公开(公告)号：US20050063043A1

公开(公告)日：2005-03-24

申请号：US10715141

申请日：2003-11-18

申请人： Hiroshi Nakamoto ,  Takao Naito ,  Kenichi Torii ,  Toshiki Tanaka

发明人： Hiroshi Nakamoto ,  Takao Naito ,  Kenichi Torii ,  Toshiki Tanaka

IPC分类号： G02F1/35 ,  H01S3/30 ,  H01S3/00

CPC分类号： H04B10/2916 ,  H01S3/094076 ,  H01S3/094096 ,  H01S3/1022 ,  H01S3/302 ,  H04B2210/003

摘要： A plurality of pump light sources generate plural variations of pump light having different frequencies. A modulation circuit intensity-modulates the plural variations of pump light in the predetermined periods, respectively. A pump light pair whose frequency difference equals a Raman shift frequency are modulated such that they cannot simultaneously enters an emission state. A wavelength-multiplexer wavelength-multiplexes the plural variations of pump light modulated by the modulation circuit. A optical guide device guides the plural variations of pump light wavelength-multiplexed by the wavelength-multiplexer to an optical fiber.

摘要翻译： 多个泵浦光源产生具有不同频率的泵浦光的多个变化。 调制电路分别在预定时段内对泵浦光的多个变化进行强度调制。 频率差等于拉曼位移频率的泵浦灯对被调制成不能同时进入发射状态。 波长多路复用器对由调制电路调制的泵浦光的多个变化进行波长多路复用。 光导装置将由波长多路复用器波长多路复用的泵浦光的多种变化引导到光纤。

公开(公告)号：US07379233B2

公开(公告)日：2008-05-27

申请号：US10715141

申请日：2003-11-18

申请人： Hiroshi Nakamoto ,  Takao Naito ,  Kenichi Torii ,  Toshiki Tanaka

发明人： Hiroshi Nakamoto ,  Takao Naito ,  Kenichi Torii ,  Toshiki Tanaka

IPC分类号： H04B10/17

CPC分类号： H04B10/2916 ,  H01S3/094076 ,  H01S3/094096 ,  H01S3/1022 ,  H01S3/302 ,  H04B2210/003

摘要： A plurality of pump light sources generate plural variations of pump light having different frequencies. A modulation circuit intensity-modulates the plural variations of pump light in the predetermined periods, respectively. A pump light pair whose frequency difference equals a Raman shift frequency are modulated such that they cannot simultaneously enters an emission state. A wavelength-multiplexer wavelength-multiplexes the plural variations of pump light modulated by the modulation circuit. A optical guide device guides the plural variations of pump light wavelength-multiplexed by the wavelength-multiplexer to an optical fiber.

摘要翻译： 多个泵浦光源产生具有不同频率的泵浦光的多个变化。 调制电路分别在预定时段内对泵浦光的多个变化进行强度调制。 频率差等于拉曼位移频率的泵浦灯对被调制成不能同时进入发射状态。 波长多路复用器对由调制电路调制的泵浦光的多个变化进行波长多路复用。 光导装置将由波长多路复用器波长多路复用的泵浦光的多种变化引导到光纤。

公开(公告)号：US07242519B2

公开(公告)日：2007-07-10

申请号：US10812104

申请日：2004-03-30

申请人： Kenichi Torii ,  Takao Naito ,  Toshiki Tanaka ,  Masahiro Yuki

发明人： Kenichi Torii ,  Takao Naito ,  Toshiki Tanaka ,  Masahiro Yuki

IPC分类号： H04B10/17

CPC分类号： H01S3/302 ,  H01S3/094096

摘要： It is an object of the present invention to provide a Raman amplifier capable of easily reducing the wavelength deviation of a Raman gain while suppressing system performance degradation, and an optical transmission system using such a Raman amplifier. To this end, the Raman amplifier of the present invention supplies, to an amplification medium, first pumping lights arranged at equal wavelength spacing in a signal light wavelength band, which is shifted to a shorter wavelength side in accordance with a Raman shift frequency, and second pumping lights arranged in a wavelength band on a shorter wavelength side and a longer wavelength side than a wavelength band of the first pumping lights, the wavelength and power of which are set so that peak wavelength spacing of the Raman gain in the signal light wavelength band is substantially equal to each other, to Raman amplifies a WDM signal light, and reduces the wavelength deviation of power of the WDM signal light by using a gain equalizer having the periodicity corresponding to the peak wavelength spacing of the Raman gain.

