公开(公告)号：US07715710B2

公开(公告)日：2010-05-11

申请号：US11754675

申请日：2007-05-29

申请人： Ping Wai Wan ,  Derrick Remedios

发明人： Ping Wai Wan ,  Derrick Remedios

IPC分类号： H04B10/08

CPC分类号： H04B10/85 ,  H04B10/0775 ,  H04B10/07955

摘要： Methods and apparatus for optical-power control in an optical network employing wavelength-division multiplexed (WDM) optical-fiber links are devised to circumvent the effect of crosstalk caused by optical-power scattering. Each carrier signal is amplitude-modulated by an identifying tone, with the power of an identifying tone having a predetermined ratio to the power of its carrier signal. A fiber span within an optical-fiber link is tapped at a preferred monitoring point, and the power spectrum of the envelope of the tapped optical signal is measured. To estimate an individual carrier power, a temporary gain is applied and the power of a corresponding tone is measured. To control optical power of each wavelength carrier in several spans in the network, a network controller selects an order of processing the spans of interest, and selects the order of processing of each channel within each span.

摘要翻译： 设计了采用波分复用（WDM）光纤链路的光网络中的光功率控制方法和装置，以避免由光功率散射引起的串扰的影响。 每个载波信号由标识音进行幅度调制，其中识别音的功率与其载波信号的功率具有预定的比例。 光纤链路中的光纤跨段在优选的监控点被点击，并且测量了抽头光信号的包络的功率谱。 为了估计单个载波功率，施加临时增益并测量相应音调的功率。 为了控制网络中多个跨度的每个波长载波的光功率，网络控制器选择处理感兴趣的跨度的顺序，并选择每个跨度内每个信道的处理顺序。

公开(公告)号：US07652816B2

公开(公告)日：2010-01-26

申请号：US11615953

申请日：2006-12-23

申请人： Jason Christopher De Rocher ,  Hamish Iain MacDonald ,  Walter Joseph Carpini ,  Eddie Kai Ho Ng ,  Derrick Remedios ,  James Benson Bacque ,  Ping Wai Wan

发明人： Jason Christopher De Rocher ,  Hamish Iain MacDonald ,  Walter Joseph Carpini ,  Eddie Kai Ho Ng ,  Derrick Remedios ,  James Benson Bacque ,  Ping Wai Wan

IPC分类号： H01S4/00 ,  H04B10/12

CPC分类号： H04B10/275

摘要： This invention provides a method for commissioning and upgrading an optical ring network using its internal amplifiers as Automatic Spontaneous Emission sources of light that are used in making measurements. A modular segmented approach is adopted and the network is commissioned segment by segment. A flexible method is used for upgrading a commissioned network by adding or deleting a node or changing the internal configuration of a node. The method uses techniques for the correction of the Optical Signal to Noise Ratio induced error as well as the Spectral Filtering Error during the loss computation required for adjusting the gains of the amplifiers at each network node to an appropriate value. Since the method does not require an external laser source that needs to be moved manually from node to node it greatly reduces the commissioning time. Since it uses only the components of the network itself and does not deploy any additional device it also leads to a significant saving in cost.

摘要翻译： 本发明提供了一种使用其内部放大器调试和升级光环网络的方法，所述放大器是用于进行测量的自动自发发射光源。 采用模块化分段方式，逐段调试网络。 灵活的方法用于通过添加或删除节点或更改节点的内部配置来升级委托网络。 该方法使用用于校正光信噪比诱导误差的技术以及在将每个网络节点处的放大器的增益调整到适当值所需的损耗计算期间的光谱滤波误差。 由于该方法不需要需要从节点手动移动的外部激光源，因此大大减少了调试时间。 由于它仅使用网络组件本身，并且不部署任何其他设备，因此也可大大节省成本。

公开(公告)号：US20090257757A1

公开(公告)日：2009-10-15

申请号：US12488507

申请日：2009-06-19

申请人： Ping Wai Wan ,  Derrick Remedios ,  Patrick Chilufya Chimfwembe

发明人： Ping Wai Wan ,  Derrick Remedios ,  Patrick Chilufya Chimfwembe

IPC分类号： H04B10/06

CPC分类号： H04B10/50572 ,  H04B10/504 ,  H04B10/505 ,  H04J14/0258 ,  H04J14/0267 ,  H04J14/0276 ,  H04J14/0298

摘要： Signals in an optical communications network, such as optical channels in an optical WDM network for example, are each identified by at least two low frequency dither tones with which the signal is modulated. The dither tones alternate with a predetermined periodicity to produce a cyclically repeated sequence of dither tones. A network parameter, such as a channel identifier for example, is obtained by the detection of the particular combination of dither tones in the sequence. To detect a number of network parameters a signal is modulated with a number of cyclically repeated sequences of dither tones each uniquely identifying a respective network parameter. In some implementations each dither tone in a cyclically repeated sequence of dither tones is repeated with substantially the same phase and coherent averaging is performed over a number of periods to detect dither tones on low power signals.

