公开(公告)号：US08948609B2

公开(公告)日：2015-02-03

申请号：US13404471

申请日：2012-02-24

申请人： James Whiteaway ,  Thomas Duthel ,  Jonas Geyer

发明人： James Whiteaway ,  Thomas Duthel ,  Jonas Geyer

IPC分类号： H04B10/12

CPC分类号： H04B10/541 ,  H04L27/3411 ,  H04L27/364 ,  H04L27/368

摘要： According to a first aspect, techniques are provided to optimize a Mach-Zehnder modulator drive waveform by distorting the outer modulation levels of the waveform, thereby equalizing eye openings of the received optical field, and in particular creating a wider and more defined central eye opening of the received optical field. According to a second aspect, techniques are provided to adjust in-phase (I) modulation levels based on the imperfect performance of a Mach-Zehnder modulator allocated to modulate quadrature-phase (Q) modulation levels, and conversely to adjust the Q modulation levels based on the imperfect performance of an MZ modulator allocated to modulate I modulation levels.

摘要翻译： 根据第一方面，提供了通过使波形的外部调制级别失真来优化马赫 - 曾德调制器驱动波形的技术，从而均衡所接收的光学场的眼睛开口，并且特别地产生更宽和更加限定的中心眼睛开口 的接收光场。 根据第二方面，提供了用于基于分配给调制正交相位（Q）调制电平的马赫 - 曾德调制器的不完美性能来调整同相（I）调制电平的技术，并且相反地调整Q调制电平 基于分配给调制I调制电平的MZ调制器的不完美性能。

公开(公告)号：US20130223849A1

公开(公告)日：2013-08-29

申请号：US13404471

申请日：2012-02-24

申请人： James Whiteaway ,  Thomas Duthel ,  Jonas Geyer

发明人： James Whiteaway ,  Thomas Duthel ,  Jonas Geyer

IPC分类号： H04B10/12 ,  H04B10/04

CPC分类号： H04B10/541 ,  H04L27/3411 ,  H04L27/364 ,  H04L27/368

摘要： According to a first aspect, techniques are provided to optimize a Mach-Zehnder modulator drive waveform by distorting the outer modulation levels of the waveform, thereby equalizing eye openings of the received optical field, and in particular creating a wider and more defined central eye opening of the received optical field. According to a second aspect, techniques are provided to adjust in-phase (I) modulation levels based on the imperfect performance of a Mach-Zehnder modulator allocated to modulate quadrature-phase (Q) modulation levels, and conversely to adjust the Q modulation levels based on the imperfect performance of an MZ modulator allocated to modulate I modulation levels.

摘要翻译： 根据第一方面，提供了通过使波形的外部调制级别失真来优化马赫 - 曾德调制器驱动波形的技术，从而均衡所接收的光学场的眼睛开口，并且特别地产生更宽和更加限定的中心眼睛开口 的接收光场。 根据第二方面，提供了用于基于分配给调制正交相位（Q）调制电平的马赫 - 曾德调制器的不完美性能来调整同相（I）调制电平的技术，并且相反地调整Q调制电平 基于分配给调制I调制电平的MZ调制器的不完美性能。

公开(公告)号：US09197327B2

公开(公告)日：2015-11-24

申请号：US13602682

申请日：2012-09-04

申请人： Jonas Geyer ,  Thomas Duthel

发明人： Jonas Geyer ,  Thomas Duthel

IPC分类号： H04B10/04 ,  H04B10/516 ,  H04L25/05

CPC分类号： H04B10/516 ,  H04L25/05

摘要： An optical transmitter may include a sample rate converter and a digital-to-analog converter operable to convert an inputted digital electrical signal to an analog optical signal. The signal converter may include a first interface operable to receive a digital electrical signal that may include a block of input data having N symbols in a time domain. The signal converter may also include: a first module operable to transform, via a Fourier Transform, the input data having N symbols from the time domain to a frequency domain; a second module operable to up-sample the N frequency domain samples so that there are 1.6N, 2N, or 2.67N frequency domain samples, for example; and then a third module operable to transform, via an inverse Fourier Transform, the 1.6N, 2N, or 2.67N frequency domain samples to an equivalent number of time domain samples at 1.6, 2.0, or 2.67 samples per symbol, respectively.

