公开(公告)号：US5960146A

公开(公告)日：1999-09-28

申请号：US899571

申请日：1997-07-24

申请人： Toshiaki Okuno ,  Masashi Onishi ,  Masayuki Nishimura ,  Satoki Kawanishi ,  Hidehiko Takara ,  Kunihiko Mori

发明人： Toshiaki Okuno ,  Masashi Onishi ,  Masayuki Nishimura ,  Satoki Kawanishi ,  Hidehiko Takara ,  Kunihiko Mori

IPC分类号： G02F1/35 ,  G02F1/365 ,  G02B6/16

CPC分类号： G02B6/02247 ,  G02B6/0228 ,  G02F1/3511 ,  G02F1/365 ,  G02B6/02228

摘要： High peak pulse light is incident on an optical fiber having a dispersion decreasing region which serves as a main region for generating supercontinuum or idler light and in which the chromatic dispersion does not increase but at least partially decreases in the direction in which light travels. The fiber can be applied to broad band width idler light generation with both light transmission directions. Four wave mixing upon incidence of the light on the dispersion decreasing region of the optical fiber are efficiently obtained.

摘要翻译： 高峰脉冲光入射到具有作为用于产生超连续光或空载光的主要区域的色散减小区域的光纤上，并且其中色散不会增加但在光行进方向上至少部分地减小。 光纤可以应用于具有两个光传输方向的宽带宽的惰轮光产生。 有效地获得光入射到光纤的色散减少区域上的四波混合。

公开(公告)号：US06763194B2

公开(公告)日：2004-07-13

申请号：US09757580

申请日：2001-01-11

申请人： Toshiaki Okuno ,  Masayuki Nishimura

发明人： Toshiaki Okuno ,  Masayuki Nishimura

IPC分类号： H04J1402

CPC分类号： H04J14/0221 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/028

摘要： The present invention relates to an optical transmission system and a channel assigning method with structure to reduce dispersion of power levels among signals dropped at respective signal branchpoints on an optical transmission line out of signals of multiple channels amplified in an optical amplifier. The optical transmission system has an optical transmission line in which signals of multiple channels propagate, an optical amplifier provided on the transmission line, and a plurality of signal branchpoints disposed on the downstream transmission line in which the signals of the channels outputted from the optical amplifier propagate. Each of the signal branchpoints drops a signal of a channel with a lowest power level out of arriving signals in the channels. This reduces the dispersion of power levels among signals dropped at the respective branchpoints, as a whole of the optical transmission system.

摘要翻译： 本发明涉及一种光传输系统和信道分配方法，其结构是在光放大器中放大的多个信道的信号上，在光传输线上的各个信号分支点处降低的信号中降低功率电平的色散。 光传输系统具有传输多个信道的光传输线，设置在传输线上的光放大器以及设置在下行传输线上的多个信号分支点，其中从光放大器输出的信道的信号 传播。 每个信号分支点从信道中的到达信号中丢弃具有最低功率电平的信道的信号。 这降低了作为整个光传输系统在相应分支点处丢弃的信号之间功率电平的分散。

公开(公告)号：US06724525B2

公开(公告)日：2004-04-20

申请号：US09788659

申请日：2001-02-21

申请人： Toshiaki Okuno ,  Eisuke Sasaoka ,  Masayuki Nishimura ,  Shigeru Tanaka

发明人： Toshiaki Okuno ,  Eisuke Sasaoka ,  Masayuki Nishimura ,  Shigeru Tanaka

IPC分类号： H01S300

CPC分类号： H01S3/302 ,  H01S3/0014 ,  H01S3/06754 ,  H01S3/1301 ,  H01S3/1305

摘要： Disclosed are an optical transmission system and a Raman amplifying control unit that can stabilize the effective loss of a transmission line even if the optical transmission system has a relay station between a transmitting station and a receiving station. The optical transmission system and the Raman amplifying control unit have an introducing means for outputting inspection light and introducing it to the transmission line, a receiving means for receiving the back-scatter from the inspection light, and a control means for inspecting the transmission line and controlling an exciting light supplying means according to the received backscattering light. The introducing means, the receiving means, and the control means are provided together with the exciting light supplying means in a station at the transmitting side or receiving side of a relay section in the optical transmission system.

