温度变化或区域温差在发送站和接收站之间。光纤电缆包括其中绝对值为0.001ps.nm-1.km31的多个光纤1.K-1或更小，更优选为0.0005ps.nm-1.km-1.K-1或在1550nm的波长下，单位温度的色散变化量少。光纤电缆优选地具有松散的输卵管结构或松散的开槽结构。

34. 发明授权

US06477306B2 Dispersion-compensating optical fiber, and, optical transmission line and dispersion-compensating module respectively including the same 有权
标题翻译：色散补偿光纤，以及分别包括其的光传输线路和色散补偿模块
公开(公告)号：US06477306B2
公开(公告)日：2002-11-05
申请号：US09735888
申请日：2000-12-14
申请人： Takatoshi Kato , Masaaki Hirano
发明人： Takatoshi Kato , Masaaki Hirano
IPC分类号： G02B602
CPC分类号： G02B6/0228 , G02B6/02004 , G02B6/02261 , G02B6/03627 , G02B6/03644 , G02B6/29377
摘要： The invention is directed to a dispersion-compensating optical fiber which can compensate for the chromatic dispersion and dispersion slope of a non-zero dispersion-shifted optical fiber by a short length. The dispersion-shifted optical fiber constitutes an optical transmission line together with a dispersion-compensating optical fiber fusion-spliced thereto. The dispersion-compensating optical fiber has, at a wavelength of 1550 nm, a chromatic dispersion DDCF of −40 ps/nm/km or less and a ratio (DDCF/SDCF) of dispersion slope SDCF to the chromatic dispersion DDCF of 0.005/nm or more.
摘要翻译：本发明涉及一种色散补偿光纤，其可以通过短长度补偿非零色散位移光纤的色散和色散斜率。色散位移光纤与其中熔融熔接的色散补偿光纤一起构成光传输线。色散补偿光纤在波长1550nm处具有-40ps / nm / km或更小的色散DDCF和色散斜率SDCF与色散DDCF的比率（DDCF / SDCF）为0.005 / nm 或者更多。

35. 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。

36. 发明授权

US06369676B2 High-frequency module 失效
标题翻译：高频模块
公开(公告)号：US06369676B2
公开(公告)日：2002-04-09
申请号：US09240241
申请日：1999-01-29
申请人： Koichi Sakamoto , Sadao Yamashita , Takatoshi Kato , Yasutaka Fujii , Kenichi Iio , Toshiro Hiratsuka
发明人： Koichi Sakamoto , Sadao Yamashita , Takatoshi Kato , Yasutaka Fujii , Kenichi Iio , Toshiro Hiratsuka
IPC分类号： H01P710
CPC分类号： H03B5/1876 , H03B5/1852 , H03B2200/0024 , H03B2200/004 , H03B2201/0208
摘要： A high-frequency module which includes a dielectric resonator defined by a dielectric sheet; a pair of electrodes formed on each of the main surfaces of the dielectric sheet and having aligned openings which form a dielectric resonator; a substrate stacked on the sheet; and lines disposed on the substrate for being coupled to the dielectric resonator. At least one of the lines is curved and is disposed just inside the opening and runs substantially along the edges of the openings.
摘要翻译：一种高频模块，包括由电介质片限定的介质谐振器; 一对电极，形成在电介质片的每个主表面上并具有形成介质谐振器的对准的开口; 堆叠在片材上的衬底; 以及设置在所述基板上用于耦合到所述介质谐振器的线。线中的至少一条是弯曲的并且刚好位于开口内部并且基本沿着开口的边缘延伸。

37. 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。

38. 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。

39. 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。

40. 发明授权

US6072929A Dispersion-shifted fiber 失效
标题翻译：色散位移光纤
公开(公告)号：US6072929A
公开(公告)日：2000-06-06
申请号：US998425
申请日：1997-12-24
申请人： Takatoshi Kato , Eisuke Sasaoka , Shinji Ishikawa
发明人： Takatoshi Kato , Eisuke Sasaoka , Shinji Ishikawa
IPC分类号： C03B37/014 , G02B6/02
CPC分类号： G02B6/02014 , C03B37/01446 , C03B37/01466 , G02B6/02238 , G02B6/02271 , G02B6/0228 , G02B6/0365 , G02B6/03666 , C03B2201/12 , C03B2201/31 , C03B2203/22 , C03B2203/36
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/nm.sup.2 /km in terms of absolute value, an effective core cross-sectional area not less than 70 .mu.m.sup.2, and a transmission loss not greater than 0.25 dB/km with respect to light in a 1.55-.mu.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的色散斜率相对于1.55μm波段的光，绝对值，有效芯截面积不小于70μm2，传输损耗不大于0.25dB / km。

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