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公开(公告)号：US07787778B2
公开(公告)日：2010-08-31
申请号：US11067011
申请日：2005-02-28
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。
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公开(公告)号：US06580498B1
公开(公告)日：2003-06-17
申请号：US09773707
申请日：2001-02-02
申请人： James Harley
发明人： James Harley
IPC分类号： G01N2100
CPC分类号： H04B10/07955 , H04B10/077 , H04J14/0227 , H04J14/0241 , H04J14/0278
摘要： The present invention provides an apparatus and method of detecting, on a per wavelength basis, optical return loss at the output of an optical circuit pack. The optical circuit pack can be, for example, an optical amplifier. At an output port and reflected port of the optical circuit pack apparatus for detecting signals is connected. The output power and reflected power are measured, and the optical return loss is calculated. The return loss may be calculated for signals on one or more wavelength channels.
摘要翻译： 本发明提供了一种在每个波长的基础上检测光电路板的输出处的光回波损耗的装置和方法。 光电路板可以是例如光放大器。 在用于检测信号的光电路装置的输出端口和反射端口被连接。 测量输出功率和反射功率，计算光回波损耗。 可以针对一个或多个波长信道上的信号计算回波损耗。
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43.发明授权公开(公告)号：US08180228B1
公开(公告)日：2012-05-15
申请号：US12273597
申请日：2008-11-19
申请人： James Harley , Chuandong Li
发明人： James Harley , Chuandong Li
IPC分类号： H04B10/06
CPC分类号： H04B10/697 , H04L7/0004 , H04L7/0062 , H04L25/03178 , H04L25/03292 , H04L27/02
摘要： In a direct-detection receiver having an analog-to-digital converter (ADC) for sampling a received optical signal and a sequence estimator for recovering data symbols from a multi-bit sample stream generated by the ADC, a method of acquiring a channel lock condition of a clock recovery block of the receiver. A plurality of sets of channel statistics are provided. Each set of channel statistics optimizes performance of the sequence estimator for a respective predetermined combination of channel chromatic dispersion and polarization mode dispersion. At least one set of channel statistics will, when installed in the sequence estimator, yield symbol estimates having residual distortions that are within an acquisition range of the clock recovery block. During start-up of the receiver, one of the sets of channel statistics is selected and installed in the Sequence Estimator. If a channel lock condition is not detected within a predetermined time interval, the step of selecting one of the sets of channel statistics and installing the selected set of channel statistics in the Sequence Estimator is repeated until a channel lock condition is detected.
摘要翻译： 在具有用于对接收到的光信号进行采样的模数转换器（ADC）的直接检测接收机和用于从由ADC产生的多位采样流中恢复数据符号的序列估计器的方法中，获取通道锁 接收机的时钟恢复块的状态。 提供多组信道统计。 每组信道统计优化针对信道色散和偏振模色散的相应预定组合的序列估计器的性能。 当安装在序列估计器中时，至少一组信道统计将产生具有在时钟恢复块的采集范围内的残余失真的符号估计。 在接收机启动过程中，选择频道统计信息之一并将其安装在序列估计器中。 如果在预定时间间隔内没有检测到通道锁定条件，则重复在序列估计器中选择信道统计信息集合和安装所选择的一组信道统计信息的步骤，直到检测到信道锁定状态。
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公开(公告)号：US20100272446A1
公开(公告)日：2010-10-28
申请号：US12830663
申请日：2010-07-06
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。
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公开(公告)号：US07809017B2
公开(公告)日：2010-10-05
申请号：US11533932
申请日：2006-09-21
申请人： James Harley , Ronald J. Gagnon
发明人： James Harley , Ronald J. Gagnon
CPC分类号： H04B10/27 , H04J3/07 , H04J3/1652
摘要： Bit-transparent muxing of an input signal for transport through an optical communications network is provided. A fixed length container of the optical communications network is defined, which includes an overhead and a payload. A stuffing ratio (α) is based on a line rate of the input signal and a data rate of the container. A number (NFS) of fixed stuffs is computed based on the stuffing ratio (α). The input signal and NFS fixed stuffs are inserted into the payload of the container, and the computed number NFS stored in the container's overhead.
