Dispersion compensating apparatus and dispersion compensation control method
    2.
    发明授权
    Dispersion compensating apparatus and dispersion compensation control method 有权
    色散补偿装置和色散补偿控制方法

    公开(公告)号:US07869715B2

    公开(公告)日:2011-01-11

    申请号:US11785896

    申请日:2007-04-20

    IPC分类号: H04B10/12

    CPC分类号: H04B10/25133

    摘要: A variable dispersion compensating unit compensates an optical signal, and changes the compensation amount according to a control signal that has a given frequency. After demodulation of the compensated optical signal, error conditions of the signal are monitored and an error signal is output. A band pass filter filters the error signal for a component having a frequency equal to or less than the given frequency. Based on the component and on the control signal, a synchronous detecting circuit generates a compensation amount modification signal. The compensation amount modification signal is superposed on the control signal.

    摘要翻译: 可变色散补偿单元补偿光信号,并根据具有给定频率的控制信号改变补偿量。 在对补偿的光信号进行解调之后,监视信号的误差状况并输出误差信号。 带通滤波器滤波具有等于或小于给定频率的频率的分量的误差信号。 基于分量和控制信号,同步检测电路产生补偿量修正信号。 补偿量修正信号叠加在控制信号上。

    Dispersion compensating apparatus and dispersion compensation control method
    3.
    发明申请
    Dispersion compensating apparatus and dispersion compensation control method 有权
    色散补偿装置和色散补偿控制方法

    公开(公告)号:US20080056710A1

    公开(公告)日:2008-03-06

    申请号:US11785896

    申请日:2007-04-20

    IPC分类号: H04B17/00

    CPC分类号: H04B10/25133

    摘要: A variable dispersion compensating unit compensates an optical signal, and changes the compensation amount according to a control signal that has a given frequency. After demodulation of the compensated optical signal, error conditions of the signal are monitored and an error signal is output. A band pass filter filters the error signal for a component having a frequency equal to or less than the given frequency. Based on the component and on the control signal, a synchronous detecting circuit generates a compensation amount modification signal. The compensation amount modification signal is superposed on the control signal.

    摘要翻译: 可变色散补偿单元补偿光信号,并根据具有给定频率的控制信号改变补偿量。 在对补偿的光信号进行解调之后,监视信号的误差状况并输出误差信号。 带通滤波器滤波具有等于或小于给定频率的频率的分量的误差信号。 基于分量和控制信号,同步检测电路产生补偿量修正信号。 补偿量修正信号叠加在控制信号上。

    Method and System for Transmitting Information in an Optical Communication System Using Distributed Amplification
    6.
    发明申请
    Method and System for Transmitting Information in an Optical Communication System Using Distributed Amplification 审中-公开
    在使用分布式放大的光通信系统中传输信息的方法和系统

    公开(公告)号:US20090136229A1

    公开(公告)日:2009-05-28

    申请号:US12359406

    申请日:2009-01-26

    IPC分类号: H04J14/00

    摘要: A method and system for transmitting information in an optical communication system includes modulating a non-intensity characteristic of an optical carrier signal with a data signal to generate an optical information signal. The optical information signal is transmitted over an optical link. The optical information signal is amplified over a length of the optical link with a co-launched amplification signal traveling in the optical link in a same direction as the optical information signal.

    摘要翻译: 用于在光通信系统中发送信息的方法和系统包括用数据信号调制光载波信号的非强度特性以产生光信息信号。 光信息信号通过光链路传输。 光信息信号在光链路的长度上以与光信息信号相同的方向在光链路中行进的共同放大信号放大。

    Optical receiver and optical receiving method corresponding to differential M-phase shift keying system

    公开(公告)号:US20060280510A1

    公开(公告)日:2006-12-14

    申请号:US11397690

    申请日:2006-04-05

    IPC分类号: H04B10/04

    摘要: An optical receiver comprises branching units for branching and supplying the signal lights to be inputted to the first to fourth optical waveguides provided on a substrate, second to third optical waveguides for giving delay time differences corresponding to a symbol of the DMPSK modulated signal, a demodulating unit for demodulating two light signals through interference of signal lights between the first to second optical waveguides and between the third to fourth optical waveguides, two optical detectors for converting two light signals from the demodulating unit, and a light path length varying unit for identically varying each light path length of two optical waveguides being arranged through selection of combinations of the first and third optical waveguides, the first and fourth optical waveguides, and the second and third optical waveguides in one region when the wavelength of the signal light is varied.

