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    CALIBRATION OF PLUGGABLE OPTICAL MODULE
    2.
    发明申请
    CALIBRATION OF PLUGGABLE OPTICAL MODULE 审中-公开

    公开(公告)号：US20180183526A1

    公开(公告)日：2018-06-28

    申请号：US15735715

    申请日：2016-06-10

    Applicant: Oclaro Technology Limited

    Inventor： Robert Griffin

    IPC: H04B10/50 ,  H04B10/588 ,  H04B10/564 ,  H04B10/079 ,  G02F1/21

    CPC classification number: H04B10/50572 ,  G02F1/21 ,  G02F1/225 ,  G02F2001/212 ,  H04B10/07955 ,  H04B10/5057 ,  H04B10/50575 ,  H04B10/564 ,  H04B10/588 ,  H04B2210/254

    Abstract: An optical communications apparatus comprising a host (100) and an optical module (200) comprising a Mach-Zehnder modulator (202), MZM, wherein the optical module is removably connected to the host via a connection path, the optical communications apparatus comprising: a signal generator (101) at the host, configured to generate a plurality of calibration signals at a plurality of frequencies; a host interface (102) configured to transmit the calibration signals to the optical module via the connection path; a module interface (201) configured to receive the transmitted calibration signals; wherein the MZM is configured to use the calibration signals to modulate a laser light source (206) and biased to a point at which average output power is proportional to the output modulated signal; an optical detector configured to measure an average magnitude of an output of the MZM when each of the calibration signals is used to modulate the laser light source; one of a host calibration unit (103) and a module calibration unit (203), configured to determine a magnitude response of the connection path based on the measured average magnitudes and magnitudes of the respective calibration signals, and further configured to determine a pre-emphasis characteristic based on the magnitude response, the pre-emphasis characteristic for application to signals transmitted by the optical transmitter in use.

    METHOD FOR ELIMINATING NONLINEAR EFFECTS, TRANSMITTER AND RECEIVER
    4.
    发明申请
    METHOD FOR ELIMINATING NONLINEAR EFFECTS, TRANSMITTER AND RECEIVER 有权
    消除非线性效应，发射机和接收机的方法

    公开(公告)号：US20160380700A1

    公开(公告)日：2016-12-29

    申请号：US15039503

    申请日：2014-07-24

    Applicant: ZTE CORPORATION

    Inventor： Bailin SHEN

    IPC: H04B10/58 ,  H04B10/69

    CPC classification number: H04B10/58 ,  H04B10/25137 ,  H04B10/2543 ,  H04B10/697 ,  H04B2210/254

    Abstract: The present disclosure discloses a method for eliminating nonlinear effects, a transmitter and a receiver. The method includes: setting signals to be transmitted and redundant signals, where the redundant signals are symmetrical to the signals, which are to be transmitted, about Y axis; and after the setting is completed, respectively executing dispersion pre-compensation on the signals to be transmitted and the redundant signals, and executing signal modulation after the dispersion pre-compensation is completed.

    Abstract translation: 本公开公开了一种消除非线性效应的方法，发射机和接收机。 该方法包括：设置要传输的信号和冗余信号，其中冗余信号与要发射的信号对称，约为Y轴; 在完成设置之后，分别对要发送的信号和冗余信号执行色散预补偿，并且在分散预补偿完成之后执行信号调制。

    Optical transmitter and modulated optical signal generating method
    5.
    发明授权
    Optical transmitter and modulated optical signal generating method 有权
    光发射机和调制光信号产生方法

    公开(公告)号：US09130680B2

    公开(公告)日：2015-09-08

    申请号：US14132867

    申请日：2013-12-18

    Applicant: FUJITSU LIMITED

    Inventor： Yuichi Akiyama ,  Takeshi Hoshida ,  Tamotsu Akashi ,  Yoshio Sakai

    IPC: H04B10/00 ,  H04B10/532 ,  H04B10/2513 ,  H04B10/50

    CPC classification number: H04B10/532 ,  H04B10/2513 ,  H04B10/25137 ,  H04B10/50597 ,  H04B2210/254

    Abstract: 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.

