公开(公告)号：US06963695B2

公开(公告)日：2005-11-08

申请号：US09726380

申请日：2000-12-01

申请人： Toshiaki Okuno

发明人： Toshiaki Okuno

IPC分类号： H04B10/29 ,  H04B10/2507 ,  H04B10/2525 ,  H04B10/27 ,  H04B10/291 ,  H04J14/00 ,  H04J14/02 ,  H04B10/12

CPC分类号： H04J14/0227 ,  H04B10/2513 ,  H04J14/0201 ,  H04J14/0246 ,  H04J14/028

摘要： The present invention relates to an optical communication system including a structure for suppressing deterioration of transmission characteristics of signals added at each of nodes arranged in an optical transmission line, and a method of assigning signal channels. The optical communication system includes the optical transmission line for transmitting signals of plural channels between a transmitter and a receiver, and one or more nodes are arranged at predetermined positions of the optical transmission line. Each of the nodes includes an ADM for adding signals of a predetermined channel to the optical transmission line, and a signal channel at which the absolute value of accumulated-dispersion up to the receiver becomes smallest among signal channels which can be added is assigned to each of the nodes in advance or dynamically.

摘要翻译： 本发明涉及一种光通信系统，以及一种分配信号信道的方法，该光通信系统包括用于抑制在布置在光传输线路中的每个节点处添加的信号的传输特性的劣化的结构。 光通信系统包括用于在发射机和接收机之间发送多个信道的信号的光传输线路，并且一个或多个节点被布置在光传输线路的预定位置处。 每个节点包括用于将预定信道的信号添加到光传输线的ADM以及信号信道，在该信道中，可以添加的信号信道中的每个信道被分配给接收机的累积色散的绝对值最小 的节点。

公开(公告)号：US06907172B2

公开(公告)日：2005-06-14

申请号：US10228267

申请日：2002-08-27

申请人： Toshiaki Okuno ,  Masayuki Nishimura

发明人： Toshiaki Okuno ,  Masayuki Nishimura

IPC分类号： G02B6/036 ,  G02B6/02 ,  G02B6/34 ,  G02F1/35 ,  H04B10/2507 ,  H04B10/2525 ,  H04B10/2563 ,  H04B10/2569 ,  H04B10/294 ,  H04B10/297 ,  G02B6/20

CPC分类号： G02B6/02019 ,  G02B6/02247 ,  G02B6/03611 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/29377 ,  H04B10/25253 ,  H04B10/2916 ,  H04B2210/003

摘要： An optical communication system has a configuration in which an optical transmission line is laid between a repeater (transmitter) and another repeater (receiver). The optical transmission line is formed by fusion-splicing a first optical fiber on the upstream side and a second optical fiber on the downstream side. The first optical fiber has a transmission loss of 0.25 dB or less, and an effective area of 80 μm2 or above (preferably 100 μm2 or above), at a wavelength of 1550 nm, which is the wavelength of signal light. The second optical fiber is connected to the downstream end of the first optical fiber and has positive dispersion regions and negative dispersion regions which are alternately arranged along the longitudinal direction and whose chromatic dispersions at a wavelength of 1550 nm are positive and negative, respectively.

摘要翻译： 光通信系统具有在中继器（发射机）与另一个中继器（接收机）之间铺设光传输线路的结构。 光传输线通过在上游侧熔接第一光纤和在下游侧熔接第二光纤而形成。 第一光纤的波长为传输损耗为0.25dB以下，有效面积为80μm以上（优选为100μm以上），优选为100nm以上。 为1550nm，这是信号光的波长。 第二光纤连接到第一光纤的下游端，并且具有正的色散区域和负色散区域，它们沿纵向方向交替布置，并且其在1550nm的波长上的色散分别为正和负。

公开(公告)号：US06501892B1

公开(公告)日：2002-12-31

申请号：US09580971

申请日：2000-05-30

申请人： Toshiaki Okuno ,  Shinji Ishikawa ,  Tomonori Kashiwada

发明人： Toshiaki Okuno ,  Shinji Ishikawa ,  Tomonori Kashiwada

IPC分类号： G02B602

CPC分类号： G02B6/02242 ,  G02B6/02261 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/29377 ,  H04B10/2525

