公开(公告)号：US07202994B2

公开(公告)日：2007-04-10

申请号：US10804174

申请日：2004-03-19

申请人： Toshiaki Okuno ,  Masaaki Hirano ,  Takatoshi Kato

发明人： Toshiaki Okuno ,  Masaaki Hirano ,  Takatoshi Kato

IPC分类号： G02F1/365

CPC分类号： G02B6/02242 ,  G02B6/02004 ,  G02B6/0281 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03666 ,  G02F1/3536 ,  G02F1/365

摘要： The present invention relates to a wavelength converter of structure enabling generation of converted light with high power even with a large difference between the wavelength of pumping light and the zero-dispersion wavelength. The wavelength converter includes an optical fiber having a dispersion slope whose absolute value at the wavelength of 1550 nm is 0.01 ps/nm2/km or less, for example.

摘要翻译： 本发明涉及一种波长转换器，其结构能够即使在泵浦光的波长和零色散波长之间具有大的差异的情况下也能够产生具有高功率的转换光。 波长转换器包括例如具有波长1550nm的绝对值为0.01ps / nm 2 / km以下的色散斜率的光纤。

公开(公告)号：US06181858B2

公开(公告)日：2001-01-30

申请号：US09022033

申请日：1998-02-11

申请人： Takatoshi Kato ,  Toshiaki Okuno ,  Eisuke Sasaoka

发明人： Takatoshi Kato ,  Toshiaki Okuno ,  Eisuke Sasaoka

IPC分类号： G02B616

CPC分类号： G02B6/03644 ,  G02B6/02014 ,  G02B6/02242 ,  G02B6/03611 ,  G02B6/03627

摘要： The present invention provides a dispersion-shifted fiber which can effectively restrain nonlinear optical effects from occurring and is suitable for long-haul transmission. As characteristics at a wavelength of 1,550 nm, this dispersion-shifted fiber has a dispersion whose absolute value is from 1.0 to 4.5 ps/nm/km, an effective core cross-sectional area of at least 70 &mgr;m2, a cutoff wavelength of at least 1,300 nm at a fiber length of 2 m, and a dispersion slope of 0.05 to 0.09 ps/nm2/km. Also, in this dispersion-shifted fiber, the position where the optical power distribution in the fundamental mode of the signal light is maximized is radially separated from the center of the core region by a predetermined distance, and, when the optical power in the fundamental mode of signal light at the center of core region is P0, and the maximum value of the optical power distribution in the fundamental mode is P1, the maximum value P1 is greater than the value of 1.2 times the optical power P0 at the center of core region.

摘要翻译： 本发明提供一种可以有效地抑制非线性光学效应发生并适合长距离传输的色散位移光纤。 作为波长为1,550nm的特性，该色散位移光纤的绝对值为1.0〜4.5ps / nm / km，有效芯截面积为70μm2以上，截止波长至少为 纤维长度为2μm的1,300nm，色散斜率为0.05〜0.09ps / nm 2 / km。 此外，在这种色散位移光纤中，信号光的基模中的光功率分布最大的位置与芯区的中心径向分开预定的距离，并且当基波中的光功率 核心区域中心的信号光模式为P0，基模光功率分布的最大值为P1，最大值P1大于核心中心光功率P0的1.2倍 地区。

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。

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。

公开(公告)号：US06400877B1

公开(公告)日：2002-06-04

申请号：US09879103

申请日：2001-06-13

申请人： Takatoshi Kato ,  Masaaki Hirano

发明人： Takatoshi Kato ,  Masaaki Hirano

IPC分类号： G02B602

CPC分类号： G02B6/02261 ,  G02B6/02004 ,  G02B6/0228 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/29377

摘要： The present invention concerns a negative-dispersion optical fiber for compensating in a shorter length for chromatic dispersion of a positive-dispersion optical fiber in a signal wavelength band, and an optical transmission line incorporating it. The negative-dispersion optical fiber has the following properties at the wavelength of 1550 nm; chromatic dispersion D of not more than −150 ps/nm/km; a dispersion slope satisfying such a condition that a ratio thereof (S/D) to the chromatic dispersion D is not less than 2.0×10−3/nm nor more than 4.7×1031 3/nm; and an effective area of not less than 12 &mgr;m2 but less than 25 &mgr;m2. For satisfying these properties, the negative-dispersion optical fiber has, in the order stated from the center toward the outer periphery, a core region of a maximum refractive index n1, a first cladding of a refractive index n2 ( n2), and a third cladding of a refractive index n4 (