摘要翻译： 本发明的目的是提供一种能够在抑制系统性能劣化的同时，容易地降低拉曼增益的波长偏差的拉曼放大器，以及使用这样的拉曼放大器的光传输系统。 为此，本发明的拉曼放大器向放大媒体提供按照拉曼位移频率向短波长侧移动的信号光波长带中的等距波长间隔配置的第一泵浦光，以及 第二泵浦光布置在比第一泵浦光的波长带更短波长侧和较长波长侧的波长带中，其波长和功率被设置为使得信号光波长中的拉曼增益的峰值波长间隔 通过使用具有对应于拉曼增益的峰值波长间隔的周期的增益均衡器，拉曼放大WDM信号光，并降低WDM信号光的功率波长偏差。

公开(公告)号：US06671083B2

公开(公告)日：2003-12-30

申请号：US10101265

申请日：2002-03-20

申请人： Toshiki Tanaka ,  Kenichi Torii ,  Takao Naito

发明人： Toshiki Tanaka ,  Kenichi Torii ,  Takao Naito

IPC分类号： H01S300

CPC分类号： H04B10/2916 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094096 ,  H01S3/10023 ,  H01S3/302 ,  H04B10/071

摘要： The present invention aims at providing a Raman amplifier and an optical transmission system, capable of reducing characteristic deterioration to be caused by excitation lights mixedly existing within a wavelength band of signal lights. To this end, the Raman amplifier of the present invention comprises an excitation light source that generates excitation lights having a wavelength band overlapped with a wavelength band of the signal lights, a multiplexing unit that supplies the excitation lights to an optical transmission path, and an optical filter that suppresses optical components which are included in lights propagated through an optical transmission path and are of the same wavelengths as those of the excitation lights.

摘要翻译： 本发明的目的在于提供一种拉曼放大器和光传输系统，其能够降低由混合存在于信号光的波长带内的激发光引起的特性劣化。 为此，本发明的拉曼放大器包括产生具有与信号光的波长带重叠的波长带的激励光的激发光源，将激励光提供给光传输路径的复用部，以及 滤光器，其抑制包含在通过光传输路径传播并且具有与激发光的波长相同的波长的光的光学部件。

公开(公告)号：US06930823B2

公开(公告)日：2005-08-16

申请号：US10022543

申请日：2001-12-20

申请人： Hiroshi Nakamoto ,  Takao Naito ,  Naomasa Shimojoh ,  Toshiki Tanaka

发明人： Hiroshi Nakamoto ,  Takao Naito ,  Naomasa Shimojoh ,  Toshiki Tanaka

IPC分类号： G02F1/35 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/102 ,  H01S3/131 ,  H01S3/16 ,  H01S3/30 ,  H04B10/07 ,  H04B10/077 ,  H04B10/29 ,  H04B10/291 ,  H01S3/00 ,  H04B10/08

CPC分类号： H04B10/2916 ,  H01S3/06754 ,  H01S3/094096 ,  H01S3/1301 ,  H01S3/1608 ,  H01S3/302 ,  H04B10/0775 ,  H04B2210/074

摘要： The present invention has an object to provide an optical transmission technology using Raman amplification wherein a supervisory signal transferred among a plurality of optical transmission apparatuses is superimposed on a main signal light by using a pumping light for Raman amplification. To this end, a Raman amplifier applied with the optical transmission method of the present invention, is provided with a supervisory signal superimposing section for superimposing a supervisory signal transferred among the optical transmission apparatuses on at least one of a plurality of pumping lights of different wavelengths to be supplied to a Raman amplification medium via a multiplexer from a pumping light generating section, thereby transmitting the main signal light propagated through the Raman amplification medium to be Raman amplified, which is superimposed with the supervisory signal.