    Method and system for demultiplexing non-intensity modulated wavelength division multiplexed (WDM) signals
    8.
    发明授权
    Method and system for demultiplexing non-intensity modulated wavelength division multiplexed (WDM) signals 失效
    用于解复用非强度调制波分复用(WDM)信号的方法和系统

    公开(公告)号:US07035543B1

    公开(公告)日:2006-04-25

    申请号:US09853316

    申请日:2001-05-10

    IPC分类号: H04J14/02

    摘要: A method and system for demultiplexing non-intensity modulated wavelength division multiplexed (WDM) signals includes receiving a WDM signal having a plurality of non-intensity modulated optical information signals. A plurality of the non-intensity modulated optical information signals are converted to intensity modulated signals while the plurality of non-intensity modulated optical information signals are multiplexed in at least a portion of the WDM signal.

    摘要翻译: 用于解复用非强度调制波分复用(WDM)信号的方法和系统包括接收具有多个非强度调制光信息信号的WDM信号。 多个非强度调制光信息信号被转换为强度调制信号,而多个非强度调制光信息信号在WDM信号的至少一部分被复用。

    Chromatic dispersion monitoring method and chromatic dispersion monitoring apparatus, and optical transmission system
    9.
    发明授权
    Chromatic dispersion monitoring method and chromatic dispersion monitoring apparatus, and optical transmission system 有权
    色散监测方法和色散监测装置,以及光传输系统

    公开(公告)号:US07769299B2

    公开(公告)日:2010-08-03

    申请号:US11475046

    申请日:2006-06-27

    IPC分类号: H04B10/12 H04B10/00

    摘要: A chromatic dispersion monitoring apparatus according to the present invention comprises: a photodetector which photo-electrically converts an optical signal; a low-pass filter which limits a frequency bandwidth of the photo-electrically converted electrical signal to be within a range set according to a modulation format of the optical signal and a bit rate thereof; a DC elimination circuit which eliminates a direct current component of the bandwidth limited electrical signal; and a power detector which detects the power of the bandwidth limited electrical signal to detect the residual dispersion of the optical signal. As a result, it becomes possible to easily realize the chromatic dispersion monitoring apparatus of low cost, which is also capable to be arranged on an in-line.

    摘要翻译: 根据本发明的色散监视装置包括:光电转换光信号的光电检测器; 将光电转换电信号的频带宽度限制在根据光信号的调制格式及其比特率设定的范围内的低通滤波器; DC消除电路,其消除带宽受限电信号的直流分量; 以及功率检测器,其检测带宽受限电信号的功率,以检测光信号的残余色散。 结果,可以容易地实现也能够排列在一起的低成本的色散监视装置。

    Optical waveform shaper
    10.
    发明申请
    Optical waveform shaper 有权
    光波形整形器

    公开(公告)号:US20050220388A1

    公开(公告)日:2005-10-06

    申请号:US11094642

    申请日:2005-03-31

    摘要: The optical waveform shaper comprises a plurality of interferometers connected in series. The transfer function of each interferometer is either one of a first transfer function, in which the second order derivative of the output optical power in respect to the input optical power is positive when the input optical power is in the neighborhood of zero, or a second transfer function, and the output optical power shows substantially periodical changes to the input optical power, or a second transfer function, in which the second order derivative of the output optical power in respect to the input optical power is negative when the input optical power is in the neighborhood of zero, or a second transfer function, and the output optical power shows substantially periodical changes to the input optical power. At least one of the interferometers uses the second transfer function.

    摘要翻译: 光波形整形器包括串联连接的多个干涉仪。 每个干涉仪的传递函数是第一传递函数中的一个,其中输入光功率相对于输入光功率的输出光功率的二阶导数在输入光功率在零附近为正时,或第二传递函数 传输函数,输出光功率对输入光功率或第二传递函数实质上周期性地改变,其中当输入光功率为输入光功率时,输出光功率的二阶导数相对于输入光功率为负值 在零附近或第二传递函数中,并且输出光功率基本上周期性地改变输入光功率。 至少一个干涉仪使用第二传递函数。