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1. 发明授权

US09590730B2 Optical transmitter with optical receiver-specific dispersion pre-compensation 有权
标题翻译：具有光接收机特定色散预补偿的光发射机
公开(公告)号：US09590730B2
公开(公告)日：2017-03-07
申请号：US14503550
申请日：2014-10-01
申请人： Futurewei Technologies, Inc.
发明人： Xiang Liu , Frank Effenberger
IPC分类号： H04B10/50 , H04J14/00 , H04B10/272 , H04B10/2507 , H04B10/2575 , H04B10/2513
CPC分类号： H04B10/2513 , H04B10/2507 , H04B10/25137 , H04B10/2575 , H04B10/25752
摘要： An apparatus comprising a digital signal processor (DSP) unit configured to perform fiber dispersion pre-compensation on a digital signal sequence based on a dispersion value to produce a pre-compensated signal, wherein the dispersion value is associated with a remote optical receiver, a plurality of digital-to-analog converters (DACs) coupled to the DSP unit and configured to convert the pre-compensated signal into analog electrical signals, and a frontend coupled to the DACs and configured to convert the analog electrical signals into a first optical signal, adding a constant optical electric (E)-field to the first optical signal to produce a second optical signal, and transmit the second optical signal to the remote optical receiver.
摘要翻译：一种包括数字信号处理器（DSP）单元的装置，其被配置为基于色散值对数字信号序列执行光纤色散预补偿以产生预补偿信号，其中色散值与远程光接收机相关联，多个数字 - 模拟转换器（DAC），其耦合到所述DSP单元并且被配置为将所述预补偿信号转换为模拟电信号，以及前端耦合到所述DAC并且被配置为将所述模拟电信号转换为第一光信号向所述第一光信号添加恒定的光电（E）场，以产生第二光信号，并将所述第二光信号发射到所述远程光接收机。

2. 发明申请

US20160080084A1 DIGITAL OPTICAL SPECTRAL SHAPING 有权
公开(公告)号：US20160080084A1
公开(公告)日：2016-03-17
申请号：US14947539
申请日：2015-11-20
申请人： David W. BOERTJES , Kevin MACNEILL , Jamie GAUDETTE
发明人： David W. BOERTJES , Kevin MACNEILL , Jamie GAUDETTE
IPC分类号： H04B10/2513 , H04L7/00 , H04J14/06 , H04B10/61 , H04B10/516 , H04L25/03
CPC分类号： H04B10/25137 , H04B10/25073 , H04B10/516 , H04B10/6161 , H04B10/6162 , H04J14/06 , H04L7/0075 , H04L25/03828
摘要： A method and system for generating an optical channel signal for transmission through an optical fiber link of an optical communications system. A digital filter processes an input data signal using a compensation function and a shaping function to generate a pair of multi-bit sample streams representing a target optical E-field envelope of the optical channel signal. A modulator modulates an optical carrier light using the pair of multi-bit sample streams to generate the optical channel signal. The compensation function is designed to at least partially compensate impairments of the optical fiber link. The predetermined shaping function is designed to modify a baseband spectrum of the target optical E-field envelope.

3. 发明授权

US09287979B2 DAC-based optical modulator and demodulator 有权
标题翻译：基于DAC的光调制器和解调器
公开(公告)号：US09287979B2
公开(公告)日：2016-03-15
申请号：US14243720
申请日：2014-04-02
申请人： ViaSat, Inc.
发明人： Sameep Dave , Matthew Nimon , Fan Mo , William Thesling
IPC分类号： H04B10/00 , H04B10/2513 , H04B10/516 , H04B10/69 , H04B10/2507 , H04B10/60 , H04L7/00 , H04L25/03
CPC分类号： H04B10/25137 , H04B10/2507 , H04B10/516 , H04B10/60 , H04B10/6971 , H04L7/0075 , H04L25/03834
摘要： Methods, systems, and devices are described for modulating and demodulating data on optical signals. During modulation, at least one stream of symbol mapped bits is filtered with at least one pulse shaping filter to reduce a bandwidth of the stream of bits and to pre-compensate for at least one identified non-ideal transmission condition. The filtered bits are modulated onto a waveform in the digital domain, and the modulated filtered bits are transmitted to digital-to-analog converter. The output of the digital-to-analog converter is converted to an optical signal. During demodulation, a received optical signal is sampled at a first sampling rate at an ADC, downsampled to a lower sampling rate for filtering, filtered with at least one discrete pulse-shaping filter, upsampled for equalization and demodulation, and then equalized and demodulated.
摘要翻译：描述了用于调制和解调光信号数据的方法，系统和装置。在调制期间，利用至少一个脉冲整形滤波器对符号映射比特的至少一个流进行滤波，以减少比特流的带宽并对至少一个识别的非理想传输条件进行预补偿。滤波后的位被调制到数字域中的波形上，调制滤波后的位被传送到数模转换器。数/模转换器的输出转换为光信号。在解调期间，接收到的光信号以ADC的第一采样率进行采样，下采样到较低的采样率进行滤波，用至少一个离散脉冲整形滤波器滤波，对采样进行均衡和解调，然后进行均衡和解调。

