利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

12 条记录 (耗时 0.011 秒)

    Method and apparatus for monitoring optical signal-to-noise ratio
    1.
    发明授权
    Method and apparatus for monitoring optical signal-to-noise ratio 有权
    用于监测光信噪比的方法和装置

    公开(公告)号：US07440170B2

    公开(公告)日：2008-10-21

    申请号：US11426035

    申请日：2006-06-23

    申请人： Yuan-Hua Kao ,  Xiang Liu

    发明人： Yuan-Hua Kao ,  Xiang Liu

    IPC分类号： G02B5/13 ,  H04B10/08

    CPC分类号： H04B10/07953

    摘要： Optical signal-to-noise ratio (OSNR) monitoring methods and apparatus are described. A tunable optical filter filters an optical channel containing an optical signal and noise. The total signal and noise power at the output of the filter is measured as the transmittance passband of the filter is varied and the maximum and minimum powers are determined. The ratio between the maximum and minimum powers is then used to determine the OSNR of the optical channel, which, for example, can be a wavelength channel in a wavelength division multiplexing (WDM) system. The ratio of the maximum signal power to the minimum signal power and the ratio of the maximum noise power to the minimum noise power are pre-determined based on the signal modulation format type and filter passband characteristics. Because the OSNR monitoring method and apparatus rely on information obtained after spectrally filtering the signal and noise, their operation is independent of any transmission effect that does not affect the optical power spectra of the signal and the noise or affects them in a known manner. For example, effects such as chromatic dispersion (CD), polarization-mode dispersion (PMD), and changes in the signal degree of polarization (DOP) and noise DOP will not affect the OSNR reading thus obtained.

    摘要翻译： 描述了光信噪比（OSNR）监测方法和装置。 可调光滤波器对包含光信号和噪声的光通道进行滤波。 滤波器输出端的总信号和噪声功率在滤波器的透射率通过频带发生变化并确定最大和最小功率时进行测量。 然后，使用最大和最小功率之间的比率来确定光通道的OSNR，其例如可以是波分复用（WDM）系统中的波长信道。 基于信号调制格式类型和滤波器通带特性，预先确定最大信号功率与最小信号功率的比率以及最大噪声功率与最小噪声功率的比率。 由于OSNR监视方法和装置依赖于在对信号和噪声进行频谱滤波之后获得的信息，所以它们的操作与不影响信号的光功率谱和噪声的任何传输效应无关，或以已知的方式影响它们。 例如，诸如色散（CD），偏振模色散（PMD）和信号偏振度（DOP）和噪声DOP的变化的影响将不会影响如此获得的OSNR读数。

    LOSS OF SIGNAL DETECTION
    3.
    发明申请
    LOSS OF SIGNAL DETECTION 失效
    信号丢失检测

    公开(公告)号：US20090003830A1

    公开(公告)日：2009-01-01

    申请号：US11772107

    申请日：2007-06-29

    申请人： Daniel FISHMAN ,  Alan GNAUCK ,  Yuan-Hua KAO ,  Xiang LIU

    发明人： Daniel FISHMAN ,  Alan GNAUCK ,  Yuan-Hua KAO ,  Xiang LIU

    IPC分类号： H04J14/02

    CPC分类号： H04J14/02 ,  H04J14/0221

    摘要： An apparatus and a method for accurately detecting Loss of Optical Power (LOS) by noise power cancellation effect and optical power is measured at two output ports of an athermal periodic filter, wherein one output port in the optical frequency domain, is aligned with the signal channels of an input WDM signal (on-grid port), whereas the second output port is aligned complementary to the first output port (off-grid port). In a preferred embodiment, the apparatus computes the ratio of the measured optical powers at the two output ports of the periodic filter, and comparing them to a threshold value that is determined from the overall common-mode rejection ratio (CMRR) of the detection apparatus. In an alternative embodiment, the apparatus additionally compares the optical power measured at the on-grid port to a threshold power that is determined from system design parameters.

    摘要翻译： 在无热周期滤波器的两个输出端口处测量通过噪声功率消除效应和光功率精确检测光功率损失（LOS）的装置和方法，其中光频域中的一个输出端口与信号对准 输入WDM信号（并网端口）的通道，而第二输出端口与第一输出端口（离网端口）互补。 在优选实施例中，该装置计算在周期滤波器的两个输出端口处测量的光功率的比率，并将其与由检测装置的总体共模抑制比（CMRR）确定的阈值进行比较 。 在替代实施例中，该装置还将在网格端口处测量的光功率与从系统设计参数确定的阈值功率进行比较。

    Method and apparatus for transmitting a modulated optical signal
    7.
    发明授权
    Method and apparatus for transmitting a modulated optical signal 有权
    用于发送调制光信号的方法和装置

    公开(公告)号：US06671079B2

    公开(公告)日：2003-12-30

    申请号：US10016904

    申请日：2001-12-14

    申请人： Richard Clair Fuller ,  Yuan-Hua Kao ,  Frank J. Peragine

    发明人： Richard Clair Fuller ,  Yuan-Hua Kao ,  Frank J. Peragine

    IPC分类号： G02F103

    CPC分类号： H04B10/50577 ,  G02F1/0123 ,  H04B10/5051 ,  H04B10/50572 ,  H04B10/50575 ,  H04B10/508

    摘要： A method and apparatus for transmitting a modulated optical signal includes a continuous source of light, a first optical modulator for generating an optical pulse stream in response to a radio frequency (RF) driving signal and a DC bias signal, and a second modulator for modulating the optical pulse stream with an electrical data signal. A processor dithers the phase of the RF driving signal using a first dither signal and the level of the DC bias signal using a second dither signal. The processor detects the first and/or second dither signals in the modulated optical signal and adjusts the phase of the RF driving signal and/or level of the DC bias signal to null the detected first and/or second dither signal.

