公开(公告)号：US09929828B2

公开(公告)日：2018-03-27

申请号：US15016734

申请日：2016-02-05

申请人： FUJITSU LIMITED

发明人： Tomoyuki Kato ,  Shigeki Watanabe

IPC分类号： H04B10/08 ,  H04B17/00 ,  H04J14/02 ,  H04B10/079 ,  H04B10/077

CPC分类号： H04J14/0298 ,  H04B10/0775 ,  H04B10/07957 ,  H04B2210/078 ,  H04J14/0201

摘要： OADM processes input light containing reference light and multiplexed optical signals. A splitter splits the input light to generate first and second input light. A receiver generates an electric signal representing the second input light. An estimator estimates a difference in optical frequency between the reference light and a specified optical signal based on the electric signal. Alight source generates first and second light. An optical frequency of the second light is shifted by the estimated difference with respect to that of the first light. A demodulator generates a dropped signal representing the specified optical signal. A drive signal generator generates a drive signal in accordance with an inverted signal of the dropped signal. A modulator modulates the second light with the drive signal to generate a modulated optical signal. The first input light, the first light and the modulated optical signal are input to non-linear optical medium.

公开(公告)号：US09705593B2

公开(公告)日：2017-07-11

申请号：US14799418

申请日：2015-07-14

申请人： Huawei Marine Networks Co., Ltd.

发明人： Wendou Zhang ,  Changwu Xu

IPC分类号： H04B10/077 ,  H04B10/035 ,  H04B10/291 ,  H04B10/80

CPC分类号： H04B10/0777 ,  H04B10/035 ,  H04B10/0779 ,  H04B10/2916 ,  H04B10/2918 ,  H04B10/80 ,  H04B2210/078

摘要： A communications device is disclosed and includes: a first acquiring unit for acquiring first specific wavelength light and second specific wavelength light from a first optical path; a first receiving unit for converting the first specific wavelength light coming from the first acquiring unit into a first electrical signal; a first control unit for sending a first modulating signal to a first loopback unit according to the first electrical signal coming from the first receiving unit; and the first loopback unit for modulating the second specific wavelength light coming from the first acquiring unit according to the first modulating signal, and looping the modulated second specific wavelength light back to a second optical path, where a transmission direction of an optical signal in the second optical path is opposite to a transmission direction of an optical signal in the first optical path. The present invention further discloses a communications method.

公开(公告)号：US20160308607A1

公开(公告)日：2016-10-20

申请号：US15194462

申请日：2016-06-27

申请人： LEVEL 3 COMMUNICATIONS, LLC

发明人： Salvador E. Paredes ,  Timothy I. Copley

IPC分类号： H04B10/077 ,  H04Q11/00 ,  H04B10/25 ,  H04J14/02 ,  H04B10/27

CPC分类号： H04B10/0775 ,  H04B10/073 ,  H04B10/25 ,  H04B10/27 ,  H04B2210/078 ,  H04J14/02 ,  H04J14/0275 ,  H04L49/555 ,  H04L49/65 ,  H04Q11/00 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0016 ,  H04Q2011/0083

摘要： A communication network including a master switch and one or more local switches is provided with a loop-back test device for in line loop-back testing. The local switches convey communication traffic between one another using one or more channels of a transmission medium and configuration information using an out-of-band channel of the transmission medium that is separate from the channels used to convey the communication traffic. The master switch includes an application that generates configuration information including loop-back connection information for configuring the out-of-band channel using at least one loop-back test device, transmits the generated configuration information to the loop-back test device using the out-of-band channel of the transmission medium, and conducts loop-back testing using the out-of-band channel.

公开(公告)号：US20160285582A1

公开(公告)日：2016-09-29

申请号：US15016734

申请日：2016-02-05

申请人： FUJITSU LIMITED

发明人： Tomoyuki Kato ,  Shigeki Watanabe

IPC分类号： H04J14/02 ,  H04B10/079 ,  H04J14/06

CPC分类号： H04J14/0298 ,  H04B10/0775 ,  H04B10/07957 ,  H04B2210/078 ,  H04J14/0201

摘要： OADM processes input light containing reference light and multiplexed optical signals. A splitter splits the input light to generate first and second input light. A receiver generates an electric signal representing the second input light. An estimator estimates a difference in optical frequency between the reference light and a specified optical signal based on the electric signal. Alight source generates first and second light. An optical frequency of the second light is shifted by the estimated difference with respect to that of the first light. A demodulator generates a dropped signal representing the specified optical signal. A drive signal generator generates a drive signal in accordance with an inverted signal of the dropped signal. A modulator modulates the second light with the drive signal to generate a modulated optical signal. The first input light, the first light and the modulated optical signal are input to non-linear optical medium.