摘要翻译： 光发射机可以包括采样率转换器和可操作以将输入的数字电信号转换为模拟光信号的数模转换器。 信号转换器可以包括可操作以接收数字电信号的第一接口，该数字电信号可以包括在时域中具有N个符号的输入数据块。 信号转换器还可以包括：第一模块，其可操作以经由傅里叶变换将具有N个符号的输入数据从时域转换为频域; 第二模块，其可操作以对N个频域样本进行上采样，使得例如具有1.6N，2N或2.67N频域采样; 然后第三模块可操作以分别经由逆傅里叶变换将1.6N，2N或2.67N频域采样转换为等效数量的时域采样，每个符号为1.6,2.0或2.67个样本。

公开(公告)号：US09124363B2

公开(公告)日：2015-09-01

申请号：US13487346

申请日：2012-06-04

申请人： Jonas Geyer ,  Thomas Duthel

发明人： Jonas Geyer ,  Thomas Duthel

IPC分类号： H04B17/00 ,  H04B10/079

CPC分类号： H04B10/07957

摘要： Techniques are provided to estimate a distance of one received optical subchannel to one or both of its neighbor (adjacent) subchannels. An optical field comprised of a plurality of subchannels of optical signals at respective wavelengths is received on an optical fiber. Using coherent optical reception in conjunction with analog-to-digital conversion, the received optical field is converted to digital complex valued data. The digital complex valued data is transformed to the frequency domain to produce spectrum data. Using either a peak method or a gap method, a distance or spacing is computed between a subchannel of interest among the plurality of subchannels and at least one neighbor subchannel based on the spectrum data.

摘要翻译： 提供技术来估计一个接收到的光子信道到其相邻（相邻）子信道中的一个或两个的距离。 在光纤上接收由各个波长的光信号的多个子信道组成的光场。 结合模数转换使用相干光接收，接收到的光场被转换成数字复值数据。 将数字复数值数据转换为频域以产生频谱数据。 使用峰值方法或间隙方法，基于频谱数据在多个子信道中的感兴趣的子信道和至少一个相邻子信道之间计算距离或间隔。

公开(公告)号：US20140064743A1

公开(公告)日：2014-03-06

申请号：US13602682

申请日：2012-09-04

申请人： Jonas Geyer ,  Thomas Duthel

发明人： Jonas Geyer ,  Thomas Duthel

IPC分类号： H04B10/04

CPC分类号： H04B10/516 ,  H04L25/05

摘要： An optical transmitter may include a sample rate converter and a digital-to-analog converter operable to convert an inputted digital electrical signal to an analog optical signal. The signal converter may include a first interface operable to receive a digital electrical signal that may include a block of input data having N symbols in a time domain. The signal converter may also include: a first module operable to transform, via a Fourier Transform, the input data having N symbols from the time domain to a frequency domain; a second module operable to up-sample the N frequency domain samples so that there are 1.6N, 2N, or 2.67N frequency domain samples, for example; and then a third module operable to transform, via an inverse Fourier Transform, the 1.6N, 2N, or 2.67N frequency domain samples to an equivalent number of time domain samples at 1.6, 2.0, or 2.67 samples per symbol, respectively.