    摘要翻译： 用于发送调制光信号的方法和装置包括连续光源，响应于射频（RF）驱动信号和DC偏置信号产生光脉冲流的第一光调制器和用于调制 具有电数据信号的光脉冲流。 处理器使用第一抖动信号和使用第二抖动信号的DC偏置信号的电平来抖动RF驱动信号的相位。 处理器检测调制光信号中的第一和/或第二抖动信号，并且调整RF驱动信号的相位和/或DC偏置信号的电平，使检测到的第一和/或第二抖动信号为零。

    RF connector with impedance matching tab
    9.
    发明授权
    RF connector with impedance matching tab 有权
    RF连接器，带阻抗匹配片

    公开(公告)号：US06302701B1

    公开(公告)日：2001-10-16

    申请号：US09584010

    申请日：2000-05-30

    申请人： Thomas J. Miller, Jr. ,  Yuan-Hua Kao ,  Bettina A. Nechay ,  Hidenori Nakanishi ,  Takashi Igarashi ,  Motoyoshi Tanaka

    发明人： Thomas J. Miller, Jr. ,  Yuan-Hua Kao ,  Bettina A. Nechay ,  Hidenori Nakanishi ,  Takashi Igarashi ,  Motoyoshi Tanaka

    IPC分类号： H01R1200

    CPC分类号： H01R24/44 ,  H01R24/52 ,  H01R2103/00

    摘要： A sub-miniature push-on RF connector for connecting a transmission line to a signal sink. The connector has a shielded transmission line section having a signal line and a ground line extending axially through the connector. A center pin is coupled to the signal line and extends from the center of a front face of the connector in an axial direction. A semicircular tab coupled to the ground line extends from the front face of the connector substantially along the length of the center pin and partially surrounding the center pin to reduce an air gap impedance, the tab having first and second wire bonding surfaces at the ends of the semicircular shape thereof and disposed adjacent to said center pin.

    摘要翻译： 用于将传输线连接到信号接收器的小型推式射频连接器。 连接器具有屏蔽传输线部分，其具有信号线和沿着连接器轴向延伸的接地线。 中心销耦合到信号线，并从连接器的前表面的中心沿轴向延伸。 耦合到接地线的半圆形突片基本上沿着中心销的长度从连接器的前表面延伸，并部分地围绕中心销，以减小气隙阻抗，该突片在第一和第二引线接合表面位于 其半圆形并且与所述中心销相邻地设置。

    Loss of signal detection
    10.
    发明授权
    Loss of signal detection 失效
    信号检测丢失

    公开(公告)号：US07941048B2

    公开(公告)日：2011-05-10

    申请号：US11772107

    申请日：2007-06-29

    申请人： Daniel Fishman ,  Alan Gnauck ,  Yuan-Hua Kao ,  Xiang Liu

    发明人： Daniel Fishman ,  Alan Gnauck ,  Yuan-Hua Kao ,  Xiang Liu

    IPC分类号： H04B10/08 ,  H04B17/00

    CPC分类号： H04J14/02 ,  H04J14/0221

    摘要： An apparatus and a method for accurately detecting Loss of Optical Power (LOS) by noise power cancellation effect and optical power is measured at two output ports of an athermal periodic filter, wherein one output port in the optical frequency domain, is aligned with the signal channels of an input WDM signal (on-grid port), whereas the second output port is aligned complementary to the first output port (off-grid port). In a preferred embodiment, the apparatus computes the ratio of the measured optical powers at the two output ports of the periodic filter, and comparing them to a threshold value that is determined from the overall common-mode rejection ratio (CMRR) of the detection apparatus. In an alternative embodiment, the apparatus additionally compares the optical power measured at the on-grid port to a threshold power that is determined from system design parameters.

    摘要翻译： 在无热周期滤波器的两个输出端口处测量通过噪声功率消除效应和光功率精确检测光功率损失（LOS）的装置和方法，其中光频域中的一个输出端口与信号对准 输入WDM信号（并网端口）的通道，而第二输出端口与第一输出端口（离网端口）互补。 在优选实施例中，该装置计算在周期滤波器的两个输出端口处测量的光功率的比率，并将其与由检测装置的总体共模抑制比（CMRR）确定的阈值进行比较 。 在替代实施例中，该装置还将在网格端口处测量的光功率与从系统设计参数确定的阈值功率进行比较。