公开(公告)号：US09577762B2

公开(公告)日：2017-02-21

申请号：US13300956

申请日：2011-11-21

申请人： Gary Mak ,  Mohammad Sotoodeh

发明人： Gary Mak ,  Mohammad Sotoodeh

IPC分类号： H04B17/00 ,  H04B10/564 ,  H04B10/079 ,  H04B10/548

CPC分类号： H04B10/564 ,  H04B10/07953 ,  H04B10/548 ,  H04B2210/07

摘要： A method of controlling a multiple sub-carrier optical channel of an optical communications system. The multiple sub-carrier optical channel includes at least two sub-carriers modulated with respective sub-channel data streams within a spectral range allocated to a single optical channel of the optical communications system. A transmitter modem of the optical communications system applies a respective dither signal to each sub-carrier. A receiver modem of the optical communications system detects a respective quality metric of each sub-carrier. A respective optimum power level of each sub-carrier is estimated based on the applied dither signals and the detected quality metrics. A respective power level of each sub-carrier is then adjusted in accordance with the estimated respective optimum power level of each sub-carrier.

摘要翻译： 一种控制光通信系统的多子载波光信道的方法。 多子载波光信道包括在分配给光通信系统的单个光信道的频谱范围内的各个子信道数据流调制的至少两个子载波。 光通信系统的发射机调制解调器将相应的抖动信号应用于每个子载波。 光通信系统的接收机调制解调器检测每个子载波的相应质量度量。 基于所应用的抖动信号和检测到的质量度量来估计每个子载波的相应的最佳功率电平。 然后根据每个子载波的估计的各个最佳功率电平来调整每个子载波的相应功率电平。

公开(公告)号：US20140308047A1

公开(公告)日：2014-10-16

申请号：US13860827

申请日：2013-04-11

申请人： Gary Mak ,  Yves Beaulieu ,  Mohammad Sotoodeh

发明人： Gary Mak ,  Yves Beaulieu ,  Mohammad Sotoodeh

IPC分类号： G02F1/01

CPC分类号： H04B10/548 ,  G02F1/0123 ,  G02F1/2255 ,  H04B10/5055 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/532 ,  H04B10/541 ,  H04B10/5561

摘要： A modulator bias selection method, a coherent optical transmitter, and optical modulator solve the problem of generating a correct constellation using the bias points with the minimum phase adjustment range. The optimum modulator bias systems and methods include a coherent optical transmitter with control of four (XI, XQ, YI, YQ) quadrature data signals via a transmitter (Tx) application specific integrated circuit (ASIC), with a modulator bias controller which implements an algorithm to find the optimum bias points. The optimum bias points yield a correct constellation with minimum phase/bias adjustment. An algorithm is used to find the optimum bias solution using fast, simple method, adjusting only one quadrature at a time and exploiting a control feature of the Tx ASIC. This algorithm is significantly simpler than a generalized search, is a local algorithm, and uses only DC power measurement at the transmitter.

摘要翻译： 调制器偏置选择方法，相干光发射机和光调制器使用具有最小相位调整范围的偏置点来解决产生正确星座的问题。 最佳调制器偏置系统和方法包括通过发射机（Tx）专用集成电路（ASIC）控制四个​​（XI，XQ，YI，YQ）正交数据信号的相干光发射机，具有调制器偏置控制器，其实现 算法找到最佳偏好点。 最佳偏置点产生具有最小相位/偏置调整的正确星座。 使用一种算法来使用快速，简单的方法找到最佳的偏置解决方案，一次调整一个正交，并利用Tx ASIC的控制特性。 该算法比广义搜索要简单得多，是局部算法，仅在发射机上使用直流功率测量。

公开(公告)号：US20130129348A1

公开(公告)日：2013-05-23

申请号：US13300956

申请日：2011-11-21

申请人： Gary MAK ,  Mohammad SOTOODEH

发明人： Gary MAK ,  Mohammad SOTOODEH

IPC分类号： H04B10/08

CPC分类号： H04B10/564 ,  H04B10/07953 ,  H04B10/548 ,  H04B2210/07

摘要： A method of controlling a multiple sub-carrier optical channel of an optical communications system. The multiple sub-carrier optical channel includes at least two sub-carriers modulated with respective sub-channel data streams within a spectral range allocated to a single optical channel of the optical communications system. A transmitter modem of the optical communications system applies a respective dither signal to each sub-carrier. A receiver modem of the optical communications system detects a respective quality metric of each sub-carrier. A respective optimum power level of each sub-carrier is estimated based on the applied dither signals and the detected quality metrics. A respective power level of each sub-carrier is then adjusted in accordance with the estimated respective optimum power level of each sub-carrier.

