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1. 发明申请

US20100111530A1 POLARIZATION MODE DISPERSION COMPENSATION AND POLARIZATION DEMULTIPLEXING SYSTEMS AND METHODS FOR OPTICAL TRANSMISSION SYSTEMS 有权
标题翻译：极化模式分散补偿和极化解复用系统和光传输系统的方法
公开(公告)号：US20100111530A1
公开(公告)日：2010-05-06
申请号：US12263301
申请日：2008-10-31
申请人： Yunfeng Shen , Shan Zhong , Harshad Sardesai
发明人： Yunfeng Shen , Shan Zhong , Harshad Sardesai
IPC分类号： H04J14/06
CPC分类号： H04J14/06 , H04B10/2572
摘要： The present disclosure provides polarization mode dispersion compensation (PMDC) and polarization de-multiplexing systems and methods for polarization multiplexed (PolMux) optical transmission systems. The PMDC detects an error signal before a polarization splitter in PolMux systems for controlling polarization controllers (PC) and/or DGDs in the PMDC for return-to-zero (RZ) differential m-phase shift keying (DmPSK) signals. For bit-aligned PolMux systems, the error signal could be the level of clock frequency at one, two, or more times of the baud rate at one polarization. For bit-interleaved PolMux systems, the error signal could be the level of clock frequency at two times of the baud rate at one polarization. The PMDC can operate in PolMux systems with any arbitrary time offset between the two polarizations. The polarization de-multiplexer utilizes error detection at both output arms of a polarization splitter to mitigate PDL impact on any PolMux type of signal.
摘要翻译：本公开提供了用于偏振复用（PolMux）光传输系统的偏振模色散补偿（PMDC）和极化解复用系统和方法。 PMDC在PolMux系统中的偏振分离器之前检测到一个误差信号，用于控制PMDC中的偏振控制器（PC）和/或DGD，用于归零（RZ）差分m相移键控（DmPSK）信号。对于位对齐的PolMux系统，错误信号可能是在一个极化波特率的一个，两个或更多次时钟频率的电平。对于位交错的PolMux系统，错误信号可能是在一个极化波特率的两倍时钟频率的电平。 PMDC可以在PolMux系统中运行，在两个极化之间任意时间偏移。极化解复用器利用偏振分离器的两个输出臂的误差检测来减轻PDL对任何PolMux类型信号的影响。

2. 发明授权

US07092148B1 Optical communication system having dynamic gain equalization 有权
公开(公告)号：US07092148B1
公开(公告)日：2006-08-15
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 , 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： H01S3/00
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.

3. 发明申请

US20050094252A1 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：US20050094252A1
公开(公告)日：2005-05-05
申请号：US10986817
申请日：2004-11-15
申请人： Charles Haggans , Jun Bao , Harshad Sardesai , Michael Frankel , Mahir Nayfeh , Balakrishnan Sridhar
发明人： Charles Haggans , Jun Bao , Harshad Sardesai , Michael Frankel , Mahir Nayfeh , Balakrishnan Sridhar
IPC分类号： H01S3/00 , H04B10/17
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。

4. 发明授权

US08433193B2 Systems and methods for channel power offsets for multi data rate DWDM transmission over optical add drop multiplexers 有权
标题翻译：用于通过光分插复用器进行多数据速率DWDM传输的信道功率偏移的系统和方法
公开(公告)号：US08433193B2
公开(公告)日：2013-04-30
申请号：US12262869
申请日：2008-10-31
申请人： John J. Veselka, Jr. , Harshad Sardesai
发明人： John J. Veselka, Jr. , Harshad Sardesai
IPC分类号： H04B10/00
CPC分类号： H04J14/0221 , H04J14/021
摘要： The present disclosure provides systems and methods for channel power offsets for multi-rate dense wave division multiplexed (DWDM) transmission over optical add-drop multiplexers (OADMs). The present invention includes algorithms to set power levels of each type of channel in different sections of a fiber system to optimize the performance of that type of channel at the receiver. For example, the present invention can optimize power levels based on different channel modulation formats, bit rates, channel spacings, and the like. Advantageously, the present invention improves the total capacity (bit rate) and reach that channels of a given bit rate can achieve, and maximizes the reach of channels without sacrificing capacity.
摘要翻译：本公开提供了用于通过光分插复用器（OADM）的多速率密集波分复用（DWDM）传输的信道功率偏移的系统和方法。本发明包括用于设置光纤系统的不同部分中的每种类型的信道的功率电平的算法，以优化接收机处的那种类型的信道的性能。例如，本发明可以基于不同的信道调制格式，比特率，信道间隔等来优化功率电平。有利地，本发明改进了总容量（比特率）并且达到给定比特率可以实现的信道，并且使信道的覆盖范围最大化，而不会牺牲容量。