摘要翻译： OADM处理包含参考光和复用光信号的输入光。 分路器分离输入光以产生第一和第二输入光。 接收器产生表示第二输入光的电信号。 估计器基于电信号估计参考光和指定光信号之间的光频差。 光源产生第一和第二光。 第二光的光学频率相对于第一光的估计差异偏移。 解调器产生表示指定的光信号的丢弃信号。 驱动信号发生器根据丢弃信号的反相信号产生驱动信号。 调制器用驱动信号调制第二个光以产生调制的光信号。 第一输入光，第一光和调制光信号被输入到非线性光学介质。

公开(公告)号：US20150086192A1

公开(公告)日：2015-03-26

申请号：US14560500

申请日：2014-12-04

申请人： FUJITSU LIMITED

发明人： Takeshi SAKAMOTO

IPC分类号： H04B10/077 ,  H04J14/02

CPC分类号： H04B10/0775 ,  G01M11/335 ,  H04B10/0771 ,  H04B2210/078 ,  H04J14/0202

摘要： In order to determine a connection state of an optical fiber that connects a transmitting terminal and a plurality of receiving terminals, a test signal having a wavelength corresponding to a wavelength of an optical signal capable of being received at one receiving terminal among the plurality of receiving terminals is generated by clipping a portion of amplified spontaneous emission light. The generated test signal is transmitted through the optical fiber. Optical power of the test signal is detected at the one receiving terminal. The connection state of the optical fiber is determined based on a detection result of the optical power of the test signal.

摘要翻译： 为了确定连接发送终端和多个接收终端的光纤的连接状态，具有对应于能够在多个接收中的一个接收终端处接收的光信号的波长的波长的测试信号 通过限制放大的自发发射光的一部分来产生端子。 产生的测试信号通过光纤传输。 在一个接收终端检测测试信号的光功率。 基于测试信号的光功率的检测结果确定光纤的连接状态。

公开(公告)号：US08873949B2

公开(公告)日：2014-10-28

申请号：US13933199

申请日：2013-07-02

申请人： Verizon Patent and Licensing Inc.

发明人： Scott R. Kotrla ,  Matthew W. Turlington ,  Michael U. Bencheck ,  Tiejun J. Xia

IPC分类号： H04B10/00

CPC分类号： H04B10/0775 ,  H04B2210/078

摘要： A bit error generating device includes a light source, an input device, and a control processor. The control processor includes logic configured to: receive protocol or bitrate information regarding a live traffic signal via the input device; determine bit error simulation signal parameters based on the received protocol or bitrate information; configure the light source to generate the bit error simulation signal based on the bit error simulation signal parameters; and instruct the light source to inject the bit error simulation signal into an optical fiber carrying the live traffic signal.

摘要翻译： 位错误产生装置包括光源，输入装置和控制处理器。 所述控制处理器包括被配置为：经由所述输入设备接收关于实况交通信号的协议或比特率信息的逻辑; 基于接收的协议或比特率信息确定位错误模拟信号参数; 根据误码仿真信号参数配置光源产生误码仿真信号; 并指示光源将位错误模拟信号注入到携带实时话务信号的光纤中。

公开(公告)号：US08774624B2

公开(公告)日：2014-07-08

申请号：US12230172

申请日：2008-08-25

申请人： Miki Onaka ,  Yuichi Suzuki

发明人： Miki Onaka ,  Yuichi Suzuki

IPC分类号： H04B17/00

CPC分类号： H04J14/0221 ,  H04B10/077 ,  H04B2210/078

摘要： An optical communication system, where in an optical transmission apparatus arranged on a transmission side of respective repeating sections, an OSC optical amplifier is provided on an OSC light optical path between from an OSC transmitter to a multiplexer, and the OSC optical amplifier is controlled so that the power of OSC light transmitted on the transmission path becomes a previously set target value. As a result the OSC light is amplified by a different amplifying device to that for the main signal lights at the time of transmission. Therefore even in the case where the span losses are large, OSC light can be reliably received by the optical transmission apparatus on the reception side.

摘要翻译： 一种光通信系统，其中在配置在各重复部分的发送侧的光传输装置中，OSC光放大器设置在从OSC发射机到多路复用器之间的OSC光路上，并且OSC光放大器被控制为 在传输路径上传输的OSC光的功率变成预先设定的目标值。 结果，OSC光被不同的放大装置放大到在传输时主信号灯的放大装置。 因此，即使在跨度损耗大的情况下，也可以通过接收侧的光发送装置可靠地接收OSC灯。

公开(公告)号：US08121486B2

公开(公告)日：2012-02-21

申请号：US12027383

申请日：2008-02-07

申请人： Tetsuya Uda ,  Hiroshi Takeuchi

发明人： Tetsuya Uda ,  Hiroshi Takeuchi

IPC分类号： H04B10/08 ,  H04B10/02 ,  H04J14/02

CPC分类号： H04B10/0777 ,  H04B10/2931 ,  H04B2210/078

摘要： An optical transmission apparatus is arranged by: means for demultiplexing monitoring light for received wavelength-multiplexed signal light so as to detect optical intensity of the monitoring light; means for detecting optical intensity of wavelength-multiplexed signal light after the monitoring light has been demultiplexed therefrom; a gain controlling type optical amplifier for amplifying the wavelength-multiplexed signal light; an optical attenuating unit for adjusting optical intensity of the amplified wavelength-multiplexed signal light; and a monitoring control unit for controlling the gain controlling type optical amplifier in such a manner that the gain of the optical amplifier becomes constant, and for controlling an attenuating amount of the optical attenuating unit in such a manner that the optical intensity of the wavelength-multiplexed signal light becomes a predetermined target value.