摘要翻译： 光发射机可以包括采样率转换器和可操作以将输入的数字电信号转换为模拟光信号的数模转换器。 信号转换器可以包括可操作以接收数字电信号的第一接口，该数字电信号可以包括在时域中具有N个符号的输入数据块。 信号转换器还可以包括：第一模块，其可操作以经由傅里叶变换将具有N个符号的输入数据从时域转换为频域; 第二模块，其可操作以对N个频域样本进行上采样，使得例如具有1.6N，2N或2.67N频域采样; 然后第三模块可操作以分别经由逆傅里叶变换将1.6N，2N或2.67N频域采样转换为等效数量的时域采样，每个符号为1.6,2.0或2.67个样本。

公开(公告)号：US20130322877A1

公开(公告)日：2013-12-05

申请号：US13487346

申请日：2012-06-04

申请人： Jonas Geyer ,  Thomas Duthel

发明人： Jonas Geyer ,  Thomas Duthel

IPC分类号： H04B10/08

CPC分类号： H04B10/07957

摘要： Techniques are provided to estimate a distance of one received optical subchannel to one or both of its neighbor (adjacent) subchannels. An optical field comprised of a plurality of subchannels of optical signals at respective wavelengths is received on an optical fiber. Using coherent optical reception in conjunction with analog-to-digital conversion, the received optical field is converted to digital complex valued data. The digital complex valued data is transformed to the frequency domain to produce spectrum data. Using either a peak method or a gap method, a distance or spacing is computed between a subchannel of interest among the plurality of subchannels and at least one neighbor subchannel based on the spectrum data.

摘要翻译： 提供技术来估计一个接收到的光子信道到其相邻（相邻）子信道中的一个或两个的距离。 在光纤上接收由各个波长的光信号的多个子信道组成的光场。 结合模数转换使用相干光接收，接收到的光场被转换成数字复值数据。 将数字复数值数据转换为频域以产生频谱数据。 使用峰值方法或间隙方法，基于频谱数据在多个子信道中的感兴趣的子信道和至少一个相邻子信道之间计算距离或间隔。

公开(公告)号：US20130045004A1

公开(公告)日：2013-02-21

申请号：US13210458

申请日：2011-08-16

申请人： Jonas Geyer

发明人： Jonas Geyer

IPC分类号： H04B10/08

CPC分类号： H04B10/6161 ,  H04B10/25133

摘要： Techniques are provided for estimation of the chromatic dispersion (CD) in an optical signal received by an optical receiver. The techniques involve iteratively adjusting dispersion compensation coefficients of one or more filters configured to compensate for the CD in the received optical signal. At each iteration of the dispersion compensation coefficient adjustment, electrical domain signals are filtered to generate digitally-filtered signals. The electrical domain signals are generated based on the received optical signal. Also at each iteration of the dispersion compensation coefficient adjustment, an amplitude histogram of the digitally-filtered signals is generated. The amplitude histograms generated at each iteration are evaluated to generate an estimate of the chromatic dispersion in the received optical signal.

摘要翻译： 提供了用于估计由光接收器接收的光信号中的色散（CD）的技术。 这些技术涉及迭代地调整配置成补偿接收的光信号中的CD的一个或多个滤波器的色散补偿系数。 在色散补偿系数调整的每次迭代中，电域信号被滤波以产生经数字滤波的信号。 基于所接收的光信号产生电域信号。 同样在色散补偿系数调整的每次迭代中，产生经数字滤波的信号的振幅直方图。 评估在每次迭代时产生的幅度直方图以产生所接收的光信号中的色散的估计。

公开(公告)号：US08886058B2

公开(公告)日：2014-11-11

申请号：US13487350

申请日：2012-06-04

申请人： Jonas Geyer ,  Andreas Bisplinghoff ,  Theodor Kupfer

发明人： Jonas Geyer ,  Andreas Bisplinghoff ,  Theodor Kupfer

IPC分类号： H04B10/06

CPC分类号： H04B10/6165

摘要： Carrier phase estimation techniques are provided for processing a received optical signal having a carrier modulated according to a modulation scheme. First and second carrier phase estimation operations are performed on a digital signal derived from an optical carrier obtained from the received optical signal using coherent optical reception. The first carrier phase estimation operation tracks relatively fast phase variations of the optical carrier of the received optical signal to produce a first carrier phase estimation and the second carrier phase estimation operation tracks relatively slow phase variations of the optical carrier of the received optical signal to produce a second carrier phase estimation. A difference between the first and second carrier phase estimations is computed. Occurrence of a cycle slip is determined when the difference is greater than a threshold. A correction is applied to the first carrier phase estimation when the low pass filtered difference exceeds the threshold.