5. 发明授权

US08045856B2 Polarization mode dispersion compensation and polarization demultiplexing systems and methods for optical transmission systems 有权
标题翻译：偏振模色散补偿和偏振解复用系统和光传输系统的方法
公开(公告)号：US08045856B2
公开(公告)日：2011-10-25
申请号：US12263301
申请日：2008-10-31
申请人： Yunfeng Shen , Shan Zhong , Harshad Sardesai
发明人： Yunfeng Shen , Shan Zhong , Harshad Sardesai
IPC分类号： H04J14/06
CPC分类号： H04J14/06 , H04B10/2572
摘要： The present disclosure provides polarization mode dispersion compensation (PMDC) and polarization de-multiplexing systems and methods for polarization multiplexed (PolMux) optical transmission systems. The PMDC detects an error signal before a polarization splitter in PolMux systems for controlling polarization controllers (PC) and/or DGDs in the PMDC for return-to-zero (RZ) differential m-phase shift keying (DmPSK) signals. For bit-aligned PolMux systems, the error signal could be the level of clock frequency at one, two, or more times of the baud rate at one polarization. For bit-interleaved PolMux systems, the error signal could be the level of clock frequency at two times of the baud rate at one polarization. The PMDC can operate in PolMux systems with any arbitrary time offset between the two polarizations. The polarization de-multiplexer utilizes error detection at both output arms of a polarization splitter to mitigate PDL impact on any PolMux type of signal.
摘要翻译：本公开提供了用于偏振复用（PolMux）光传输系统的偏振模色散补偿（PMDC）和极化解复用系统和方法。 PMDC在PolMux系统中的偏振分离器之前检测到一个误差信号，用于控制PMDC中的偏振控制器（PC）和/或DGD，用于归零（RZ）差分m相移键控（DmPSK）信号。对于位对齐的PolMux系统，错误信号可能是在一个极化波特率的一个，两个或更多次时钟频率的电平。对于位交错的PolMux系统，错误信号可能是在一个极化波特率的两倍时钟频率的电平。 PMDC可以在PolMux系统中运行，在两个极化之间任意时间偏移。极化解复用器利用偏振分离器的两个输出臂的误差检测来减轻PDL对任何PolMux类型信号的影响。

6. 发明申请

US20100111534A1 SYSTEMS AND METHODS FOR CHANNEL POWER OFFSETS FOR MULTI DATA RATE DWDM TRANSMISSION OVER OPTICAL ADD DROP MULTIPLEXERS 有权
标题翻译：用于通过光学增益多路复用器的多数据速率DWDM传输的通道功率偏移的系统和方法
公开(公告)号：US20100111534A1
公开(公告)日：2010-05-06
申请号：US12262869
申请日：2008-10-31
申请人： John J. VESELKA, JR. , Harshad Sardesai
发明人： John J. VESELKA, JR. , Harshad Sardesai
IPC分类号： H04J14/00
CPC分类号： H04J14/0221 , H04J14/021
摘要： The present disclosure provides systems and methods for channel power offsets for multi-rate dense wave division multiplexed (DWDM) transmission over optical add-drop multiplexers (OADMs). The present invention includes algorithms to set power levels of each type of channel in different sections of a fiber system to optimize the performance of that type of channel at the receiver. For example, the present invention can optimize power levels based on different channel modulation formats, bit rates, channel spacings, and the like. Advantageously, the present invention improves the total capacity (bit rate) and reach that channels of a given bit rate can achieve, and maximizes the reach of channels without sacrificing capacity.
摘要翻译：本公开提供了用于通过光分插复用器（OADM）的多速率密集波分复用（DWDM）传输的信道功率偏移的系统和方法。本发明包括用于设置光纤系统的不同部分中的每种类型的信道的功率电平的算法，以优化接收机处的那种类型的信道的性能。例如，本发明可以基于不同的信道调制格式，比特率，信道间隔等来优化功率电平。有利地，本发明改进了总容量（比特率）并且达到给定比特率可以实现的信道，并且使信道的覆盖范围最大化，而不会牺牲容量。

