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    IN-BAND OPTICAL SIGNAL-TO-NOISE RATIO MEASUREMENT
    1.
    发明申请
    IN-BAND OPTICAL SIGNAL-TO-NOISE RATIO MEASUREMENT 有权
    带内光信号噪声比测量

    公开(公告)号：US20120106951A1

    公开(公告)日：2012-05-03

    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

    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。

    In-band optical signal-to-noise ratio measurement
    2.
    发明授权
    In-band optical signal-to-noise ratio measurement 有权
    带内光信噪比测量

    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。

    NOISE TONE AVOIDANCE IN OPTICAL NETWORKS
    3.
    发明申请
    NOISE TONE AVOIDANCE IN OPTICAL NETWORKS 有权
    光网络噪音消除

    公开(公告)号：US20070280700A1

    公开(公告)日：2007-12-06

    申请号：US11754341

    申请日：2007-05-28

    申请人： Derrick Remedios ,  James Benson Bacque ,  Ping Wai Wan

    发明人： Derrick Remedios ,  James Benson Bacque ,  Ping Wai Wan

    IPC分类号： H04B10/04

    CPC分类号： H04J14/0298 ,  H04B10/07 ,  H04B2210/075 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/028

    摘要： Identification of optical channels in wavelength division multiplex (WDM) optical networks may be confounded by unwanted noise tones interfering with pilot/dither tones used for identifying optical channels. The invention describes a method of selecting pilot/dither tones that are selectively restricted to avoid allocating dither/pilot tone frequencies that appear as noise tones along the path of an optical channel in the optical network.

    摘要翻译： 在波分多路复用（WDM）光网络中的光信道的识别可能会受到干扰用于识别光信道的导频/抖动音调的不利噪声音调的混淆。 本发明描述了一种选择限制的导频/抖动音调的方法，以避免分配出沿着光网络中的光信道路径出现的噪声音调的抖动/导频音频率。

    Signal identification in optical communications networks
    4.
    发明申请
    Signal identification in optical communications networks 有权

    公开(公告)号：US20060291870A1

    公开(公告)日：2006-12-28

    申请号：US11511248

    申请日：2006-08-29

    申请人： Ping Wan ,  Derrick Remedios ,  Patrick Chimfwembe

    发明人： Ping Wan ,  Derrick Remedios ,  Patrick Chimfwembe

    IPC分类号： H04B10/04

    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.

    Method and apparatus for gain excursion minimization in automatic gain controlled optical systems
    6.
    发明授权
    Method and apparatus for gain excursion minimization in automatic gain controlled optical systems 有权
    自动增益控制光学系统中增益偏移最小化的方法和装置

    公开(公告)号：US06903867B2

    公开(公告)日：2005-06-07

    申请号：US10195495

    申请日：2002-07-16

    申请人： Eddie Kai Ho Ng ,  Ping Wai Wan ,  Derrick Remedios ,  Robert Michael Bierman ,  Dung Van Nguyen

    发明人： Eddie Kai Ho Ng ,  Ping Wai Wan ,  Derrick Remedios ,  Robert Michael Bierman ,  Dung Van Nguyen

    IPC分类号： H04B10/17 ,  H01S3/00

    CPC分类号： H04B10/2942 ,  H04B10/2935

    摘要： An apparatus and method for minimizing channel gain excursion in an optical system with automatic gain control is provided. The apparatus includes a feedback control loop which dynamically regulates the target gain of an automatic gain controlled (AGC) amplifier so as to compensate for the action of the AGC amplifier to maintain a constant linear average gain without accounting for the distribution of channels that carry signals across the amplifier spectral gain profile, which causes gain excursion of individual channels. The feedback control loop measures gain of individual channels and uses these measurements to regulate the target gain of the amplifier so as to minimize gain excursion of individual channels. If required, the apparatus may be integrated into a package. In one embodiment, the method for regulating the target gain is to maintain constant gain for all channels irrespective of the number of channels that carry a signal. This method is simple and guarantees no gain excursion. In another embodiment, a weight is assigned to an individual channel to calculate a weighted average for the target gain of the amplifier while attempting to minimize gain excursion of individual channels.