    Abstract translation: 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。

    Optical communication system and optical communication method
    6.
    发明授权
    Optical communication system and optical communication method 有权
    光通信系统和光通信方式

    公开(公告)号：US08909060B2

    公开(公告)日：2014-12-09

    申请号：US13147079

    申请日：2010-01-08

    Applicant: Kiyoshi Fukuchi

    Inventor： Kiyoshi Fukuchi

    IPC: H04B10/18 ,  H04B10/12 ,  H04J14/02 ,  H04B10/2513

    CPC classification number: H04B10/25133 ,  H04B2210/252 ,  H04B2210/254

    Abstract: An optical communication system in which optical transmitter 101 that modulates an electric signal to an optical signal and transmits the optical signal and optical receiver 108 that receives the optical signal are connected via transmission path 107, wherein, when a change in the dispersion amount of chromatic dispersion caused by the optical signal passing through transmission path 107 is nearly eliminated, optical transmitter 101 and optical receiver 108 decrease the absolute value of a receiver-side dispersion compensation amount while keeping the total value of a transmitter-side dispersion compensation amount for compensating for the dispersion amount by optical transmitter 101 and the receiver-side dispersion compensation amount for compensating for the dispersion amount by optical receiver 108 substantially constant.

    Abstract translation: 一种光通信系统，其中通过传输路径107连接调制光信号的电信号并发送接收光信号的光信号和光接收机108的光发射机101，其中，当色散色散量的变化 通过传输路径107的光信号引起的色散几乎被消除，光发射机101和光接收机108降低接收机侧色散补偿量的绝对值，同时保持用于补偿的发射机侧色散补偿量的总值 光发射机101的色散量和用于补偿光接收机108的色散量基本上恒定的接收机侧色散补偿量。

    OPTICAL TRANSMISSION FOR BINARY AND DUOBINARY MODULATION FORMATS
    7.
    发明申请
    OPTICAL TRANSMISSION FOR BINARY AND DUOBINARY MODULATION FORMATS 有权
    二进制和二进制调制格式的光传输

    公开(公告)号：US20140255037A1

    公开(公告)日：2014-09-11

    申请号：US13793264

    申请日：2013-03-11

    Applicant: SEMTECH CORPORATION

    Inventor： Song Quan Shang

    IPC: H04B10/40 ,  H04L27/01

    CPC classification number: H04L27/01 ,  H04B10/5055 ,  H04B10/5167 ,  H04B10/6971 ,  H04B2210/254 ,  H04L25/03057

    Abstract: A transceiver includes a transmitter and a receiver. The transmitter includes a precoder stage, an encoder stage and a first converter stage. The precoder stage receives an input binary signal and a previously processed binary signal. The encoder stage is electrically coupled to the precoder stage and the first converter stage and includes a feed forward equalizer (FFE). The first converter stage generates a modulated signal. The receiver includes a second converter stage, an amplifier stage, a first equalizer stage and a second equalizer stage. The second converter stage receives the modulated signal. The first equalizer stage is electrically coupled to the amplifier stage. The second equalizer stage is electrically coupled to the first equalizer stage. The second equalizer stage includes a decision feedback equalizer (DFE) that converts the modulated signal into an output binary signal.

    Abstract translation: 收发器包括发射机和接收机。 发射机包括预编码器级，编码器级和第一转换级。 预编码器级接收输入二进制信号和先前处理的二进制信号。 编码器级电耦合到预编码器级和第一转换级，并且包括前馈均衡器（FFE）。 第一转换器级产生调制信号。 接收机包括第二转换器级，放大级，第一均衡器级和第二均衡器级。 第二转换器级接收调制信号。 第一均衡器级电耦合到放大器级。 第二均衡器级电耦合到第一均衡器级。 第二均衡器级包括将调制信号转换为输出二进制信号的判决反馈均衡器（DFE）。

    Phase shift keyed high speed signaling
    8.
    发明授权
    Phase shift keyed high speed signaling 有权
    相移键控高速信号

    公开(公告)号：US08351798B2

    公开(公告)日：2013-01-08

    申请号：US12252962

    申请日：2008-10-16

    Applicant: Sumudu Geethika Edirisinghe ,  Jörg Erich Schwartz ,  Wai Mun Wong

    Inventor： Sumudu Geethika Edirisinghe ,  Jörg Erich Schwartz ,  Wai Mun Wong

    IPC: H04B10/04 ,  H04B10/12

    CPC classification number: H04J14/02 ,  H04B10/07953 ,  H04B10/25137 ,  H04B10/25253 ,  H04B2210/252 ,  H04B2210/254

    Abstract: Fiber optic transmission technologies that allow DPSK or even higher order PSK to be performed at 20 gigabits per second per channel or even higher bit rates in a WDM (e.g., DWDM) wavelength multiplexed channeling environment. The technology employs pre-compensation of chromatic error dispersion such for each of most, if not all, channels have a portion of minimum absolute accumulated dispersion that occurs somewhere within the length (perhaps at the mid-point) of the optical channel. Post-compensation is then employed at the receiver to reduce or even potentially eliminate the chromatic dispersion. The technology allows for reduced bit error rates at high bit rates over even very long haul (e.g., trans-oceanic submarine or long terrestrial) optical fiber links, and for all channels.