7. 发明授权

US07333736B2 Method and apparatus for controlling modulator phase alignment in a transmitter of an optical communications system 有权
标题翻译：用于控制光通信系统的发射机中的调制器相位对准的方法和装置
公开(公告)号：US07333736B2
公开(公告)日：2008-02-19
申请号：US10610870
申请日：2003-07-02
申请人： Harshad Sardesai , Steve Sluz
发明人： Harshad Sardesai , Steve Sluz
IPC分类号： H04N10/12
CPC分类号： H04B10/505 , H04B10/50577 , H04B10/508
摘要： A method and apparatus for controlling phase alignment in a modulator of a transmitter in an optical communications system utilizes an RF power signature to tune phase alignment. A portion of the optical signal is tapped and converted to an electrical signal. An electrical band-pass filter and RF detector examines a narrow slice of the RF spectrum and utilize the detected RF power to control phase alignment between the data modulator and pulse carver. Another portion of the optical signal is multiplied by the pulse carver clock, filtered and integrated in order to generate a second phase control signal for controlling the relative phase of a dual arm modulator being used as the pulse carver in one embodiment.
摘要翻译：用于控制光通信系统中的发射机的调制器中的相位对准的方法和装置利用RF功率特征来调整相位对准。光信号的一部分被抽头并转换成电信号。电子带通滤波器和RF检测器检查RF频谱的窄片，并利用检测到的RF功率来控制数据调制器和脉冲编码器之间的相位对准。将光信号的另一部分乘以脉冲雕刻时钟，进行滤波和积分，以便产生第二相位控制信号，用于控制在一个实施例中用作脉冲刻录机的双臂调制器的相对相位。

8. 发明申请

US20050002675A1 Method and apparatus for controlling modulator phase alignment in a transmitter of an optical communications system 有权
标题翻译：用于控制光通信系统的发射机中的调制器相位对准的方法和装置
公开(公告)号：US20050002675A1
公开(公告)日：2005-01-06
申请号：US10610870
申请日：2003-07-02
申请人： Harshad Sardesai , Steve Sluz
发明人： Harshad Sardesai , Steve Sluz
IPC分类号： H04B10/155 , H04B10/04
CPC分类号： H04B10/505 , H04B10/50577 , H04B10/508
摘要： A method and apparatus for controlling phase alignment in a modulator of a transmitter in an optical communications system utilizes an RF power signature to tune phase alignment. A portion of the optical signal is tapped and converted to an electrical signal. An electrical band-pass filter and RF detector examines a narrow slice of the RF spectrum and utilize the detected RF power to control phase alignment between the data modulator and pulse carver. Another portion of the optical signal is multiplied by the pulse carver clock, filtered and integrated in order to generate a second phase control signal for controlling the relative phase of a dual arm modulator being used as the pulse carver in one embodiment.
摘要翻译：用于控制光通信系统中的发射机的调制器中的相位对准的方法和装置利用RF功率特征来调整相位对准。光信号的一部分被抽头并转换成电信号。电子带通滤波器和RF检测器检查RF频谱的窄片，并利用检测到的RF功率来控制数据调制器和脉冲编码器之间的相位对准。将光信号的另一部分乘以脉冲雕刻时钟，进行滤波和积分，以便产生第二相位控制信号，用于控制在一个实施例中用作脉冲刻录机的双臂调制器的相对相位。