摘要翻译： 提供载波相位估计技术来处理具有根据调制方案调制的载波的接收光信号。 对从使用相干光接收的接收光信号获得的光载波导出的数字信号执行第一和第二载波相位估计操作。 第一载波相位估计操作跟踪所接收的光信号的光载波的相对较快的相位变化，以产生第一载波相位估计，并且第二载波相位估计操作跟踪所接收的光信号的光载波的相对慢的相位变化，以产生 第二载波相位估计。 计算第一和第二载波相位估计之间的差异。 当差值大于阈值时，确定周期滑移的发生。 当低通滤波差异超过阈值时，对第一载波相位估计应用校正。

公开(公告)号：US20130322870A1

公开(公告)日：2013-12-05

申请号：US13487350

申请日：2012-06-04

申请人： Jonas Geyer ,  Andreas Bisplinghoff ,  Theodor Kupfer

发明人： Jonas Geyer ,  Andreas Bisplinghoff ,  Theodor Kupfer

IPC分类号： H04B10/08

CPC分类号： H04B10/6165

摘要： Carrier phase estimation techniques are provided for processing a received optical signal having a carrier modulated according to a modulation scheme. First and second carrier phase estimation operations are performed on a digital signal derived from an optical carrier obtained from the received optical signal using coherent optical reception. The first carrier phase estimation operation tracks relatively fast phase variations of the optical carrier of the received optical signal to produce a first carrier phase estimation and the second carrier phase estimation operation tracks relatively slow phase variations of the optical carrier of the received optical signal to produce a second carrier phase estimation. A difference between the first and second carrier phase estimations is computed. Occurrence of a cycle slip is determined when the difference is greater than a threshold. A correction is applied to the first carrier phase estimation when the low pass filtered difference exceeds the threshold.

摘要翻译： 提供载波相位估计技术来处理具有根据调制方案调制的载波的接收光信号。 对从使用相干光接收的接收光信号获得的光载波导出的数字信号执行第一和第二载波相位估计操作。 第一载波相位估计操作跟踪所接收的光信号的光载波的相对快的相位变化，以产生第一载波相位估计，并且第二载波相位估计操作跟踪所接收的光信号的光载波的相对慢的相位变化，以产生 第二载波相位估计。 计算第一和第二载波相位估计之间的差异。 当差值大于阈值时，确定周期滑移的发生。 当低通滤波差异超过阈值时，对第一载波相位估计应用校正。

公开(公告)号：US08750726B2

公开(公告)日：2014-06-10

申请号：US13210458

申请日：2011-08-16

申请人： Jonas Geyer

发明人： Jonas Geyer

IPC分类号： H04B10/06

CPC分类号： H04B10/6161 ,  H04B10/25133

摘要： Techniques are provided for estimation of the chromatic dispersion (CD) in an optical signal received by an optical receiver. The techniques involve iteratively adjusting dispersion compensation coefficients of one or more filters configured to compensate for the CD in the received optical signal. At each iteration of the dispersion compensation coefficient adjustment, electrical domain signals are filtered to generate digitally-filtered signals. The electrical domain signals are generated based on the received optical signal. Also at each iteration of the dispersion compensation coefficient adjustment, an amplitude histogram of the digitally-filtered signals is generated. The amplitude histograms generated at each iteration are evaluated to generate an estimate of the chromatic dispersion in the received optical signal.

摘要翻译： 提供了用于估计由光接收器接收的光信号中的色散（CD）的技术。 这些技术涉及迭代地调整配置成补偿接收的光信号中的CD的一个或多个滤波器的色散补偿系数。 在色散补偿系数调整的每次迭代中，电域信号被滤波以产生经数字滤波的信号。 基于所接收的光信号产生电域信号。 同样在色散补偿系数调整的每次迭代中，产生经数字滤波的信号的振幅直方图。 评估在每次迭代时产生的幅度直方图以产生所接收的光信号中的色散的估计。