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    Off quadrature Mach-Zehnder modulator biasing
    1.
    发明授权
    Off quadrature Mach-Zehnder modulator biasing 有权

    公开(公告)号：US10116391B2

    公开(公告)日：2018-10-30

    申请号：US15802338

    申请日：2017-11-02

    Applicant: INPHI CORPORATION

    Inventor： Todd Rope ,  Radhakrishnan L. Nagarajan ,  Hari Shankar

    IPC: G02F1/01 ,  H04B10/516

    Abstract: The present invention relates to telecommunication techniques and integrated circuit (IC) devices. More specifically, embodiments of the present invention provide an off-quadrature modulation system. Once an off-quadrature modulation position is determined, a ratio between DC power transfer amplitude and dither tone amplitude for a modulator is as a control loop target to stabilize off-quadrature modulation. DC power transfer amplitude is obtained by measuring and sampling the output of an optical modulator. Dither tone amplitude is obtained by measuring and sampling the modulator output and performing calculation using the optical modulator output values and corresponding dither tone values. There are other embodiments as well.

    Driver module for mach zehnder modulator
    3.
    发明授权
    Driver module for mach zehnder modulator 有权
    马赫祖德调制器的驱动模块

    公开(公告)号：US09553673B1

    公开(公告)日：2017-01-24

    申请号：US14798322

    申请日：2015-07-13

    Applicant: Inphi Corporation

    Inventor： Radhakrishnan L. Nagarajan ,  Todd Rope

    IPC: H04B10/00 ,  H04B10/524 ,  H03M1/68

    CPC classification number: H04B10/5161 ,  G02F1/0123 ,  G02F1/2255 ,  G02F1/2257 ,  G02F2001/212 ,  H03M1/682 ,  H04B10/524 ,  H04B10/541

    Abstract: A single chip dual-channel driver for two independent traveling wave modulators. The driver includes two differential pairs inputs per channel respectively configured to receive two digital differential pair signals. The driver further includes a two-bit DAC per channel coupled to the two differential pairs inputs to produce a single analog differential pair PAM signal at a differential pair output for driving a traveling wave modulator. Additionally, the driver includes a control block having internal voltage/current signal generators respective coupled to each input and the 2-bit DAC for providing a bias voltage, a tail current, a dither signal to assist modulation control per channel. Furthermore, the driver includes an internal I2C communication block coupled to a high-speed clock generator to generate control signals to the control block and coupled to host via an I2C digital communication interface.

    Abstract translation: 用于两个独立行波调制器的单芯片双通道驱动器。 驱动器包括每个通道的两个差分对输入，分别配置为接收两个数字差分对信号。 驱动器还包括耦合到两个差分对输入的每个通道的两位DAC，以在用于驱动行波调制器的差分对输出处产生单个模拟差分对PAM信号。 此外，驱动器包括具有各自耦合到每个输入的内部电压/电流信号发生器的控制块和用于提供偏置电压的2位DAC，尾部电流，抖动信号以辅助每个通道的调制控制。 此外，驱动器包括耦合到高速时钟发生器的内部I2C通信块，以产生到控制块的控制信号并通过I2C数字通信接口耦合到主机。

    System and method for calibration of an optical module
    4.
    发明授权
    System and method for calibration of an optical module 有权
    用于校准光学模块的系统和方法

    公开(公告)号：US09553663B1

    公开(公告)日：2017-01-24

    申请号：US14860548

    申请日：2015-09-21

    Applicant: INPHI CORPORATION

    Inventor： Todd Rope

    IPC: H04B10/08 ,  H04B10/07

    CPC classification number: H04B10/0775 ,  H04B10/07955 ,  H04B10/07957 ,  H04B10/40

    Abstract: A system and method for calibrating an optical module. The optical module including a microprocessor with non-volatile memory is provided at a calibration station for measuring calibrated value of a device parameter against raw values starting from minimum value in each of multiple zones of a primary parameter with one or more secondary parameters at least being set to a basis calibration point to determine coefficients for generating a N-spline function for the multiple zones and multiple multipliers for each zone corresponding to multiple calibration points. The coefficients and multiple multipliers are stored in the non-volatile memory and reused respectively for calculating a basis calibrated value based on any current raw value of the primary parameter a N-spline function in particular zone and for determining a final multiplier by interpolation of the multiple multipliers associated with the one or more secondary parameters, leading to a calibrated value for any condition.

    Abstract translation: 一种用于校准光学模块的系统和方法。 包括具有非易失性存储器的微处理器的光学模块被提供在校准站处，用于根据原始值测量设备参数的校准值，从原始参数的多个区域的每个区域中的最小值开始，其中一个或多个次要参数至少为 设置为基准校准点，以确定用于为多个区域生成N样条函数的系数和对应于多个校准点的每个区域的多个乘法器。 系数和多乘法器被分别存储在非易失性存储器中并重新用于基于主要参数的任何当前原始值，特定区域中的N样条函数的计算基准校准值，并且用于通过插值来确定最终乘数 与一个或多个次要参数相关联的多个乘法器，导致任何条件的校准值。

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