9. 发明授权

US07400835B2 WDM system having chromatic dispersion precompensation 有权
标题翻译：具有色散预补偿的WDM系统
公开(公告)号：US07400835B2
公开(公告)日：2008-07-15
申请号：US10231893
申请日：2002-08-30
申请人： Harshad Sardesai , Michael Taylor , Sanjaykumar Upadhyay
发明人： Harshad Sardesai , Michael Taylor , Sanjaykumar Upadhyay
IPC分类号： H04B10/12 , H04B10/00
CPC分类号： H04B10/2525 , H04B2210/254 , H04J14/02
摘要： Chromatic dispersion in a high speed CS-RZ WDM transmission system is reduced by providing tailored “precompensation” for individual and/or groups of optical signals. Such precompensation is achieved by passing the optical signals through a dispersion compensating elements, such as dispersion compensating fiber, within an optical multiplexer, i.e., prior to multiplexing the signals onto a single optical fiber. Additional dispersion compensation can be performed in optical amplifiers and within an optical demultiplexer downstream from the optical multiplexer.
摘要翻译：通过为单个和/或一组光信号提供定制的“预补偿”，降低了高速CS-RZ WDM传输系统中的色散。这种预补偿通过使光信号通过光复用器内的色散补偿元件（例如色散补偿光纤），即在将信号复用到单个光纤之前来实现。可以在光放大器中和在光复用器下游的光解复用器内执行附加的色散补偿。

10. 发明申请

US20070264024A1 Bi-directional application of a dispersion compensating module in a regional system 审中-公开
标题翻译：在区域系统中双向应用色散补偿模块
公开(公告)号：US20070264024A1
公开(公告)日：2007-11-15
申请号：US11414124
申请日：2006-04-28
申请人： Wenxin Zheng , Harshad Sardesai , Jean Archambault , Michael Frankel
发明人： Wenxin Zheng , Harshad Sardesai , Jean Archambault , Michael Frankel
IPC分类号： H04B10/12
CPC分类号： H04B10/25133
摘要： A system for the bidirectional application of a dispersion compensating module in a regional system includes a dispersion compensating module configured to receive a first optical signal traveling along a first path and a second optical signal traveling along a second path, wherein the dispersion compensating module provides dispersion compensation to the first optical signal and the second optical signal. The system also includes a first circulator in optical communication with the dispersion compensating module and the first path, wherein the first circulator delivers the first optical signal to the dispersion compensating module. The system further includes a second circulator in optical communication with the dispersion compensating module and the second path, wherein the second circulator delivers the second optical signal to the dispersion compensating module. The first circulator is further in optical communication with the second path, receives the second optical signal from the dispersion compensating module, and transmits the second optical signal along the second path subsequent to dispersion compensation. The second circulator is further in optical communication with the first path, receives the first optical signal from the dispersion compensating module, and transmits the first optical signal along the first path subsequent to dispersion compensation.
摘要翻译：用于在区域系统中双向应用色散补偿模块的系统包括：色散补偿模块，被配置为接收沿着第一路径行进的第一光信号和沿第二路径行进的第二光信号，其中色散补偿模块提供色散补偿第一光信号和第二光信号。该系统还包括与色散补偿模块和第一路径进行光通信的第一循环器，其中第一循环器将第一光信号传送到色散补偿模块。该系统还包括与色散补偿模块和第二路径光通信的第二循环器，其中第二循环器将第二光信号传送到色散补偿模块。第一循环器进一步与第二路径进行光通信，从色散补偿模块接收第二光信号，并且在色散补偿之后沿着第二路径发送第二光信号。第二循环器进一步与第一路径光通信，从色散补偿模块接收第一光信号，并且在色散补偿之后沿着第一路径发送第一光信号。

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