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    Wavelength division multiplexing optical repeating transmission method and repeating apparatus
    65.
    发明授权
    Wavelength division multiplexing optical repeating transmission method and repeating apparatus 失效
    波分复用光中继传输方法和中继装置

    公开(公告)号：US07616893B2

    公开(公告)日：2009-11-10

    申请号：US10781783

    申请日：2004-02-20

    申请人： Hiroki Ooi ,  Takashi Iwabuchi ,  Takafumi Terahara ,  George Ishikawa

    发明人： Hiroki Ooi ,  Takashi Iwabuchi ,  Takafumi Terahara ,  George Ishikawa

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0201 ,  H04B10/2513

    摘要： A repeating apparatus disposed at an end point of each divisional repeating interval of a light transmission line performs a first dispersion compensation step, an optical add/drop multiplexing step and a second dispersion compensation step to perform repeating transmission. The ratio of an over compensation amount at the second dispersion compensation step to the sum of dispersion compensation amounts at the first and second dispersion compensation steps is set so as to gradually vary together with the transmission distance from the terminal apparatus for transmission at which the repeating apparatus is disposed on the light transmission line so that degradation of wavelengths to be received by the terminal apparatus for reception is suppressed while dispersion compensation is performed with a high degree of accuracy at each optical add/drop multiplexing point on the transmission line.

    摘要翻译： 设置在光传输线的每个分割重复间隔的终点处的中继装置执行第一色散补偿步骤，光分插复用步骤和第二色散补偿步骤，以执行重复发送。 在第二色散补偿步骤中的过度补偿量与第一和第二色散补偿步骤之间的色散补偿量之和的比率被设置为随着与重复发送的终端装置的传输距离一起逐渐变化 装置设置在光传输线上，从而抑制由终端装置接收的波长的劣化，同时在传输线上的每个光分插复用点处以高精度执行色散补偿。

    Optical transmission apparatus having OADM function
    66.
    发明申请
    Optical transmission apparatus having OADM function 有权
    具有OADM功能的光传输设备

    公开(公告)号：US20080056715A1

    公开(公告)日：2008-03-06

    申请号：US11651599

    申请日：2007-01-10

    申请人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi

    发明人： Yuichi Akiyama ,  Takafumi Terahara ,  Hiroki Ooi

    IPC分类号： H04J14/00

    CPC分类号： H04Q11/0005 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0216 ,  H04J14/0217 ,  H04J14/0219 ,  H04Q2011/0035 ,  H04Q2011/006

    摘要： An optical transmission apparatus has a first wavelength selective switch (WSS) for route switching, provided with respect to each route, to selectively output signal light from a first input route to second through Nth output routes and to selectively output signal lights from second through Nth input routes to a first output route, for every wavelength, a second WSS for add and drop, to selectively output a signal light from an add port to the first through Nth output routes via the first WSS for every wavelength, and to selectively output the signal lights from the first through Nth input routes to a drop port via the first WSS for every wavelength, and an optical coupler to multiplex each of the signal lights output from the first WSS to the output routes and each of the signal lights output from the second WSS to the output routes, for every route, and to send multiplexed signal light to a first WSS of an other route, and to branch and supply multiplexed signal light input from said other route to the first WSS and the second WSS. The signal lights input and output by the first WSS and the second WSS are transmitted bidirectionally within a single optical transmission line.

    摘要翻译： 光传输装置具有用于路由切换的第一波长选择开关（WSS），其针对每条路线，选择性地将来自第一输入路径的信号光输出到第二至第N输出路径，并选择性地从第二到第N输出信号光 输入到第一输出路线的路由，对于每个波长，第二个用于加和减的WSS，用于经由第一WSS为每个波长选择性地输出来自加法端口的信号光到第一至第N输出路由，并选择性地输出 从第一至第N输入的信号灯经由用于每个波长的第一WSS到达分接口，以及光耦合器，用于将从第一WSS输出的每个信号光复用到输出路径，并且每个信号光从 对于每个路由，将第二WSS发送到输出路由，并将多路复用的信号光发送到另一路由的第一WSS，并分支和提供从sa输入的复用信号光 id其他路由到第一个WSS和第二个WSS。 由第一WSS和第二WSS输入和输出的信号灯在单个光传输线内双向传输。

    Raman amplifier and optical communication system including the same
    67.
    发明授权
    Raman amplifier and optical communication system including the same 失效
    拉曼放大器和光通信系统包括相同

    公开(公告)号：US07307782B2

    公开(公告)日：2007-12-11

    申请号：US10208198

    申请日：2002-07-31

    申请人： Tetsufumi Tsuzaki ,  Motoki Kakui ,  Takafumi Terahara ,  Junichi Kumasako

    发明人： Tetsufumi Tsuzaki ,  Motoki Kakui ,  Takafumi Terahara ,  Junichi Kumasako

    IPC分类号： H01S3/00

    CPC分类号： H01S3/302 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/09408 ,  H01S3/094096

    摘要： The present invention relates to a Raman amplifier where flexibility in device design considering both of Raman amplification and dispersion compensation is high. In the Raman amplifier, the Raman amplification optical fiber included in the optical amplification section and the dispersion compensating optical fiber included in the dispersion compensation section are arranged while being optically connected to each other. Since the optical amplification section and the dispersion compensation section are provided as independent optical devices, one device can be designed without being restricted to the design conditions of the other device.