摘要翻译： 本发明涉及用于在信号波长带中的正色散光纤的色散在较短长度上进行补偿的负色散光纤以及包括其的光传输线。 负色散光纤在1550nm的波长下具有以下性质： 色散D不大于-150ps / nm / km; 满足（S / D）与色散D的比例为2.0×10 -3 / nm以上4.7×10 31 3 / nm以下的条件的色散斜率; 有效面积不低于12mum2但小于25mum2。 为了满足这些特性，负色散光纤以从中心向外周的顺序具有最大折射率n1的芯区域，折射率n2（ n2）的包层和折射率n4（

公开(公告)号：US06862391B2

公开(公告)日：2005-03-01

申请号：US10108257

申请日：2002-03-28

申请人： Masaaki Hirano ,  Akira Tada ,  Takatoshi Kato

发明人： Masaaki Hirano ,  Akira Tada ,  Takatoshi Kato

IPC分类号： G02B6/34 ,  H04B10/2525 ,  G02B6/02 ,  H04J14/02

CPC分类号： G02B6/02233 ,  G02B6/02261 ,  G02B6/02271 ,  G02B6/02285 ,  G02B6/03666 ,  G02B6/03688 ,  G02B6/29377 ,  H04B10/2525 ,  H04B2210/258

摘要： The present invention relates to an optical transmission line and the like having a chromatic dispersion with a small absolute value as a whole within a signal wavelength band including S, C, and L bands. This optical transmission line comprises a single-mode optical fiber and a dispersion-compensating optical fiber which are connected to each other; and has, as characteristics of the whole optical transmission line at a wavelength of 1550 nm, a chromatic dispersion with an absolute value of 4 ps/nm/km or less, and a dispersion slope of −0.015 ps/nm2/km or more but less than 0 ps/nm2/km. Its chromatic dispersion has a maximum value within a wavelength range of 1450 to 1530 nm, and a minimum value within a wavelength range of 1570 to 1620 nm.

摘要翻译： 本发明涉及在包括S，C和L波段的信号波长带内具有整体上绝对值小的色散的光传输线路等。 该光传输线包括彼此连接的单模光纤和色散补偿光纤; 并且作为整个光传输线的波长1550nm的特性，具有绝对值为4ps / nm / km以下的色散和-0.015ps / nm 2 / km的色散斜率 或更多但小于0ps / nm 2 / km。 其色散在1450〜1530nm的波长范围内具有最大值，在1570〜1620nm的波长范围内具有最小值。

公开(公告)号：US06782172B2

公开(公告)日：2004-08-24

申请号：US09884945

申请日：2001-06-21

申请人： Masaaki Hirano ,  Takatoshi Kato

发明人： Masaaki Hirano ,  Takatoshi Kato

IPC分类号： G02B602

CPC分类号： G02B6/02242 ,  G02B6/02261 ,  G02B6/02271 ,  G02B6/03644 ,  G02B6/03666 ,  G02B6/03688 ,  G02B6/03694 ,  G02B6/29377 ,  H04B10/2525

摘要： Proposed are a dispersion compensating fiber and an optical transmission system that can, using a short length of the fiber, compensate the chromatic dispersion and the dispersion slope of a non-zero dispersion shifted fiber whose chromatic dispersion is +2 ps·nm−1·km−1 to +10 ps·nm−1·km−1 and whose dispersion slope is +0.04 ps·nm−2·km−1 to +0.12 ps·nm−2·km−1 at 1550 nm. In the optical transmission system 1, an optical transmission line 30 that consists of a dispersion-shifted fiber 31 and a dispersion compensation fiber 32 is installed between stations 10 and 20. The dispersion compensating fiber 32 has the chromatic dispersion of −250 ps·nm−1·km−1˜−40 ps·nm−1·km−1 and the dispersion slope of 0.015 ps·nm−2·km−1˜0.030 ps·nm−2·km−1 at 1550 nm.