摘要翻译： 诸如光学WDM网络中的光信道的光通信网络中的信号每个由至少两个低频抖动音频来标识，该信号被调制。 抖动色调以预定周期交替，以产生循环重复的抖动色调序列。 通过检测序列中的抖动音调的特定组合来获得诸如通道标识符的网络参数。 为了检测多个网络参数，用多个循环重复的抖动音调序列来调制信号，每个序列都是唯一地识别相应的网络参数。 在一些实现中，以基本上相同的相位重复循环重复的抖动音调序列中的每个抖动音调，并且在多个周期上执行相干平均以检测低功率信号上的抖动音调。

公开(公告)号：US07551858B2

公开(公告)日：2009-06-23

申请号：US11511248

申请日：2006-08-29

申请人： Ping Wai Wan ,  Derrick Remedios ,  Patrick Chilufya Chimfwembe

发明人： Ping Wai Wan ,  Derrick Remedios ,  Patrick Chilufya Chimfwembe

IPC分类号： H04B10/04 ,  H04B10/08

CPC分类号： H04B10/505 ,  H04B10/50572 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0278 ,  H04J14/0298

摘要： Signals in an optical communications network, such as optical channels in an optical WDM network for example, are each identified by at least two low frequency dither tones with which the signal is modulated. The dither tones alternate with a predetermined periodicity to produce a cyclically repeated sequence of dither tones. A network parameter, such as a channel identifier for example, is obtained by the detection of the particular combination of dither tones in the sequence. To detect a number of network parameters a signal is modulated with a number of cyclically repeated sequences of dither tones each uniquely identifying a respective network parameter. In some implementations each dither tone in a cyclically repeated sequence of dither tones is repeated with substantially the same phase and coherent averaging is performed over a number of periods to detect dither tones on low power signals.

摘要翻译： 诸如光学WDM网络中的光信道的光通信网络中的信号每个由至少两个低频抖动音频来标识，该信号被调制。 抖动色调以预定周期交替，以产生循环重复的抖动色调序列。 通过检测序列中的抖动音调的特定组合来获得诸如通道标识符的网络参数。 为了检测多个网络参数，用多个循环重复的抖动音调序列来调制信号，每个序列都是唯一地识别相应的网络参数。 在一些实现中，以基本上相同的相位重复循环重复的抖动音调序列中的每个抖动音调，并且在多个周期上执行相干平均以检测低功率信号上的抖动音调。

公开(公告)号：US07139480B2

公开(公告)日：2006-11-21

申请号：US10673790

申请日：2003-09-30

申请人： Eddie Kai Ho Ng ,  Derrick Remedios ,  Colin Geoffrey Kelly ,  Ping Wai Wan ,  John Frederick Groves

发明人： Eddie Kai Ho Ng ,  Derrick Remedios ,  Colin Geoffrey Kelly ,  Ping Wai Wan ,  John Frederick Groves

IPC分类号： H04B10/08

CPC分类号： H04B10/077 ,  H04B10/07955

摘要： A method and system for multi-level power management in an optical network is provided. They include three levels of power management. The first level of power management dynamically changes equipment settings in each module of equipment so that required module setpoint values in each module are achieved. The second level of power management determines module setpoint values for each module of equipment within each node in the optical link so that required node setpoint values are achieved. The third level of power management determines node setpoint values at each node in the optical link so that the optical link meets predetermined power specifications. If any of the three levels cannot achieve the required setpoint values, an error signal is generated by that level of power management and sent to the level of power management above it, thus initiating a higher level of power management. As a result, a dynamic and automatic adjustment to changing operating conditions and configurations in the network is provided, which allows to maintain relatively stable network powers. Each level of power management is implemented such that sections of the network can operate independent of each other, thus increasing the survivability of the network.

摘要翻译： 提供了一种用于光网络中多级电源管理的方法和系统。 它们包括三级电源管理。 第一级电源管理动态地更改设备的每个模块中的设备设置，从而实现每个模块中所需的模块设定值。 第二级电源管理确定光链路中每个节点内设备的每个模块的模块设定值，以便实现所需的节点设定值。 电源管理的第三级确定光链路中每个节点处的节点设定值，使得光链路满足预定的功率规格。 如果三个级别中的任何一个级别都不能达到要求的设定值，则通过该级别的功率管理生成错误信号并将其发送到其上方的电源管理级别，从而启动更高级别的电源管理。 结果，提供对网络中变化的操作条件和配置的动态和自动调整，这允许维持相对稳定的网络功率。 每个级别的电源管理被实现，使得网络的各部分可以彼此独立地操作，从而增加网络的生存性。

公开(公告)号：US07139069B2

公开(公告)日：2006-11-21

申请号：US11065098

申请日：2005-02-25

申请人： James Benson Bacque ,  Ping Wai Wan ,  Derrick Remedios ,  Eddie Kai Ho Ng

发明人： James Benson Bacque ,  Ping Wai Wan ,  Derrick Remedios ,  Eddie Kai Ho Ng

IPC分类号： G01N21/00

CPC分类号： H04B10/077 ,  H04B10/07955

摘要： A multi-stage method and apparatus for determining a faulty component location along an optical path through an optical fiber in an optical network are disclosed. A total power of the optical fiber, and a total wavelength power as a sum of powers of the individual wavelengths at a plurality of local detection points are measured and compared at the local detection points, followed by determining whether or not a faulty detection point exists along the optical path. If a fault is identified, the method provides a multi-stage fault detection procedure, including measuring a total wavelength power loss between a local detection point and an adjacent detection point, between the local detection point and multiple non-adjacent detection points, and a correlation of the measured total wavelength power losses between the various detection points. A corresponding apparatus for determining the faulty component location in the optical network is also provided.