    摘要翻译： 拉曼放大器本发明涉及考虑拉曼放大和色散补偿的器件设计中的灵活性高的拉曼放大器。 在拉曼放大器中，包括在光放大部分中的拉曼放大光纤和包括在色散补偿部分中的色散补偿光纤被布置成彼此光学连接。 由于光放大部分和色散补偿部分被设置为独立的光学器件，所以可以设计一个器件而不限于另一个器件的设计条件。

    Method for gain equalization, and device and system for use in carrying out the method
    69.
    发明授权
    Method for gain equalization, and device and system for use in carrying out the method 失效
    增益均衡方法，以及用于执行该方法的装置和系统

    公开(公告)号：US06829083B2

    公开(公告)日：2004-12-07

    申请号：US10745969

    申请日：2003-12-29

    申请人： Takafumi Terahara

    发明人： Takafumi Terahara

    IPC分类号： H01S300

    CPC分类号： H04B10/2941 ,  H01S3/10023 ,  H04B10/2935 ,  H04B2210/258 ,  H04J14/0221

    摘要： The present invention relates to a method for gain equalization, for example. First, an optical transmission line including an optical amplifier having a gain changing nonlinearly with wavelength is provided (step (a)). Secondly, gain equalization of the optical transmission line is performed so as to obtain a gain changing substantially linearly with wavelength (step (b)). Finally, gain equalization of the optical transmission line is performed so as to obtain a gain remaining substantially unchanged with wavelength (step (c)). According to this method, gain equalization of the optical transmission line is performed so as to obtain a gain changing substantially linearly with wavelength. Accordingly, variations in equalization error due to changes in system condition can be easily suppressed.

    摘要翻译： 本发明涉及一种增益均衡的方法。 首先，提供包括具有波长非线性变化的光放大器的光传输线（步骤（a））。 其次，进行光传输线的增益均衡，以获得基本上与波长线性变化的增益（步骤（b）））。 最后，进行光传输线的增益均衡，以获得与波长保持大致不变的增益（步骤（c）））。 根据该方法，进行光传输线路的增益均衡，以获得基本上以波长线性变化的增益。 因此，可以容易地抑制由于系统状态的变化引起的均衡误差的变化。

    Optical transmission system and optical transmission method utilizing Raman amplification
    70.
    发明授权
    Optical transmission system and optical transmission method utilizing Raman amplification 有权
    光传输系统和利用拉曼放大的光传输方式

    公开(公告)号：US06741389B2

    公开(公告)日：2004-05-25

    申请号：US10093818

    申请日：2002-03-11

    申请人： Junichi Kumasako ,  Takafumi Terahara

    发明人： Junichi Kumasako ,  Takafumi Terahara

    IPC分类号： H01S300

    CPC分类号： H04B10/2916 ,  H04B2210/003 ,  H04B2210/258

    摘要： The present invention aims at providing an optical transmission system for improving transmission characteristics, taking account of the nonlinear optical effect to be caused not only in an optical fiber transmission path wherein the distributed Raman amplification is performed but also in an amplifying medium wherein the discrete Raman amplification is performed, within an optical transmission device. To this end, the optical transmission system of the present invention controls, in each repeating section, the supplying conditions of pumping lights at a distributed Raman amplifier and a discrete Raman amplifier, based on signal light powers at a signal light input point to the optical fiber transmission path and a signal light output point from the optical fiber transmission path, and signal light powers at a signal light input point to a DCF (amplifying medium) and a signal light output point from the DCF within an optical repeater, so that an amount of nonlinear optical effect caused in one repeating section is brought to a required value or less.

    摘要翻译： 本发明的目的在于提供一种用于提高传输特性的光传输系统，其考虑到不仅在其中执行分布式拉曼放大的光纤传输路径中引起的非线性光学效应，而且在其中分立拉曼 在光传输装置内进行放大。 为此，本发明的光传输系统在每个重复部分中控制在分布式拉曼放大器和离散拉曼放大器处的泵浦光的供给条件，基于在光信号光输入点处的信号光功率 光纤传输路径和来自光纤传输路径的信号光输出点，并且信号光在光中继器内的DCF（放大介质）的信号光输入点和来自DCF的信号光输出点供电，使得 在一个重复部分中引起的非线性光学效果的数量达到所需值或更小。