摘要翻译： 光传输装置通过以下方式布置：用于对接收到的波长多路复用信号光进行多路化监视光的装置，以便检测监视光的光强度; 用于检测在监测光已被解复用之后波分复用信号光的光强度的装置; 用于放大波分复用信号光的增益控制型光放大器; 用于调节放大的波长复用信号光的光强度的光衰减单元; 以及监视控制单元，用于以使得光放大器的增益变得恒定的方式控制增益控制型光放大器，并且用于以这样的方式控制光衰减单元的衰减量： 复用信号光变为预定目标值。

公开(公告)号：US08014668B2

公开(公告)日：2011-09-06

申请号：US12017041

申请日：2008-01-20

申请人： Ping Wai Wan ,  Derrick Remedios ,  Patrick Chilufya Chimfwembe ,  Colin Geoffrey Kelly ,  James Benson Bacque

发明人： Ping Wai Wan ,  Derrick Remedios ,  Patrick Chilufya Chimfwembe ,  Colin Geoffrey Kelly ,  James Benson Bacque

IPC分类号： H04B10/00 ,  H04B10/08 ,  H04B10/12 ,  H04J14/08

CPC分类号： H04B10/0775 ,  H04B2210/075 ,  H04B2210/078

摘要： A method and apparatus for distributed measurement of chromatic dispersion in an optical network is disclosed. The network comprises optical switching nodes interconnected by optical links. An optical link may comprise multiple spans, each span ending in a transport module which comprises signal-processing components. At least one optical switching node has a probing signal generator transmitting an optical probing signal along a selected path in the network. Probing-signal detectors placed at selected transport modules determine chromatic-dispersion values and send results to a processing unit which determines appropriate placement of compensators or appropriate adjustments of compensators placed along the path. A preferred probing signal has the form of wavelength modulated optical carrier which is further intensity modulated by a periodic, preferably sinusoidal, probing tone. Variation in the phase-shift of the probing tone corresponding to variation of the wavelength of the optical probing signal determines chromatic-dispersion characteristics for different spans of the path.

摘要翻译： 公开了一种用于分布式测量光网络色散的方法和装置。 网络包括通过光链路互连的光交换节点。 光链路可以包括多个跨度，每个跨度结束于传输模块，其包括信号处理组件。 至少一个光交换节点具有探测信号发生器，沿着网络中的选定路径发射光探测信号。 放置在所选传输模块处的探测信号检测器确定色散值并将结果发送到处理单元，该处理单元确定补偿器的适当位置或沿路径放置的补偿器的适当调整。 优选的探测信号具有波长调制光载波的形式，其进一步通过周期性的，优选正弦的探测色调进行强度调制。 与光探测信号的波长变化相对应的探测音的相移的变化确定了路径不同跨度的色散特性。

公开(公告)号：US20110142439A1

公开(公告)日：2011-06-16

申请号：US12636927

申请日：2009-12-14

申请人： David Zhi Chen ,  Mark Anthony Ali

发明人： David Zhi Chen ,  Mark Anthony Ali

IPC分类号： H04B10/08

CPC分类号： H04B10/0775 ,  H04B10/2572 ,  H04B2210/078

摘要： A method may include generating a signal at an initiating device. A channel in an optical path may be identified, with the optical path including at least two spans. Simulated polarization mode dispersion (PMD) is injected into the signal to generate a test signal. The test signal is transmitted on the channel and received at a destination device. PMD effects in the test signal are compensated, and a measurement of PMD for the test signal is determined based on the compensation, the PMD for the test signal including PMD for the channel and the injected PMD. A measurement of the PMD for the channel is determined based on the PMD for the test signal and the injected PMD.

摘要翻译： 方法可以包括在发起设备处生成信号。 可以识别光路中的通道，其中光路包括至少两个跨度。 将模拟的偏振模色散（PMD）注入到信号中以产生测试信号。 测试信号在信道上发送并在目的设备处接收。 补偿测试信号中的PMD效应，并且基于补偿确定测试信号的PMD的测量值，包括用于信道的PMD和所注入的PMD的测试信号的PMD。 基于测试信号的PMD和注入的PMD来确定通道的PMD的测量。