摘要翻译： 提供了用于通过光通信网络传输的输入信号的位透明复用。 定义光通信网络的固定长度容器，其包括开销和有效载荷。 填充比（α）基于输入信号的线路速率和容器的数据速率。 基于填充比（α）计算固定材料的数量（NFS）。 输入信号和NFS固定的东西插入到容器的有效载荷中，并将计算出的数量NFS存储在容器的开销中。
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46.发明申请公开(公告)号：US20090304391A1
公开(公告)日：2009-12-10
申请号：US12330691
申请日：2008-12-09
申请人： James Harley , Kim Roberts , Chuandong Li
发明人： James Harley , Kim Roberts , Chuandong Li
IPC分类号： H04B10/12
CPC分类号： H04B10/532 , H04B10/25137 , H04B10/6972 , H04B2210/252 , H04B2210/254
摘要： Described are an optical communications system and a method that allow for compensation of chromatic dispersion and polarization mode dispersion imparted to a communications signal propagating through an optical link. The system is based on a cost-effective optical transport architecture that accommodates baud rates exceeding 15 Gbaud and eliminates the need for costly optical dispersion compensators. Compensation for polarization mode dispersion is performed at the receiver using nonlinear processing. Advantageously, direct detection modulation using inexpensive electro-optic system components can be used in place of more costly and complex coherent and differential modulation formats. Digital filtering can be performed at the transmitter and the input signal can be inverted based on the nonlinearity of the transmitter electro-optic components. Consequently, the bandwidth and linearity requirements for the transmitter electro-optic components are relaxed, and cost reductions are realized.
摘要翻译： 描述了允许对通过光链路传播的通信信号赋予色散和偏振模色散的补偿的光通信系统和方法。 该系统基于具有成本效益的光学传输架构，其适应波特率超过15Gbaud，并且不需要昂贵的光学色散补偿器。 使用非线性处理在接收机处执行偏振模色散的补偿。 有利地，可以使用廉价的电光系统组件的直接检测调制来代替更昂贵和复杂的相干和差分调制格式。 可以在发射机处执行数字滤波，并且可以基于发射机电光部件的非线性来反转输入信号。 因此，放大了发射机电光元件的带宽和线性要求，并实现成本降低。
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公开(公告)号：US07266306B1
公开(公告)日：2007-09-04
申请号：US10677276
申请日：2003-10-03
申请人： James Harley , Kim Roberts
发明人： James Harley , Kim Roberts
IPC分类号： H04B10/04
CPC分类号： H04B10/5165 , H04B10/505 , H04B10/5053 , H04B10/50575 , H04B10/50577
摘要： A suppressed carrier optical communications signal is generated by driving (biasing) an optical modulator capable of complex modulation of an optical carrier signal to a bias point near a zero-crossing point of the modulator's E-field response. A complex input signal is then used to drive excursions of the E-field response to impress the input signal onto the optical carrier. The resulting lightwave emerging from the complex modulator exhibits an optical spectrum characterized by a pair of sidebands and a strongly suppressed carrier. Bias control of the complex modulator is implemented on the basis of the optical power detected at the output of the complex modulator. This enables the optical modulator to be treated as a “black box”, in that calculation of the bias signals does not relay on knowledge of the precise performance characteristics of the modulator.