4. 发明授权

US09184789B2 Communication apparatus 有权
标题翻译：通讯设备
公开(公告)号：US09184789B2
公开(公告)日：2015-11-10
申请号：US13559883
申请日：2012-07-27
申请人： Yasuhiro Nakasha , Hiroki Hayashi , Takumi Itoh
发明人： Yasuhiro Nakasha , Hiroki Hayashi , Takumi Itoh
IPC分类号： H04B1/717 , H04B10/2513 , H04B1/719 , H04L25/03 , H04L25/49
CPC分类号： H04B1/7174 , H04B1/719 , H04B10/25137 , H04L25/03834 , H04L25/4904 , H04L25/4915
摘要： A communication apparatus includes: a pulse generation unit configured to alternately generate a positive pulse and a negative pulse indicating presence or absence of a pulse in accordance with a value of a data signal; a band-pass filter configured to filter the pulse generated by the pulse generator; and a transmission amplifier configured to amplify a signal filtered by the band-pass filter, and to output the signal as a transmission signal.
摘要翻译：通信装置包括：脉冲生成单元，被配置为根据数据信号的值交替地产生指示有无脉冲的正脉冲和负脉冲; 带通滤波器，被配置为对由脉冲发生器产生的脉冲进行滤波; 以及发送放大器，被配置为放大由所述带通滤波器滤波的信号，并且将所述信号作为发送信号输出。

5. 发明申请

US20150222360A1 DIGITAL OPTICAL SPECTRAL SHAPING 有权
标题翻译：数字光学光谱形状
公开(公告)号：US20150222360A1
公开(公告)日：2015-08-06
申请号：US14173033
申请日：2014-02-05
申请人： David W. BOERTJES , Kevin MACNEILL , Jamie GAUDETTE
发明人： David W. BOERTJES , Kevin MACNEILL , Jamie GAUDETTE
IPC分类号： H04B10/2513 , H04B10/61 , H04L7/00 , H04B10/516 , H04L25/03
CPC分类号： H04B10/25137 , H04B10/25073 , H04B10/516 , H04B10/6161 , H04B10/6162 , H04J14/06 , H04L7/0075 , H04L25/03828
摘要： A method and system for generating an optical channel signal for transmission through an optical fiber link of an optical communications system. A digital filter processes an input data signal using a compensation function and a shaping function to generate a pair of multi-bit sample streams representing a target optical E-field envelope of the optical channel signal. A modulator modulates an optical carrier light using the pair of multi-bit sample streams to generate the optical channel signal. The compensation function is designed to at least partially compensate impairments of the optical fiber link. The predetermined shaping function is designed to modify a baseband spectrum of the target optical E-field envelope.
摘要翻译：一种用于产生用于通过光通信系统的光纤链路进行传输的光信道信号的方法和系统。数字滤波器使用补偿函数和整形功能来处理输入数据信号，以产生表示光信道信号的目标光电场包络的一对多比特采样流。调制器使用一对多比特采样流来调制光载波，以产生光信道信号。补偿功能被设计为至少部分地补偿光纤链路的损伤。预定整形功能被设计为修改目标光学电场包络的基带频谱。