摘要翻译： 公开了一种光传输系统和拉曼放大控制单元，其即使光传输系统在发射站和接收站之间具有中继站，也可以稳定传输线的有效损耗。 光传输系统和拉曼放大控制单元具有用于输出检查光并将其引入传输线的引入装置，用于从检查光接收反向散射的接收装置和用于检查传输线的控制装置和 根据所接收的反向散射光控制激励光供给装置。 引导装置，接收装置和控制装置与光传输系统中的中继部的发送侧或接收侧的站中的激励光供给装置一起设置。

公开(公告)号：US06347174B1

公开(公告)日：2002-02-12

申请号：US09297173

申请日：1999-07-06

申请人： Masashi Onishi ,  Toshiaki Okuno ,  Shinji Ishikawa ,  Tomonori Kashiwada ,  Masayuki Nishimura

发明人： Masashi Onishi ,  Toshiaki Okuno ,  Shinji Ishikawa ,  Tomonori Kashiwada ,  Masayuki Nishimura

IPC分类号： H04N591

CPC分类号： G02B6/03644 ,  G02B6/02028 ,  G02B6/02242 ,  G02B6/02276 ,  G02B6/0228 ,  G02B6/03627 ,  G02B6/03655 ,  G02B6/105 ,  G02F1/383

摘要： The present invention relates to a nonlinear optical fiber which can generate a nonlinear optical phenomenon with high efficiency, an optical fiber coil wound with the nonlinear optical fiber, and a wavelength converter equipped with the nonlinear optical fiber. In particular, the nonlinear optical fiber according to the present invention has, as characteristics with respect to input light having a predetermined wavelength, a mode field diameter of 5 &mgr;m or less, a polarization mode dispersion of 1 ps/km½ or less or a fixed plane of polarization, a zero-dispersion wavelength of not less than 1.5 &mgr;m but not greater than 1.6 &mgr;m, a cutoff wavelength of not less than 1.4 &mgr;m but not greater than 1.7 &mgr;m at a length of 2 m, a transmission loss of 3 dB/km or less, and a nonlinear coefficient of 10/W/km or more. As a result of this configuration, the nonlinear optical fiber generates, with high efficiency, desirable converted light occurring upon the nonlinear phenomenon.

摘要翻译： 本发明涉及一种能够高效率地产生非线性光学现象的非线性光纤，与非线性光纤缠绕的光纤线圈以及配备非线性光纤的波长转换器。 特别地，根据本发明的非线性光纤作为具有预定波长的输入光的特性，模场直径为5um以下，偏振模色散为1ps / km 1/2以下或固定 偏振平面，零分散波长不小于1.5μm但不大于1.6μm，截止波长不小于1.4μm，但不大于1.7μm，长度为2μm，传输损耗为3dB / km以下，非线性系数为10 / W / km以上。 作为该结构的结果，非线性光纤以非线性现象产生期望的转换光，高效率地产生。

公开(公告)号：US07580183B2

公开(公告)日：2009-08-25

申请号：US10377104

申请日：2003-03-03

申请人： Motoki Kakui ,  Toshiaki Okuno ,  Masayuki Nishimura

发明人： Motoki Kakui ,  Toshiaki Okuno ,  Masayuki Nishimura

IPC分类号： G02B26/00 ,  H01S3/105 ,  H01S3/23 ,  H04B10/12

CPC分类号： H04B10/2942 ,  H04B10/2916

摘要： In an optical amplifier according to the present invention, a change signal from a change signal source is fed into a light source or a drive circuit. The wavelength of light outputted from the light source is changed based on the change signal. The wavelength-changed output light from the light source is outputted as pumping light from a pumping light generator to be supplied backwardly via an optical multiplexer/demultiplexer into an optical fiber. Signal light is Raman-amplified in the optical fiber with the supply of the pumping light.

摘要翻译： 在根据本发明的光放大器中，来自改变信号源的改变信号被馈送到光源或驱动电路中。 从光源输出的光的波长根据变化信号而改变。 来自光源的波长变化的输出光作为来自泵浦光发生器的泵浦光输出，经由光复用器/解复用器向后供给到光纤中。 信号光在提供泵浦光的情况下在光纤中进行拉曼放大。

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：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：US07085040B2

公开(公告)日：2006-08-01

申请号：US10834189

申请日：2004-04-29

申请人： Toshiaki Okuno ,  Masayuki Nishimura

发明人： Toshiaki Okuno ,  Masayuki Nishimura

IPC分类号： H04B10/13 ,  H04B10/17

CPC分类号： H01S3/22 ,  H01S3/06754 ,  H01S3/094011 ,  H01S3/107 ,  H01S3/30 ,  H01S3/302

摘要： The present invention relates to an optical transmission line enabling Raman amplification of an optical signal when pumping light is supplied thereto, a method of making this optical transmission line, and an optical transmission system using this optical transmission line. This optical transmission line is an optical transmission line enabling Raman amplification of an optical signal when pumping light is supplied thereto, wherein a region yielding the maximum value of Raman gain coefficient is separated from an end portion where the pumping light is supplied by a predetermined distance along a direction in which the pumping light advances. This optical transmission line can restrain the power of optical signal, at any point of the optical transmission line, from increasing to such an extent that optical Kerr effects occurs remarkably and from decreasing to such an extent that the SN ratio deteriorates greatly, and can fully secure the power of optical signal at the end point of the optical transmission line.