摘要： The dispersion-compensating fiber according to the present invention is an optical fiber having a structure which, when constituting an optical transmission line together with a dispersion-shifted fiber, whose zero-dispersion wavelength is in a 1.5-&mgr;m wavelength band, for guiding light signals in the 1.5-&mgr;m wavelength band or 1.6-&mgr;m wavelength band, is capable of improving transmission characteristics of the whole optical transmission line and allowing the dispersion to be compensated for efficiently and the size thereof to become smaller; and has a structure for improving the total dispersion slope of the optical transmission line while in a state fully compensating for the dispersion of the dispersion-shifted fiber. This dispersion-compensating fiber has a triple cladding structure having a first cladding, a second cladding, and a third cladding which are successively provided on the outer periphery of a core; and, in a state where the relative refractive index differences in the regions and outside diameters thereof are optimized so as to compensate for the dispersion-shifted fiber, realizes an optical transmission system having a favorable total dispersion slope.

摘要翻译： 根据本发明的色散补偿光纤是具有这样的结构的光纤，该光纤在与零色散波长为1.5μm波段的色散位移光纤一起构成光传输线时，用于引导光 在1.5μm波长带或1.6μm波长带的信号能够改善整个光传输线的传输特性，并且可以有效地补偿色散并使其尺寸变小; 并且具有在完全补偿色散位移光纤的色散的状态下改善光传输线的总色散斜率的结构。 该色散补偿光纤具有三层包层结构，其具有连续设置在芯的外周上的第一包层，第二包层和第三包层; 并且在其区域和外径的相对折射率差被优化以补偿色散位移光纤的状态下，实现具有良好的总色散斜率的光传输系统。

公开(公告)号：US06480312B1

公开(公告)日：2002-11-12

申请号：US09212269

申请日：1998-12-16

申请人： Toshiaki Okuno ,  Masashi Onishi ,  Masayuki Nishimura

发明人： Toshiaki Okuno ,  Masashi Onishi ,  Masayuki Nishimura

IPC分类号： H04B1012

CPC分类号： H04B10/2972 ,  H04B10/2525 ,  H04B2210/256

摘要： The present invention provides a dispersion compensating system for bi-directional optical communication using wavelength division multiplexing transmission. Signal lights bi-directionally pass through a signal optical fiber which comprises a dispersion compensating fiber working bi-directionally.

摘要翻译： 本发明提供一种使用波分复用传输的双向光通信的色散补偿系统。 信号灯双向通过信号光纤，其包括双向工作的色散补偿光纤。

公开(公告)号：US20130285778A1

公开(公告)日：2013-10-31

申请号：US13816344

申请日：2012-03-15

申请人： Keisuke Taihaku ,  Katsuya Kume ,  Toshiaki Okuno ,  Izumi Ozeki ,  Tomohiro Omure ,  Takashi Ozaki

发明人： Keisuke Taihaku ,  Katsuya Kume ,  Toshiaki Okuno ,  Izumi Ozeki ,  Tomohiro Omure ,  Takashi Ozaki

IPC分类号： H01F1/42 ,  H01F41/02

CPC分类号： H01F1/0536 ,  B22F1/0062 ,  B22F1/02 ,  B22F3/02 ,  B22F3/1021 ,  B22F3/16 ,  B22F5/006 ,  B22F2001/0066 ,  B22F2003/248 ,  B22F2201/01 ,  B22F2301/45 ,  B22F2302/45 ,  B22F2998/10 ,  B22F2999/00 ,  C22C38/002 ,  C22C38/005 ,  C22C2202/02 ,  H01F1/06 ,  H01F1/42 ,  H01F41/0266 ,  B22F9/04 ,  B22F3/10

摘要： There are provided a rare-earth permanent magnet and a manufacturing method thereof capable of preventing deterioration of magnet properties. In the method, magnet material is milled into magnet powder. Next, a mixture is prepared by mixing the magnet powder and a binder made of long-chain hydrocarbon and/or of a polymer or a copolymer consisting of monomers having no oxygen atoms. Next, the mixture is formed into a sheet-like shape so as to obtain a green sheet. After that, the green sheet is held for a predetermined length of time at binder decomposition temperature in a non-oxidizing atmosphere so as to remove the binder by causing depolymerization reaction or the like to the binder, which turns into monomer. The green sheet from which the binder has been removed is sintered by raising temperature up to sintering temperature. Thereby a permanent magnet 1 is obtained.