摘要翻译： 一种控制光通信系统的多子载波光信道的方法。 多子载波光信道包括在分配给光通信系统的单个光信道的频谱范围内的各个子信道数据流调制的至少两个子载波。 光通信系统的发射机调制解调器将相应的抖动信号应用于每个子载波。 光通信系统的接收机调制解调器检测每个子载波的相应质量度量。 基于所应用的抖动信号和检测到的质量度量来估计每个子载波的相应的最佳功率电平。 然后根据每个子载波的估计的各个最佳功率电平来调整每个子载波的相应功率电平。

公开(公告)号：US08059970B2

公开(公告)日：2011-11-15

申请号：US12830663

申请日：2010-07-06

申请人： James Harley ,  Douglas McGhan ,  Mohammad Sotoodeh ,  Anant Grewal ,  Mark Hawryluck

发明人： James Harley ,  Douglas McGhan ,  Mohammad Sotoodeh ,  Anant Grewal ,  Mark Hawryluck

IPC分类号： H04B10/00

CPC分类号： H04B10/58 ,  H04B10/5053 ,  H04B10/5055 ,  H04B10/50572 ,  H04B10/50575

摘要： A method of controlling a polar optical transmitter comprising a dual-branch Mach-Zehnder (MZ) modulator driven by a pair of independent electrical drive signals. A cost function is provided which defines a relationship between a control parameter of the optical transmitter and a power level of an output optical signal generated by the MZ modulator. A selected component of the electrical drive signals is dithered using a predetermined dither signal. A modulation depth of the output optical signal power level corresponding to the dither signal is detected, and the control parameter adjusted based on the cost function and the detection result.

摘要翻译： 一种控制极光学发射机的方法，包括由一对独立电驱动信号驱动的双分支马赫 - 曾德（MZ）调制器。 提供了一种成本函数，其定义了光发射机的控制参数与由MZ调制器产生的输出光信号的功率电平之间的关系。 电驱动信号的选定分量使用预定的抖动信号进行抖动。 检测与抖动信号对应的输出光信号功率电平的调制深度，并根据成本函数和检测结果调整控制参数。

公开(公告)号：US07787778B2

公开(公告)日：2010-08-31

申请号：US11067011

申请日：2005-02-28

申请人： James Harley ,  Douglas McGhan ,  Mohammad Sotoodeh ,  Anant Grewal ,  Mark Hawryluck

发明人： James Harley ,  Douglas McGhan ,  Mohammad Sotoodeh ,  Anant Grewal ,  Mark Hawryluck

IPC分类号： H04B10/00

CPC分类号： H04B10/58 ,  H04B10/5053 ,  H04B10/5055 ,  H04B10/50572 ,  H04B10/50575

摘要： A method of controlling a polar optical transmitter comprising a dual-branch Mach-Zehnder (MZ) modulator driven by a pair of independent electrical drive signals. A cost function is provided which defines a relationship between a control parameter of the optical transmitter and a power level of an output optical signal generated by the MZ modulator. A selected component of the electrical drive signals is dithered using a predetermined dither signal. A modulation depth of the output optical signal power level corresponding to the dither signal is detected, and the control parameter adjusted based on the cost function and the detection result.

摘要翻译： 一种控制极光学发射机的方法，包括由一对独立电驱动信号驱动的双分支马赫 - 曾德（MZ）调制器。 提供了一种成本函数，其定义了光发射机的控制参数与由MZ调制器产生的输出光信号的功率电平之间的关系。 电驱动信号的选定分量使用预定的抖动信号进行抖动。 检测与抖动信号对应的输出光信号功率电平的调制深度，并根据成本函数和检测结果调整控制参数。

公开(公告)号：US09124364B1

公开(公告)日：2015-09-01

申请号：US13483622

申请日：2012-05-30

申请人： Mohammad Sotoodeh ,  Gary Mak ,  Yves Beaulieu

发明人： Mohammad Sotoodeh ,  Gary Mak ,  Yves Beaulieu

IPC分类号： H04B10/079 ,  H04B10/50

CPC分类号： H04B10/0799 ,  H04B10/50577 ,  H04B10/5561

摘要： A method of controlling an optical transmitter having a Dual Parallel Mach-Zehnder (DPMZ) modulator. An I-Q power balance between respective branches of the DPMZ modulator is detected, and at least one parameter of the DPMZ modulator is adjusted to drive the I-Q power balance to a predetermined target value. An optical transmitter may have Quad Parallel Mach-Zehnder (QPMZ) modulator having a pair of parallel DPMZ modulators for modulating respective X- and Y-polarization lights. In such cases, an X-Y power imbalance between the two polarization lights is detected, and at least one parameter of the QPMZ modulator is adjusted to drive the X-Y power imbalance to a predetermined value.