6. 发明授权

US08958666B2 Methods of achieving optimal communications performance 有权
公开(公告)号：US08958666B2
公开(公告)日：2015-02-17
申请号：US11649337
申请日：2007-01-03
申请人： David O. Caplan , Walid A. Atia
发明人： David O. Caplan , Walid A. Atia
IPC分类号： G02B6/12 , H04B10/2513 , H04B10/50 , H04B10/508 , G02B6/36
CPC分类号： H04B10/25137 , H04B10/505 , H04B10/5051 , H04B10/508
摘要： A system includes an optical transmitter that outputs an optical signal having a substantially Gaussian waveform and an optical receiver that is optically coupled to the optical transmitter and has an impulse response essentially matching the waveform. The impulse response and waveform preferably match in the time domain. The transmitter and receiver may be average-power-limited, using, for example, an erbium-doped fiber amplifier. To achieve a high signal-to-noise ratio, the waveform may be designed to minimize jitter, sample duration, matching parasitics, and inter-symbol interference (ISI). Such a waveform may be a return-to-zero (RZ) Gaussian or Gaussian-like waveform and may be transmitted in a variety of modulation formats. Further, the system may be used in WDM or TDM systems. A method for characterizing the time domain impulse response of an optical element used in the optical receiver is provided, where the method is optionally optimized using deconvolution and/or cross-correlation techniques.

7. 发明授权

US08867657B1 Communication using analog pulses having exponentially-shaped leading edges 有权
标题翻译：使用具有指数形状的前沿的模拟脉冲进行通信
公开(公告)号：US08867657B1
公开(公告)日：2014-10-21
申请号：US14182082
申请日：2014-02-17
申请人： Board of Regents of the University of Texas System
发明人： Robert H. Flake
IPC分类号： H04L27/00 , H04B1/02 , H04B1/06 , H04B1/7163 , H04B10/524 , H04B10/2513 , H04B1/717
CPC分类号： H04L27/06 , H04B1/02 , H04B1/06 , H04B1/7163 , H04B1/7174 , H04B3/02 , H04B10/25137 , H04B10/524 , H04L25/03834
摘要： A first transmitter transmits symbols. The leading edge of each symbol has the form Djexp{αjt}, where Dj is real, where αj is selected from N possible values based on a current group of bits. The receiver has N filters whose transfer functions correspond respectively to the N possible values. The filter outputs are used to recover the group of bits. A second transmitter transmits an exponential symbol or a zero symbol depending on a current bit to be transmitted. The zero symbol has zero amplitude over the symbol period. The corresponding receiver applies threshold detection to estimate the transmitted bits. A third transmitter transmits a sequence of analog pulses with known interpulse time separation(s). The pulse sequence reflects from a moving object. A receiver captures the reflected pulse sequence. The interpulse separation(s) of the reflect pulse sequence is used to determine the radial velocity of the object.
摘要翻译：第一发射机发送符号。每个符号的前沿具有形式Djexp {αjt}，其中Dj是实数，其中αj基于当前组的N个可能值来选择。接收机具有N个滤波器，其传递函数分别对应于N个可能值。滤波器输出用于恢复位组。第二发射机根据要发送的当前比特发送指数符号或零符号。零符号在符号周期内具有零幅度。相应的接收机应用阈值检测来估计发送的比特。第三发射器发射具有已知的脉冲间隔的一系列模拟脉冲。脉冲序列从移动物体反射。接收器捕获反射脉冲序列。反射脉冲序列的脉冲间隔用于确定物体的径向速度。

8. 发明申请

US20140212136A1 OPTICAL TRANSMITTER AND MODULATED OPTICAL SIGNAL GENERATING METHOD 有权
标题翻译：光发射机和调制光信号发生方法
公开(公告)号：US20140212136A1
公开(公告)日：2014-07-31
申请号：US14132867
申请日：2013-12-18
申请人： FUJITSU LIMITED
发明人： Yuichi Akiyama , Takeshi Hoshida , Tamotsu Akashi , Yoshio Sakai
IPC分类号： H04B10/532
CPC分类号： H04B10/532 , H04B10/2513 , H04B10/25137 , H04B10/50597 , H04B2210/254
摘要： An optical transmitter includes: an optical modulator including a first modulation unit and a second modulation unit respectively configured to propagate a first optical signal and a second optical signal that are obtained by splitting input light; a signal generator configured to generate a first drive signal and a second drive signal that are respectively supplied to the first modulation unit and the second modulation unit; a phase controller configured to control a phase difference between the first optical signal and the second optical signal in the optical modulator; and a phase difference detector configured to detect the phase difference between the first optical signal and the second optical signal controlled by the phase controller. The signal generator generates the first drive signal and the second drive signal based on the phase difference detected by the phase difference detector.
摘要翻译：光发射机包括：光调制器，包括第一调制单元和第二调制单元，第一调制单元和第二调制单元分别被配置为传播通过分割输入光获得的第一光信号和第二光信号; 信号发生器，被配置为产生分别提供给所述第一调制单元和所述第二调制单元的第一驱动信号和第二驱动信号; 相位控制器，被配置为控制所述光调制器中的所述第一光信号和所述第二光信号之间的相位差; 以及相位差检测器，被配置为检测由所述相位控制器控制的所述第一光信号和所述第二光信号之间的相位差。信号发生器基于由相位差检测器检测的相位差产生第一驱动信号和第二驱动信号。