    摘要翻译： 提供一种用于使具有自动增益控制的光学系统中的通道增益偏移最小化的装置和方法。 该装置包括反馈控制回路，其动态地调节自动增益控制（AGC）放大器的目标增益，以便补偿AGC放大器的动作以维持恒定的线性平均增益，而不考虑携带信号的信道的分布 在放大器频谱增益曲线上，这导致单个通道的增益偏移。 反馈控制环路测量单个通道的增益，并使用这些测量来调节放大器的目标增益，以便最小化各个通道的增益偏移。 如果需要，该装置可以集成到包装中。 在一个实施例中，用于调节目标增益的方法是保持所有通道的恒定增益，而不管携带信号的通道数量如何。 这种方法很简单，保证没有增益偏移。 在另一个实施例中，将权重分配给单个信道以计算放大器的目标增益的加权平均值，同时尝试最小化各个信道的增益偏移。

    Near-real-time and real-time communications
    7.
    发明授权
    Near-real-time and real-time communications 有权

    公开(公告)号：US10305788B2

    公开(公告)日：2019-05-28

    申请号：US15199725

    申请日：2016-06-30

    申请人： Donald R. Ellis ,  Sylvain Chenard ,  Derrick Remedios ,  Chris J. Chartrand

    发明人： Donald R. Ellis ,  Sylvain Chenard ,  Derrick Remedios ,  Chris J. Chartrand

    IPC分类号： H04L12/707 ,  H04L12/727 ,  H04L1/00 ,  H04L29/06 ,  H04L29/08 ,  H04L12/721

    摘要： The present disclosure generally discloses capabilities for supporting new network zones and associated services. The network zones and associated services may include a near-real-time (NRT) zone and associated NRT services, a real-time (RT) zone and associated RT services, or the like. The resilient network zones and associated resilient and non-resilient services may be configured to provide bounded latency guarantees for reliably supporting various types of applications (e.g., mobile fronthaul, cloud computing, Internet-of-Things (IoT), or the like). The network zones and associated services may be provided using a distance-constrained fiber and wavelength switching fabric design comprised of various network devices and using associated controllers, which may be configured to support service provisioning functions, service testing functions, wavelength switching functions, and so forth.

    Noise tone avoidance in optical networks
    8.
    发明授权
    Noise tone avoidance in optical networks 有权
    光网络中的噪声音避免

    公开(公告)号：US07783193B2

    公开(公告)日：2010-08-24

    申请号：US11754341

    申请日：2007-05-28

    申请人： Derrick Remedios ,  James Benson Bacque ,  Ping Wai Wan

    发明人： Derrick Remedios ,  James Benson Bacque ,  Ping Wai Wan

    IPC分类号： H04B10/08

    CPC分类号： H04J14/0298 ,  H04B10/07 ,  H04B2210/075 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/028

    摘要： Identification of optical channels in wavelength division multiplex (WDM) optical networks may be confounded by unwanted noise tones interfering with pilot/dither tones used for identifying optical channels. The invention describes a method of selecting pilot/dither tones that are selectively restricted to avoid allocating dither/pilot tone frequencies that appear as noise tones along the path of an optical channel in the optical network.

    摘要翻译： 在波分多路复用（WDM）光网络中的光信道的识别可能会受到干扰用于识别光信道的导频/抖动音调的不利噪声音调的混淆。 本发明描述了一种选择限制的导频/抖动音调的方法，以避免分配出沿着光网络中的光信道路径出现的噪声音调的抖动/导频音频率。

    METHOD AND SYSTEM FOR POWER MANAGEMENT IN OPTICAL NETWORKS
    9.
    发明申请
    METHOD AND SYSTEM FOR POWER MANAGEMENT IN OPTICAL NETWORKS 有权
    光网络电源管理方法与系统

    公开(公告)号：US20070280687A1

    公开(公告)日：2007-12-06

    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： H04B10/20

    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。