摘要翻译： 提供了能够防止磁体特性劣化的稀土永磁体及其制造方法。 在该方法中，将磁体材料研磨成磁铁粉末。 接下来，通过混合磁粉和由长链烃和/或聚合物或由不含氧原子的单体组成的共聚物制成的粘合剂来制备混合物。 接着，将混合物形成为片状，得到生片。 之后，将生片在非氧化性气氛中在粘合剂分解温度下保持规定的时间，以便通过使粘合剂进行解聚反应等而变成单体来除去粘合剂。 通过将温度升高至烧结温度来烧结已经除去粘合剂的生片。 由此得到永磁体1。

公开(公告)号：US08385743B2

公开(公告)日：2013-02-26

申请号：US09781564

申请日：2001-02-13

申请人： Toshiaki Okuno ,  Masayuki Nishimura

发明人： Toshiaki Okuno ,  Masayuki Nishimura

IPC分类号： H04J14/02

CPC分类号： H04B10/296 ,  H04J14/0221

摘要： Signal wavelengths λ1, λ2, λ3 of signal light components multiplexed at signal multiplexing sections 31, 41, 51 of multiplexing stations 3, 4, 5 installed on the input end side of an EDFA 2 on an optical transmission line 1 are set such that the wavelength-dependent noise figure of EDFA 2 successively decreases from the signal wavelength λ1 multiplexed at the signal multiplexing section 31 closest to the input end of EDFA 2 to λ2 and λ3. On the other hand, the transmission length of individual signal light component before being fed into the EDFA 2 is the shortest in the signal light component at λ1 and successively increases at λ2 and λ3. Thus, the order of magnitude of input signal light power is the same as the order of highness of noise figure in EDFA 2, whereby fluctuations in S/N ratio in the resulting amplified light are reduced.

摘要翻译： 信号光分量的信号波长λ1，λ2，λ3被复用在安装在光传输线路1上的EDFA2的输入端侧的复用站3,4,5的信号多路复用部分31,41,51处， EDFA2的与波长相关的噪声系数从最靠近EDFA2的信号复用部分31多路复用的信号波长λ1连续减小到λ2和λ3。 另一方面，馈送到EDFA2中的各个信号光分量的发送长度在λ1的信号光分量中最短，并且在λ2和λ3处依次增加。 因此，输入信号光功率的数量级与EDFA2中的噪声系数高的顺序相同，从而降低了所得放大的光的S / N比的波动。

公开(公告)号：US20110122644A1

公开(公告)日：2011-05-26

申请号：US12007835

申请日：2008-01-16

申请人： Toshiaki Okuno

发明人： Toshiaki Okuno

IPC分类号： H01S3/00 ,  G02B6/00

CPC分类号： H01S3/0057 ,  G02B6/02028 ,  G02B6/02285 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03666 ,  G02B6/29377 ,  H01S3/06725

摘要： The present invention relates to a light source apparatus having a structure for stably supplying broadband pulsed light having a wavelength spectrum with an excellent flatness over a wide band. The light source apparatus employs, as a seed light source, a short-pulsed light source having such an excellent output pulse characteristic that the frequency bandwidth extending until the output pulse drops by 10 dB or 20 dB from a peak is 5 THz or more. The light source apparatus also includes a broadband light producing fiber having an optical characteristic suitable for combining with the short-pulsed light source. The broadband light producing fiber inputs pulsed light from the pulsed light source, and produces the broadband pulsed light by utilizing a nonlinear optical phenomenon. This structure yields broadband pulsed light having such a wavelength spectrum that a region whose power fluctuation is suppressed to 6 dB or less extends over 100 nm or more.

摘要翻译： 本发明涉及一种光源装置，其具有稳定地提供宽带脉冲光的结构，该宽带脉冲光具有在宽带上具有优异的平坦度的波长谱。 光源装置使用具有如此优异的输出脉冲特性的短脉冲光源，使得直到输出脉冲从峰值下降10dB或20dB的频带宽度为5THz以上。 光源装置还包括具有适于与短脉冲光源组合的光学特性的宽带光产生光纤。 宽带光纤产生光纤从脉冲光源输入脉冲光，并利用非线性光学现象产生宽带脉冲光。 这种结构产生具有这样的波长频谱的宽带脉冲光，使得功率波动抑制在6dB以下的区域延伸超过100nm以上。

公开(公告)号：US20100134868A1

公开(公告)日：2010-06-03

申请号：US12530753

申请日：2008-03-13

申请人： Toshiaki Okuno

发明人： Toshiaki Okuno

IPC分类号： G02F1/365 ,  G02F1/23 ,  G02B26/00

CPC分类号： G02F1/353 ,  G02F1/3536 ,  G02F1/365 ,  G02F2201/02

摘要： Provided is a wavelength converter having a simple and low-cost structure. The wavelength converter generates converted light having a wavelength different from that of input light. The wavelength converter includes (1) a pump light source that outputs pump light, (2) an optical multiplexer that combines and outputs input light and the pump light, (3) a first optical fiber that receives and guides the input light and the pump light that have been combined and output by the optical multiplexer and generates converted light using a nonlinear optical phenomenon that occurs while the first optical fiber guides the input light and the pump light, the first optical fiber being coiled, and (4) zero-dispersion wavelength adjusting means that adjusts a zero-dispersion wavelength of the first optical fiber.