摘要翻译： 公开了一种用于通过光网络中的光纤确定沿着光路的故障部件位置的多级方法和装置。 在本地检测点测量光纤的总功率和总波长功率作为多个本地检测点处的各个波长的功率之和，然后确定是否存在故障检测点 沿光路。 如果识别故障，则该方法提供多级故障检测程序，包括测量本地检测点与相邻检测点之间，本地检测点与多个非相邻检测点之间的总波长功率损耗，以及 在各种检测点之间测量的总波长功率损耗的相关性。 还提供了用于确定光网络中的故障组件位置的相应设备。

公开(公告)号：US09425894B2

公开(公告)日：2016-08-23

申请号：US12916028

申请日：2010-10-29

申请人： Ping W. Wan ,  Derrick Remedios

发明人： Ping W. Wan ,  Derrick Remedios

IPC分类号： H04B10/08 ,  H04B10/077 ,  H04B10/079

CPC分类号： H04B10/0775 ,  H04B10/07953

摘要： Various embodiments relate to an in-band measurement of the optical signal-to-noise ratio (OSNR) of an optical signal in an optically-amplified transmission system. A demodulation device may tap a transmission fiber to receive an optical signal containing a low-frequency signal. A filter may implement first and second passbands to filter portions of an optical channel in the optical signal. Once the filtered channel is converted to first and second target electrical signals, a measurement circuit may take measurements of DC and AC components for each of the target electrical signals. Based on measurements of the two target electrical signals, the demodulation device may calculate the OSNR as a function of the DC and AC components, or as a function of the adjustment factors between first and second passbands of the optical channel represented by the first and second target electrical signals.

摘要翻译： 各种实施例涉及光放大传输系统中光信号的光信噪比（OSNR）的带内测量。 解调装置可以抽头传输光纤以接收包含低频信号的光信号。 滤波器可以实现第一和第二通带以过滤光信号中的光信道的部分。 一旦滤波的信道被转换成第一和第二目标电信号，测量电路可以对每个目标电信号进行DC和AC分量的测量。 基于两个目标电信号的测量，解调装置可以根据DC和AC分量来计算OSNR，或者作为由第一和第二信号表示的光信道的第一和第二通带之间的调整因子的函数 目标电信号。

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：US20100283996A1

公开(公告)日：2010-11-11

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： G01N21/00

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：US07548549B2

公开(公告)日：2009-06-16

申请号：US11265245

申请日：2005-11-03

申请人： Jeffrey James Bergeron ,  Huck Kung Loh ,  James Benson Bacque ,  Derrick Remedios

发明人： Jeffrey James Bergeron ,  Huck Kung Loh ,  James Benson Bacque ,  Derrick Remedios

IPC分类号： H04L12/413

CPC分类号： H04L12/2801

摘要： Ethernet packets are transmitted in full duplex mode over a single coaxial cable, such as RG6 and RG59. Symmetrical full duplex operation is achieved by separating the upstream and downstream signals in the frequency domain whereby a 100BaseT signal is transmitted unmodified in one direction while the other is modulated upon a high frequency carrier to be transmitted in the other direction. In a second embodiment, the separation is in the time domain whereby the signals are sampled in blocks, each block compressed in time and transmitted at a higher rate, thus allowing for the interleaving of upstream and downstream blocks on the same coaxial cable. In a third embodiment, different rate upstream and downstream signals are separated in the frequency domain, but without modulation. The resulting asymmetrical 1000/100 Mb/s Ethernet over coax link is valuable in network architectures where asymmetry in the up and down traffic loads is expected.

摘要翻译： 以全双工模式通过单个同轴电缆（如RG6和RG59）传输以太网数据包。 通过分离频域中的上行和下行信号来实现对称全双工操作，由此100BaseT信号在一个方向上未被修改而另一个在高频载波上被调制以在另一个方向上传输。 在第二实施例中，分离在时域中，由此信号以块为单位进行采样，每个块在时间上压缩并以较高的速率传输，从而允许同一同轴电缆上的上游和下游块的交错。 在第三实施例中，不同速率的上行和下行信号在频域中被分离，但是没有调制。 所产生的不对称1000 / 100Mb / s以太网同轴电缆链路在网络架构中是有价值的，其中预期上行和下行业务负载的不对称性。