摘要翻译： 本发明的目的是提供一种使用拉曼放大的光传输技术，其中通过使用用于拉曼放大的泵浦光将多个光传输装置之间传输的监视信号叠加在主信号光上。 为此，应用本发明的光传输方法的拉曼放大器设置有监视信号叠加部分，用于将在光传输装置之间传送的监控信号叠加在不同波长的多个泵浦光中的至少一个上 通过来自泵浦光产生部分的多路复用器提供给拉曼放大介质，从而将通过拉曼放大介质传播的主信号光传输为与监控信号叠加的拉曼放大。

公开(公告)号：US07457546B2

公开(公告)日：2008-11-25

申请号：US10747314

申请日：2003-12-30

申请人： Toshiki Tanaka ,  Takao Naito

发明人： Toshiki Tanaka ,  Takao Naito

IPC分类号： H04B10/12

CPC分类号： H04B10/25253 ,  H04B10/2918

摘要： An optical transmission system that alleviates waveform distortions due to nonlinear effects in fibers. A transmitter sends WDM signals to a receiver over a dispersion-managed optical transmission line with in-line optical repeaters. The transmission line is divided into a plurality of dispersion compensation intervals each composed of a main segment and a compensation segment. Chromatic dispersion is managed such that the dispersion compensation intervals have a non-zero net dispersion at every boundary point between them, or such that the number of zero-dispersion boundary points is reduced. The main segment is a series of repeater sections with negative dispersion, while the compensation segment is a single repeater section with positive dispersion. Non-uniform distribution of net chromatic dispersions over the transmission length is achieved by combining repeater section with different average dispersions, dispersion compensation intervals with different numbers of repeater sections, or repeater sections with different span lengths.

摘要翻译： 一种减轻由于光纤非线性效应引起的波形失真的光传输系统。 发射机通过具有直列光中继器的色散管理光传输线路向接收机发送WDM信号。 传输线被分成多个色散补偿间隔，每个色散补偿间隔由主要段和补偿段组成。 管理色散，使得色散补偿间隔在它们之间的每个边界点处具有非零净色散，或者使得零色散边界点的数量减少。 主段是一系列具有负色散的中继器段，而补偿段是具有正色散的单个中继器段。 通过将中继器部分与不同的平均色散，具有不同数量的中继器部分的色散补偿间隔或具有不同跨度长度的中继部分组合来实现净色散在传输长度上的不均匀分布。

公开(公告)号：US20070070919A1

公开(公告)日：2007-03-29

申请号：US11352868

申请日：2006-02-13

申请人： Toshiki Tanaka ,  Hideyuki Miyata ,  Kouichirou Amemiya ,  Tsunehisa Doi ,  Takao Naito

发明人： Toshiki Tanaka ,  Hideyuki Miyata ,  Kouichirou Amemiya ,  Tsunehisa Doi ,  Takao Naito

IPC分类号： G06F15/177 ,  G06F15/173 ,  H04J1/16 ,  H04L12/28

CPC分类号： H04L43/00 ,  H04L41/0803 ,  H04L41/12 ,  H04L43/16 ,  H04L43/18

摘要： In a network, a controller controls a physical-interconnection selection switch and middle switches so as to dynamically change a network topology according to the state of the network. A traffic analyzer detects how the traffic in the network changes. If there is a change in traffic, the controller controls the physical-interconnection selection switch and the middle switches so as to change the network topology to one suitable for the changed traffic.