摘要翻译： 一种控制具有双平行马赫曾德（DPMZ）调制器的光发射机的方法。 检测到DPMZ调制器的各个分支之间的I-Q功率平衡，并且调整DPMZ调制器的至少一个参数以将I-Q功率平衡驱动到预定的目标值。 光发射机可以具有用于调制相应的X和Y偏振光的具有一对并行DPMZ调制器的Quad Parallel Mach-Zehnder（QPMZ）调制器。 在这种情况下，检测到两个偏振光之间的X-Y功率不平衡，并且调整QPMZ调制器的至少一个参数以将X-Y功率不平衡驱动到预定值。

公开(公告)号：US09059805B2

公开(公告)日：2015-06-16

申请号：US13860827

申请日：2013-04-11

申请人： Gary Mak ,  Yves Beaulieu ,  Mohammad Sotoodeh

发明人： Gary Mak ,  Yves Beaulieu ,  Mohammad Sotoodeh

IPC分类号： H04B10/50 ,  H04B10/54 ,  H04B10/556

CPC分类号： H04B10/548 ,  G02F1/0123 ,  G02F1/2255 ,  H04B10/5055 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/532 ,  H04B10/541 ,  H04B10/5561

摘要： A modulator bias selection method, a coherent optical transmitter, and optical modulator solve the problem of generating a correct constellation using the bias points with the minimum phase adjustment range. The optimum modulator bias systems and methods include a coherent optical transmitter with control of four (XI, XQ, YI, YQ) quadrature data signals via a transmitter (Tx) application specific integrated circuit (ASIC), with a modulator bias controller which implements an algorithm to find the optimum bias points. The optimum bias points yield a correct constellation with minimum phase/bias adjustment. An algorithm is used to find the optimum bias solution using fast, simple method, adjusting only one quadrature at a time and exploiting a control feature of the Tx ASIC. This algorithm is significantly simpler than a generalized search, is a local algorithm, and uses only DC power measurement at the transmitter.

摘要翻译： 调制器偏置选择方法，相干光发射机和光调制器使用具有最小相位调整范围的偏置点来解决产生正确星座的问题。 最佳调制器偏置系统和方法包括通过发射机（Tx）专用集成电路（ASIC）控制四个​​（XI，XQ，YI，YQ）正交数据信号的相干光发射机，具有调制器偏置控制器，其实现 算法找到最佳偏好点。 最佳偏置点产生具有最小相位/偏置调整的正确星座。 使用一种算法来使用快速，简单的方法找到最佳的偏置解决方案，一次调整一个正交，并利用Tx ASIC的控制特性。 该算法比广义搜索要简单得多，是局部算法，仅在发射机上使用直流功率测量。

公开(公告)号：US20100272446A1

公开(公告)日：2010-10-28

申请号：US12830663

申请日：2010-07-06

申请人： James Harley ,  Douglas McGhan ,  Mohammad Sotoodeh ,  Anant Grewal ,  Mark Hawryluck

发明人： James Harley ,  Douglas McGhan ,  Mohammad Sotoodeh ,  Anant Grewal ,  Mark Hawryluck

IPC分类号： H04B10/04

CPC分类号： H04B10/58 ,  H04B10/5053 ,  H04B10/5055 ,  H04B10/50572 ,  H04B10/50575

摘要： A method of controlling a polar optical transmitter comprising a dual-branch Mach-Zehnder (MZ) modulator driven by a pair of independent electrical drive signals. A cost function is provided which defines a relationship between a control parameter of the optical transmitter and a power level of an output optical signal generated by the MZ modulator. A selected component of the electrical drive signals is dithered using a predetermined dither signal. A modulation depth of the output optical signal power level corresponding to the dither signal is detected, and the control parameter adjusted based on the cost function and the detection result.

摘要翻译： 一种控制极光学发射机的方法，包括由一对独立电驱动信号驱动的双分支马赫 - 曾德（MZ）调制器。 提供了一种成本函数，其定义了光发射机的控制参数与由MZ调制器产生的输出光信号的功率电平之间的关系。 电驱动信号的选定分量使用预定的抖动信号进行抖动。 检测与抖动信号对应的输出光信号功率电平的调制深度，并根据成本函数和检测结果调整控制参数。

公开(公告)号：US20060127104A1

公开(公告)日：2006-06-15

申请号：US11067011

申请日：2005-02-28

申请人： James Harley ,  Douglas McGhan ,  Mohammad Sotoodeh ,  Anant Grewal ,  Mark Hawryluck

发明人： James Harley ,  Douglas McGhan ,  Mohammad Sotoodeh ,  Anant Grewal ,  Mark Hawryluck

IPC分类号： H04B10/04

CPC分类号： H04B10/58 ,  H04B10/5053 ,  H04B10/5055 ,  H04B10/50572 ,  H04B10/50575

摘要： A method of controlling a polar optical transmitter comprising a dual-branch Mach-Zehnder (MZ) modulator driven by a pair of independent electrical drive signals. A cost function is provided which defines a relationship between a control parameter of the optical transmitter and a power level of an output optical signal generated by the MZ modulator. A selected component of the electrical drive signals is dithered using a predetermined dither signal. A modulation depth of the output optical signal power level corresponding to the dither signal is detected, and the control parameter adjusted based on the cost function and the detection result.

摘要翻译： 一种控制极光学发射机的方法，包括由一对独立电驱动信号驱动的双分支马赫 - 曾德（MZ）调制器。 提供了一种成本函数，其定义了光发射机的控制参数与由MZ调制器产生的输出光信号的功率电平之间的关系。 电驱动信号的选定分量使用预定的抖动信号进行抖动。 检测与抖动信号对应的输出光信号功率电平的调制深度，并根据成本函数和检测结果调整控制参数。