    Abstract translation: 在WDM（例如DWDM）波长多路复用通道环境中允许以每通道20吉比特/秒甚至更高比特率执行DPSK或甚至更高阶PSK的光纤传输技术。 该技术采用色散误差的预补偿，因为大多数（如果不是全部）通道中的每一个通道具有出现在光通道的长度（可能在中点处）的某处的最小绝对累积色散的一部分。 接收机采用补偿后补偿，甚至可能消除色散。 该技术允许在甚至非常长的时间（例如，跨海洋或长的地面）光纤链路以及所有信道上以高比特率降低比特错误率。

    SKEW SUPPRESSION METHOD AND OPTICAL TRANSMISSION SYSTEM
    9.
    发明申请
    SKEW SUPPRESSION METHOD AND OPTICAL TRANSMISSION SYSTEM 有权
    SKEW抑制方法和光传输系统

    公开(公告)号：US20120263456A1

    公开(公告)日：2012-10-18

    申请号：US13369365

    申请日：2012-02-09

    Applicant: Toshiki Tanaka ,  Masato Nishihara

    Inventor： Toshiki Tanaka ,  Masato Nishihara

    IPC: H04B10/08 ,  H04B10/18

    CPC classification number: H04B10/5055 ,  H04B2210/254

    Abstract: A method for suppressing a skew between a first channel and a second channel in an optical transmission system having a transmitter that transmits an optical signal with the first channel and the second channel and a receiver that receives the optical signal, the method includes: controlling dispersion added to the optical signal to be larger than a specified amount; and controlling a delay time of at least one of the first channel and the second channel in the receiver based on a quality of the optical signal monitored in the receiver to suppress the skew between the first channel and the second channel in the receiver.

    Abstract translation: 一种用于抑制具有发送光信号与第一信道和第二信道的发射机的光传输系统中的第一信道和第二信道之间的偏斜的方法以及接收光信号的接收机，该方法包括：控制色散 添加到光信号大于指定量; 以及基于在接收机中监视的光信号的质量来控制接收机中的第一信道和第二信道中的至少一个的延迟时间，以抑制接收机中第一信道和第二信道之间的偏斜。

    Optical transmission system
    10.
    发明授权
    Optical transmission system 有权
    光传输系统

    公开(公告)号：US08270843B2

    公开(公告)日：2012-09-18

    申请号：US12289531

    申请日：2008-10-29

    Applicant: Hiroshi Nakamoto

    Inventor： Hiroshi Nakamoto

    IPC: H04B10/00

    CPC classification number: H04B10/2507 ,  H04B2210/252 ,  H04B2210/254

    Abstract: An optical transmission system capable of efficiently reducing waveform distortion of an optical signal. A transmitting-side distortion compensation coefficient storage of a transmitting station stores transmitting-side distortion compensation coefficients for compensating for waveform distortion of an optical signal to be transmitted to a receiving station. A transmit signal processor performs distortion compensation on the optical signal on the basis of a suitable transmitting-side distortion compensation coefficient stored in the transmitting-side distortion compensation coefficient storage. A transmitter transmits the distortion-compensated signal to a transmission path. A receiver of the receiving station receives the optical signal from the transmission path. A receiving-side distortion compensation coefficient storage stores receiving-side distortion compensation coefficients for compensating for waveform distortion of the optical signal received by the receiver. A received signal processor performs distortion compensation on the received optical signal on the basis of a suitable receiving-side distortion compensation coefficient.

    Abstract translation: 一种能够有效降低光信号的波形失真的光传输系统。 发送台的发送侧失真补偿系数存储部存储用于补偿要发送到接收站的光信号的波形失真的发送侧失真补偿系数。 发送信号处理器基于存储在发送侧失真补偿系数存储器中的合适的发送侧失真补偿系数，对光信号进行失真补偿。 发射机将失真补偿信号发送到传输路径。 接收站的接收机从传输路径接收光信号。 接收侧失真补偿系数存储器存储用于补偿由接收机接收的光信号的波形失真的接收侧失真补偿系数。 接收信号处理器基于合适的接收侧失真补偿系数对所接收的光信号执行失真补偿。

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