摘要翻译： 通过驱动（偏置）能够将光载波信号复调制的光调制器驱动（偏置）到调制器的E场响应的过零点附近的偏置点来产生抑制的载波光通信信号。 然后使用复数输入信号来驱动电场响应的偏移，以将输入信号压入光载体上。 从复合调制器出现的所得光波表现出以一对边带和强抑制载体为特征的光谱。 基于在复调制器的输出处检测到的光功率来实现复调制器的偏置控制。 这使得光调制器被视为“黑匣子”，因为偏置信号的计算不会对对调制器的精确性能特性的了解而继续进行。
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48.发明授权Optical waveform for use in a DWDM optical network and systems for generating and processing same 有权用于DWDM光网络的光波形及其生成和处理系统公开(公告)号：US07197243B1
公开(公告)日：2007-03-27
申请号：US09539706
申请日：2000-03-31
申请人： James Harley , Lacra Pavel
发明人： James Harley , Lacra Pavel
IPC分类号： H04B10/08
CPC分类号： H04B10/07955 , H04B10/077 , H04J14/02 , H04J14/0298 , H04L5/02 , H04L27/10
摘要： An optical signal occupying one or more wavelengths. An optical data signal on each wavelength is modulated with a respective overhead (dither) signal, resulting in a respective dithered optical signal. The amplitude of a particular overhead signal used to modulate the corresponding optical data signal is chosen so that the RMS value of the overhead signal in the dithered optical signal is proportional to the average intensity of the optical data signal. The instantaneous frequency of each overhead signal is time-varying and each possible frequency belongs to a distinct set of frequencies which are all harmonically related to a fundamental frequency. The distinctness of each set of frequencies allows each overhead signal to be uniquely isolated from an aggregate overhead signal. The harmonic relationship among the frequencies allows improved accuracy of RMS detection at a receiver as well as reduced computational complexity, as each possible frequency for each overhead signal can be made to fall at the center of one of the frequency bins of a single FFT of reasonable size performed at a receiver. Methods and systems for generating and detecting such signals are disclosed.
摘要翻译： 占据一个或多个波长的光信号。 每个波长上的光学数据信号用相应的开销（抖动）信号进行调制，产生相应的抖动光信号。 选择用于调制对应的光数据信号的特定开销信号的振幅，使得抖动光信号中的开销信号的RMS值与光数据信号的平均强度成比例。 每个开销信号的瞬时频率是时变的，并且每个可能的频率属于与基频谐波相关的一组不同的频率。 每组频率的独特性允许每个开销信号与聚合开销信号唯一隔离。 频率之间的谐波关系允许提高接收机RMS检测的精度以及降低的计算复杂度，因为每个开销信号的每个可能的频率可以被置于合理的单个FFT的频率仓之一的中心 在接收机上执行的大小。 公开了用于产生和检测这些信号的方法和系统。
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公开(公告)号：US20060127104A1
公开(公告)日：2006-06-15
申请号：US11067011
申请日：2005-02-28
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。
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50.发明申请Optical waveform for use in a DWDM optical network and systems for generating and processing same 有权用于DWDM光网络的光波形及其生成和处理系统公开(公告)号：US20060078337A1
公开(公告)日：2006-04-13
申请号：US11281437
申请日：2005-11-18
申请人： James Harley , Lacra Pavel
发明人： James Harley , Lacra Pavel
IPC分类号： H04B10/04
CPC分类号： H04B10/07955 , H04B10/077 , H04J14/02 , H04J14/0298 , H04L5/02 , H04L27/10
摘要： An optical signal occupying one or more wavelengths. An optical data signal on each wavelength is modulated with a respective overhead (dither) signal, resulting in a respective dithered optical signal. The amplitude of a particular overhead signal used to modulate the corresponding optical data signal is chosen so that the RMS value of the overhead signal in the dithered optical signal is proportional to the average intensity of the optical data signal. The instantaneous frequency of each overhead signal is time-varying and each possible frequency belongs to a distinct set of frequencies which are all harmonically related to a fundamental frequency. The distinctness of each set of frequencies allows each overhead signal to be uniquely isolated from an aggregate overhead signal. The harmonic relationship among the frequencies allows improved accuracy of RMS detection at a receiver as well as reduced computational complexity, as each possible frequency for each overhead signal can be made to fall at the center of one of the frequency bins of a single FFT of reasonable size performed at a receiver. Methods and systems for generating and detecting such signals are disclosed.
摘要翻译： 占据一个或多个波长的光信号。 每个波长上的光学数据信号用相应的开销（抖动）信号进行调制，产生相应的抖动光信号。 选择用于调制对应的光数据信号的特定开销信号的振幅，使得抖动光信号中的开销信号的RMS值与光数据信号的平均强度成比例。 每个开销信号的瞬时频率是时变的，并且每个可能的频率属于与基频谐波相关的一组不同的频率。 每组频率的独特性允许每个开销信号与聚合开销信号唯一隔离。 频率之间的谐波关系允许提高接收机RMS检测的精度以及降低的计算复杂度，因为每个开销信号的每个可能的频率可以被置于合理的单个FFT的频率仓之一的中心 在接收机上执行的大小。 公开了用于产生和检测这些信号的方法和系统。
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