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11. 发明授权

US07075711B2 Optical communication system having dynamic gain equalization 有权
标题翻译：具有动态增益均衡的光通信系统
公开(公告)号：US07075711B2
公开(公告)日：2006-07-11
申请号：US10986817
申请日：2004-11-15
申请人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar , Vipul Bhatnagar
发明人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar , Vipul Bhatnagar
IPC分类号： H04B10/12 , H04J14/00
CPC分类号： H04B10/296
摘要： 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.
摘要翻译：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。

12. 发明授权

US06522455B1 WDM optical communication system having a dispersion slope compensating element 失效
标题翻译： WDM光通信系统具有色散斜率补偿元件
公开(公告)号：US06522455B1
公开(公告)日：2003-02-18
申请号：US09506007
申请日：2000-02-17
申请人： Harshad Sardesai
发明人： Harshad Sardesai
IPC分类号： G02F133
CPC分类号： G02B6/29376 , G02B6/29317 , H04B10/2519
摘要： Consistent with the present invention, in-fiber Bragg gratings are used to demultiplex optical signals in a WDM optical communication system. The in-fiber Bragg gratings also perform dispersion compensation of the selected optical signals. As a result, additional segments of DCF for further dispersion compensation are rendered unnecessary. Improved performance is thus achieved with an inexpensive and simplified system design.
摘要翻译：根据本发明，使用光纤内布拉格光栅来解复用WDM光通信系统中的光信号。光纤内布拉格光栅还对选定的光信号进行色散补偿。因此，不需要用于进一步色散补偿的附加的DCF段。因此，通过廉价且简化的系统设计来实现改进的性能。

13. 发明授权

US06967768B1 Optical communication system having dynamic gain equalization 有权
公开(公告)号：US06967768B1
公开(公告)日：2005-11-22
申请号：US10144082
申请日：2002-05-13
申请人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar
发明人： Charles W. Haggans , Jun Bao , Harshad Sardesai , Michael Y. Frankel , Mahir Nayfeh , Balakrishnan Sridhar
摘要： 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.

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