摘要翻译： 本发明涉及一种能够提供泵浦光时能够进行光信号的拉曼放大的光传输线路，制造该光传输线路的方法以及使用该光传输线路的光传输系统。 该光传输线是当向其提供泵浦光时能够对光信号进行拉曼放大的光传输线，其中产生拉曼增益系数的最大值的区域与泵送光被提供预定距离的端部分离 沿着泵浦光前进的方向。 该光传输线可以抑制在光传输线的任何点的光信号的功率增加到光学克尔效应显着地发生并且从降低到使SN比大大降低的程度的程度，并且可以完全 在光传输线路的终点处确保光信号的功率。

公开(公告)号：US06892003B2

公开(公告)日：2005-05-10

申请号：US10114321

申请日：2002-04-03

申请人： Makoto Katayama ,  Toshiaki Okuno ,  Masayuki Nishimura ,  Tomomi Sano ,  Masakazu Shigehara ,  Hiroshi Suganuma ,  Toru Iwashima ,  Tomohiko Kanie

发明人： Makoto Katayama ,  Toshiaki Okuno ,  Masayuki Nishimura ,  Tomomi Sano ,  Masakazu Shigehara ,  Hiroshi Suganuma ,  Toru Iwashima ,  Tomohiko Kanie

IPC分类号： H04B10/18 ,  G02B6/26 ,  G02B6/35 ,  H04J14/02

CPC分类号： H04B10/25133

摘要： An optical signal, which is to become the subject of dispersion compensation, is split by optical combining/splitting unit 2, and each frequency component of the optical signal that is split is reflected by the corresponding reflective mirror 30 included in reflective mirror group 3 to apply a predetermined phase shift to the respective frequency components Each reflected frequency component is then combined using optical combining/splitting unit 2, to give dispersion compensated optical signal Furthermore, in regards to reflective mirror group 3, which is used to apply phase shift to each frequency component of an optical signal, each of the respective plurality of reflective mirrors 30 is made a movable mirror having a movable reflection position that reflects the frequency components. Through this, dispersion that develops in an optical signal may be compensated with favorable controllability and high accuracy. Therefore, the precision and controllability of dispersion compensation will become superior, and realized is a variable dispersion compensator having a miniaturized optical circuit, and an optical transmission system comprising such variable dispersion compensator,

摘要翻译： 要成为色散补偿的对象的光信号被光学合成/分离单元2分离，并且被分离的光信号的每个频率分量被包括在反射镜组3中的相应的反射镜30反射到 对相应的频率分量施加预定的相移。然后使用光学合成/分离单元2组合每个反射频率分量，以产生色散补偿的光信号。此外，关于反射镜组3，其用于将相移施加到每个 光信号的频率分量，各个反射镜30中的每一个被制成具有反映频率分量的可移动反射位置的可移动反射镜。 由此，可以以良好的可控性和高精度补偿在光信号中产生的色散。 因此，色散补偿的精度和可控性将变得更好，并且实现了具有小型化光电路的可变色散补偿器和包括这种可变色散补偿器的光传输系统，

公开(公告)号：US06795235B1

公开(公告)日：2004-09-21

申请号：US09635900

申请日：2000-08-11

申请人： Toshiaki Okuno ,  Masayuki Nishimura

发明人： Toshiaki Okuno ,  Masayuki Nishimura

IPC分类号： H01S330

CPC分类号： H01S3/22 ,  H01S3/06754 ,  H01S3/094011 ,  H01S3/107 ,  H01S3/30 ,  H01S3/302

摘要： The present invention relates to an optical transmission line enabling Raman amplification of an optical signal when pumping light is supplied thereto, a method of making this optical transmission line, and an optical transmission system using this optical transmission line. This optical transmission line is an optical transmission line enabling Raman amplification of an optical signal when pumping light is supplied thereto, wherein a region yielding the maximum value of Raman gain coefficient is separated from an end portion where the pumping light is supplied by a predetermined distance along a direction in which the pumping light advances. This optical transmission line can restrain the power of optical signal, at any point of the optical transmission line, from increasing to such an extent that optical Kerr effects occurs remarkably and from decreasing to such an extent that the SN ratio deteriorates greatly, and can fully secure the power of optical signal at the end point of the optical transmission line.

摘要翻译： 本发明涉及一种能够提供泵浦光时能够进行光信号的拉曼放大的光传输线路，制造该光传输线路的方法以及使用该光传输线路的光传输系统。 该光传输线是当向其提供泵浦光时能够对光信号进行拉曼放大的光传输线，其中产生拉曼增益系数的最大值的区域与泵送光被提供预定距离的端部分离 沿着泵浦光前进的方向。 该光传输线可以抑制在光传输线的任何点的光信号的功率增加到光学克尔效应显着地发生并且从降低到使SN比大大降低的程度的程度，并且可以完全 在光传输线路的终点处确保光信号的功率。