摘要翻译： 提出了一种色散补偿光纤和光传输系统，其可以使用短长度的光纤补偿色散为+2ps.nm <-1的非零色散位移光纤的色散和色散斜率 > .km <-1>至+10 ps.nm -1 .km <-1，其色散斜率为+0.04 ps.nm <-2> km <-1>至+0.12 ps.nm < -2> .km <-1>。 在光传输系统1中，将由色散位移光纤31和色散补偿光纤32组成的光传输线30安装在台10和20之间。色散补偿光纤32具有-250ps.nm的色散 <-1> .km <-1>〜-40 ps.nm <-1> .km <-1，色散斜率为0.015 ps.nm <-2>。km <-1>〜0.030 ps.nm <-2> .km <-1>在1550nm。

公开(公告)号：US06658190B2

公开(公告)日：2003-12-02

申请号：US09734548

申请日：2000-12-13

申请人： Masaaki Hirano ,  Takatoshi Kato

发明人： Masaaki Hirano ,  Takatoshi Kato

IPC分类号： G02B602

CPC分类号： G02B6/03627 ,  G02B6/02019 ,  G02B6/02257 ,  G02B6/0228 ,  G02B6/0281 ,  G02B6/03611 ,  H04B10/25253

摘要： The present invention relates to an optical fiber having a structure suitable for long-distance optical communications, and an optical transmission line including the same. The optical fiber in accordance with the present invention comprises a core region extending along a predetermined axis, and a cladding region disposed so as to surround the outer periphery of the core region; and, as characteristics at a wavelength of 1.55 &mgr;m, an effective area of at least 110 &mgr;m2, a dispersion of 18 to 23 ps/nm/km, and a dispersion slope of 0.058 to 0.066 ps/nm2/km.

摘要翻译： 本发明涉及一种具有适合长距离光通信的结构的光纤，以及包括该光纤的光传输线。 根据本发明的光纤包括沿着预定轴线延伸的芯区域和围绕芯区域的外周设置的包层区域; 并且作为波长为1.55μm的特征，有效面积为至少110μm2，色散为18至23ps / nm / km，色散斜率为0.058至0.066ps / nm 2 / 公里。

公开(公告)号：US06522821B1

公开(公告)日：2003-02-18

申请号：US09584087

申请日：2000-05-31

申请人： Masaaki Hirano ,  Motonori Nakamura ,  Takatoshi Kato

发明人： Masaaki Hirano ,  Motonori Nakamura ,  Takatoshi Kato

IPC分类号： G02B602

CPC分类号： G02B6/03644 ,  G02B6/02009 ,  G02B6/02261 ,  G02B6/03611 ,  G02B6/03627

摘要： The present invention relates to a dispersion-compensating optical fiber which can transmit, with a low loss, light signals having a high power; and an optical transmission system including the same. This dispersion-compensating optical fiber is insured its single mode at a wavelength of 1.55 &mgr;m, and comprises, about the optical axis, at least a first core having a refractive index n1, a second core having a refractive index n2 (>n1), and a cladding having a refractive index n3 (

摘要翻译： 本发明涉及一种能够以低损耗传输具有高功率的光信号的色散补偿光纤; 以及包括该光传输系统的光传输系统。 该色散补偿光纤在1.55μm的波长下保证其单模，并且包括围绕光轴的至少第一纤芯具有折射率n1，第二纤芯具有折射率n2（> n1）， 和具有折射率n3（

公开(公告)号：US07233216B2

公开(公告)日：2007-06-19

申请号：US10534460

申请日：2004-06-30

申请人： Takatoshi Kato ,  Atsushi Saitoh

发明人： Takatoshi Kato ,  Atsushi Saitoh

IPC分类号： H01P5/107

CPC分类号： H01P5/107 ,  Y10T29/49163 ,  Y10T29/49165 ,  Y10T29/49798

摘要： The present invention provides a line transition and a method for manufacturing the same. The line transition is constructed such that a planar circuit can be arranged in the direction parallel to the propagation direction of electromagnetic waves propagating through a solid waveguide, the coupling characteristics of the solid waveguide with the planar circuit formed on a dielectric substrate are not influenced by the assembly precision of the waveguide and the circuit, and the line transition characteristics are not affected by a variation in manufacturing the dielectric substrate. Notches are formed at the edges of the dielectric substrate in the vicinities of coupled-line pattern segments formed on a dielectric substrate. The notches are formed by punching through holes in a ceramic green sheet serving as a motherboard, firing the motherboard, and cutting the motherboard using dicing lines passing through the through holes.

摘要翻译： 本发明提供线路转换及其制造方法。 线路转换被构造成使得平面电路可以在平行于通过固体波导传播的电磁波的传播方向的方向上布置，固体波导与形成在电介质基板上的平面电路的耦合特性不受 波导和电路的组装精度以及线路转换特性不受制造电介质基片的变化的影响。 在电介质基板上形成的耦合线图案段附近，在电介质基板的边缘处形成凹口。 通过冲孔穿过用作母板的陶瓷生片中的孔，烧制母板，并使用穿过通孔的切割线切割主板，形成切口。