摘要翻译： 在网络中，控制器控制物理互连选择交换机和中间交换机，以便根据网络的状态动态地改变网络拓扑。 流量分析器检测网络中的流量如何变化。 如果流量发生变化，则控制器控制物理互连选择开关和中间交换机，以便将网络拓扑改变为适合于改变流量的网络拓扑。

公开(公告)号：US20060171712A1

公开(公告)日：2006-08-03

申请号：US11145918

申请日：2005-06-07

申请人： Toshiki Tanaka ,  Yasuhiko Aoki ,  Hideyuki Miyata ,  Takao Naito ,  Kouichiro Amemiya

发明人： Toshiki Tanaka ,  Yasuhiko Aoki ,  Hideyuki Miyata ,  Takao Naito ,  Kouichiro Amemiya

IPC分类号： H04J14/00

CPC分类号： H04Q11/0062 ,  H04Q2011/009

摘要： The present invention provides an information processing system, comprising a plurality of calculation nodes with an optical transmitter, which individually outputs a plurality of optical signals each having a different wavelength, and an optical receiver, which individually receives a plurality of optical signals each having a different wavelength, an optical transmission path connecting a plurality of the calculation nodes to each other, and optical pathway switching unit, lying in the optical transmission path, for transmitting the optical signal to the specific calculation node in accordance with a wavelength of the optical signal output from one of the calculation nodes.

摘要翻译： 本发明提供了一种信息处理系统，包括多个具有单独输出多个具有不同波长的光信号的光发射机的计算节点，以及光接收机，其分别接收多个光信号，每个光信号具有 不同的波长，连接多个计算节点的光传输路径和位于光传输路径中的光路径切换单元，用于根据光信号的波长将光信号发送到特定的计算节点 从其中一个计算节点输出。

公开(公告)号：US06681082B1

公开(公告)日：2004-01-20

申请号：US09494529

申请日：2000-01-31

申请人： Toshiki Tanaka ,  Takao Naito

发明人： Toshiki Tanaka ,  Takao Naito

IPC分类号： H04B1016

CPC分类号： H04J14/0221 ,  H04B10/25253 ,  H04B2210/256

摘要： The present invention has an object to provide a WDM optical transmission system for effectively compensating such as wavelength dispersions of respective wavelength bands, by a simple constitution making use of a hybrid transmission path in case of transmitting a broadband WDM signal light containing a plurality of wavelength bands. To this end, wavelength dispersion characteristics of a hybrid transmission path utilizing a 1.3 &mgr;m zero-dispersion SMF and an RDF in the present WDM optical transmission system, are set such that compensation ratios of wavelength dispersion and dispersion slope become approximately 100% for a reference wavelength band which is one of a plurality of wavelength bands; and dispersion compensation fibers capable of compensating wavelength dispersions caused within the hybrid transmission path are inserted into propagation paths, respectively, within an optical amplifier, for the wavelength bands except for the reference wavelength band. In this way, wavelength dispersion compensation for the plurality of wavelength bands can be assuredly performed with a simple constitution.

摘要翻译： 本发明的目的是提供一种WDM光传输系统，用于通过在发送包含多个波长的宽带WDM信号光的情况下使用混合传输路径的简单结构来有效地补偿各波长带的波长色散 乐队。 为此，使用在本WDM光传输系统中利用1.3μm零色散SMF和RDF的混合传输路径的波长色散特性被设置为使得波长色散和色散斜率的补偿比对于参考值大约为100％ 波长带，其是多个波长带中的一个; 并且对于除了参考波长带之外的波长带，能够补偿在混合传输路径内引起的波长色散的色散补偿光纤分别插入到光放大器内的传播路径中。 以这种方式，可以以简单的结构可靠地进行多个波段的波长色散补偿。

公开(公告)号：US07577361B2

公开(公告)日：2009-08-18

申请号：US10914192

申请日：2004-08-10

申请人： Toshiki Tanaka ,  Takao Naito

发明人： Toshiki Tanaka ,  Takao Naito

IPC分类号： H04J14/02

CPC分类号： H04J14/02 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/028 ,  H04J14/0282 ,  H04J14/0283 ,  H04J14/0284

摘要： In the optical network system, light input to any of the optical input ports of the optical coupler is converted into light at another wavelength via a variable-wavelength optical receiver and an optical sender, and is then reinput to the optical coupler. This arrangement makes it possible to realize a full-mesh optical network system with a simple construction at low costs.

摘要翻译： 在光网络系统中，通过可变波长光接收器和光发送器将输入到光耦合器的任何光输入端口的光转换成另一波长的光，然后再输入到光耦合器。 这种布置使得可以以低成本实现简单结构的全网格光网络系统。