摘要翻译： 提供了具有简单且低成本结构的波长转换器。 波长转换器产生具有与输入光不同的波长的转换光。 波长转换器包括（1）输出泵浦光的泵浦光源，（2）组合并输出输入光和泵浦光的光复用器，（3）接收并引导输入光和泵的第一光纤 由光复用器组合并输出的光，并且使用在第一光纤引导输入光和泵浦光时发生的非线性光学现象产生转换光，第一光纤被卷绕，以及（4）零色散 波长调节装置，其调节第一光纤的零色散波长。

公开(公告)号：US07551822B2

公开(公告)日：2009-06-23

申请号：US12036576

申请日：2008-02-25

申请人： Toshiaki Okuno

发明人： Toshiaki Okuno

IPC分类号： G02B6/02 ,  G02B6/32 ,  G02B6/255

CPC分类号： G02F1/353 ,  G02F1/365 ,  G02F2001/3528

摘要： A nonlinear optical signal-treating apparatus can suppress the distortion of pulse light to be inputted into an optical fiber to an allowable level or less. The apparatus comprises a pulse light source for outputting first pulse light, a first optical fiber, a second optical fiber that is spliced with the first optical fiber and has a mode-field diameter smaller than that of the first optical fiber, and a light-introducing system for inputting the first pulse light into the first optical fiber. The second optical fiber receives the first pulse light and generates second pulse light having a newly produced wavelength. The peak power ratio of the first pulse light outputted from the first optical fiber to that inputted into the first optical fiber and the pulse width ratio of the first pulse light outputted from the first optical fiber to that inputted into the first optical fiber are 0.5 to 1.5.

摘要翻译： 非线性光信号处理装置可以将输入到光纤的脉冲光的失真抑制到允许值以下。 该装置包括用于输出第一脉冲光的脉冲光源，第一光纤，与第一光纤接合的模场直径小于第一光纤的模场直径的第二光纤， 用于将第一脉冲光输入到第一光纤中的引入系统。 第二光纤接收第一脉冲光并产生具有新产生的波长的第二脉冲光。 从第一光纤输出的第一脉冲光与输入到第一光纤的第一脉冲光的峰值功率比和从第一光纤输出的第一脉冲光的脉冲宽度比与输入到第一光纤的第一脉冲光的峰值功率比分别为0.5〜 1.5。

公开(公告)号：US20090022189A1

公开(公告)日：2009-01-22

申请号：US11883364

申请日：2007-01-17

申请人： Toshiaki Okuno

发明人： Toshiaki Okuno

IPC分类号： H01S3/10

CPC分类号： G02F1/3513 ,  G02F2001/3503 ,  G02F2001/3528

摘要： The present invention relates to a light source apparatus that has a base structure capable of generating SC light and further having a structure that enables the shaping of the spectral waveform of the SC light, power adjustment of the SC light, or adjustment of the frequency of repetition of the pulse train that contains the SC light. For example, a light source apparatus that enables shaping of spectral waveforms comprises a seed light source that emits seed light which is a pulse train or continuous light; an optical fiber that generates SC light from the seed light, and spectrum shaping means for completely or partially changing the spectral waveform of the SC light. The shaping of the spectral waveform changes the maximum power of the seed light by changing the optical coupling efficiency of the seed light source and optical fiber, for example, thereby suitably deforms the spectrum of the light.

摘要翻译： 本发明涉及一种光源装置，其具有能够产生SC光的基底结构，并且还具有能够对SC光的光谱波形进行整形，SC光的功率调整或调整频率的结构 重复包含SC灯的脉冲串。 例如，能够形成光谱波形的光源装置包括发射作为脉冲串或连续光的种子光的种子光源; 从种子光产生SC光的光纤以及用于完全或部分地改变SC光的光谱波形的光谱整形装置。 光谱波形的变形例如通过改变种子光源和光纤的光耦合效率来改变种子光的最大功率，从而适当地使光谱变形。