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    • 11. 发明授权
    • Optical communication system having dynamic gain equalization
    • 具有动态增益均衡的光通信系统
    • US07075711B2
    • 2006-07-11
    • US10986817
    • 2004-11-15
    • Charles W. HaggansJun BaoHarshad SardesaiMichael Y. FrankelMahir NayfehBalakrishnan SridharVipul Bhatnagar
    • Charles W. HaggansJun BaoHarshad SardesaiMichael Y. FrankelMahir NayfehBalakrishnan SridharVipul Bhatnagar
    • H04B10/12H04J14/00
    • H04B10/296
    • An optical communication device, and related method, are provided for reducing ripple in WDM systems. In particular, the optical communication device includes a dynamic gain equalization (DGE) circuit is coupled to an optical communication path carrying the WDM optical signals. The DGE circuit adjusts the powers associated with each channel on a channel-by-channel basis so that the WDM optical signal has a desired power spectrum. The DGE is controlled in response to sense signals generated by an optical performance monitoring (OPM) circuit located downstream from the DGE or substantially co-located with the DGE. The OPM monitors the WDM spectrum for optical signal power variations and outputs the sense signal when the variations fall outside a given tolerance. Typically, one DGE is associated with a group of concatenated amplifiers so that multiple DGEs are provided in a system having many groups of such amplifiers. Likewise, multiple OPMs are provided in such systems, each corresponding to a respective DGE, so that ripple can be reduced and desired WDM optical signal powers can be achieved in the WDM system.
    • 提供了一种光通信设备及相关方法,用于减少WDM系统中的纹波。 特别地,光通信设备包括动态增益均衡(DGE)电路耦合到承载WDM光信号的光通信路径。 DGE电路在逐个通道的基础上调整与每个通道相关联的功率,使得WDM光信号具有所需的功率谱。 响应由位于DGE下游的光学性能监视(OPM)电路产生的感测信号或与DGE基本上同一位置来控制DGE。 OPM监视WDM频谱的光信号功率变化,并在变化值超出给定公差时输出感测信号。 通常,一个DGE与一组级联放大器相关联,使得在具有许多这种放大器组的系统中提供多个DGE。 类似地,在这样的系统中提供多个OPM,每个对应于相应的DGE,使得纹波可以减少,并且可以在WDM系统中实现期望的WDM光信号功率。