9. 发明授权

US08731413B1 DAC-based optical modulator and demodulator 有权
标题翻译：基于DAC的光调制器和解调器
公开(公告)号：US08731413B1
公开(公告)日：2014-05-20
申请号：US13356167
申请日：2012-01-23
申请人： Sameep Dave , Matthew Nimon , Fan Mo , William Thesling
发明人： Sameep Dave , Matthew Nimon , Fan Mo , William Thesling
IPC分类号： H04B10/00
CPC分类号： H04B10/25137 , H04B10/2507 , H04B10/516 , H04B10/60 , H04B10/6971 , H04L7/0075 , H04L25/03834
摘要： Methods, systems, and devices are described for modulating and demodulating data on optical signals. During modulation, at least one stream of symbol mapped bits is filtered with at least one pulse shaping filter to reduce a bandwidth of the stream of bits and to pre-compensate for at least one identified non-ideal transmission condition. The filtered bits are modulated onto a waveform in the digital domain, and the modulated filtered bits are transmitted to digital-to-analog converter. The output of the digital-to-analog converter is converted to an optical signal. During demodulation, a received optical signal is sampled at a first sampling rate at an ADC, downsampled to a lower sampling rate for filtering, filtered with at least one discrete pulse-shaping filter, upsampled for equalization and demodulation, and then equalized and demodulated.
摘要翻译：描述了用于调制和解调光信号数据的方法，系统和装置。在调制期间，利用至少一个脉冲整形滤波器对符号映射比特的至少一个流进行滤波，以减少比特流的带宽并对至少一个识别的非理想传输条件进行预补偿。滤波后的位被调制到数字域中的波形上，调制滤波后的位被传送到数模转换器。数/模转换器的输出转换为光信号。在解调期间，接收到的光信号以ADC的第一采样率进行采样，下采样到较低的采样率进行滤波，用至少一个离散脉冲整形滤波器滤波，对采样进行均衡和解调，然后进行均衡和解调。

10. 发明授权

US08693887B2 Optical transmitter and optical transmission system 失效
标题翻译：光发射机和光传输系统
公开(公告)号：US08693887B2
公开(公告)日：2014-04-08
申请号：US11978682
申请日：2007-10-30
申请人： Hiroshi Nakamoto
发明人： Hiroshi Nakamoto
IPC分类号： H04B10/00 , H04B10/2513
CPC分类号： H04B10/25137 , H04B10/255 , H04B10/505 , H04B10/5051 , H04B10/5055 , H04B10/508
摘要： An optical transmitter of the invention phase modulates an output light from a light source according to data using a phase modulator, and then supplies it to an intensity modulator. The intensity modulator performs pulse carving of the output light from the phase modulator in accordance with a clock signal in which a duty cycle is changed to a value different from 50% by a waveform transformation circuit, with an operating range being a slope from a trough to a crest in the photoelectric response characteristics. As a result, it is possible to realize, at the same time, duty cycle and chirp characteristics that enable excellent transmission characteristics to be obtained.
摘要翻译：本发明的光发射机根据使用相位调制器的数据对来自光源的输出光进行相位调制，然后将其提供给强度调制器。强度调制器根据时钟信号执行来自相位调制器的输出光的脉冲雕刻，其中占空比通过波形变换电路改变为不同于50％的值，其工作范围是从槽的斜率到光电响应特征的顶峰。结果，能够同时实现能够获得良好的传输特性的占空比和啁啾特性。

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