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1. 发明授权

US10862589B2 Histogram based optimization for optical modulation 有权
公开(公告)号：US10862589B2
公开(公告)日：2020-12-08
申请号：US16828820
申请日：2020-03-24
申请人： INPHI CORPORATION
发明人： Todd Rope , Hari Shankar , Radhakrishnan L. Nagarajan
IPC分类号： H04B10/079 , H04B10/516 , H04B10/40 , H04B10/572 , H04B10/50 , H04L1/20 , H04L1/00
摘要： The present invention is directed to communication systems and methods. In a specific embodiment, the present invention provides an optical receiver that receives a data stream from an optical transmitter. The optical receiver determines a histogram contour parameter using the data stream and inserts the histogram contour parameter into a back-channel data segment, which is then transmitted to the optical transmitter. The optical transmitter changes its data transmission setting based on the histogram contour parameter. There are other embodiments as well.

2. 发明授权

US10333627B2 Rx delay line inteferometer tracking in closed-loop module control for communication 有权
公开(公告)号：US10333627B2
公开(公告)日：2019-06-25
申请号：US15633353
申请日：2017-06-26
申请人： INPHI CORPORATION
发明人： Todd Rope , Sung Choi , James Stewart , Radhakrishnan L. Nagarajan , Paul Yu , Ilya Lyubomirsky
IPC分类号： H04B10/69 , H04B10/61 , H04B10/67 , H04L27/18 , G02B6/12 , G02B6/293 , H04B17/20 , H04L27/06
摘要： The present invention is directed to a communication signal tracking system comprising an optical receiver including one or more delay line interferometers (DLIs) configured to demultiplex incoming optical signals and a transimpedance amplifier configured to convert the incoming optical signals to incoming electrical signals. The communication signal tracking system further includes a control module configured to calculate a bit-error-rate (BER) of the incoming electrical signals before forward-error correction decoding, and use the BER as a parameter for optimizing settings of the one or more DLIs in one or more iterations in a control loop and generating a back-channel data.

3. 发明授权

US10009109B2 Enhanced digital diagnostics for optical PAM apparatus 有权
公开(公告)号：US10009109B2
公开(公告)日：2018-06-26
申请号：US15688435
申请日：2017-08-28
申请人： INPHI CORPORATION
发明人： Todd Rope , Radhakrishnan L. Nagarajan , Jamal Riani , Pulkit Khandelwal
IPC分类号： H04B10/079 , H04B10/40
CPC分类号： H04B10/40 , H04B10/0731 , H04B10/0795 , H04B10/524
摘要： A Pulse Amplitude Modulated (PAM) optical device utilizing multiple wavelengths, features a communications interface having enhanced diagnostics capability. New registers are created to house additional diagnostic information, such as error rates. The diagnostic information may be stored in raw form, or as processed on-chip utilizing local resources.

4. 发明授权

US10116391B2 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
申请人： INPHI CORPORATION
发明人： Todd Rope , Radhakrishnan L. Nagarajan , Hari Shankar
IPC分类号： G02F1/01 , H04B10/516
摘要： 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.

5. 发明授权

US09780869B2 Enhanced digital diagnostics for optical PAM apparatus 有权
公开(公告)号：US09780869B2
公开(公告)日：2017-10-03
申请号：US15490555
申请日：2017-04-18
申请人： INPHI CORPORATION
发明人： Todd Rope
IPC分类号： H04B10/079 , H04L27/06 , H04B10/60
CPC分类号： H04B10/07953 , H04B10/0795 , H04B10/40 , H04B10/508 , H04B10/54 , H04B10/60 , H04B10/801 , H04L27/06
摘要： A Pulse Amplitude Modulated (PAM) optical device utilizing multiple wavelengths, features a communications interface having enhanced diagnostics capability. New registers are created to house additional diagnostic information, such as error rates. The diagnostic information may be stored in raw form, or as processed on-chip utilizing local resources.

6. 发明授权

US09553673B1 Driver module for mach zehnder modulator 有权
标题翻译：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
申请人： Inphi Corporation
发明人： Radhakrishnan L. Nagarajan , Todd Rope
IPC分类号： H04B10/00 , H04B10/524 , H03M1/68
CPC分类号： H04B10/5161 , G02F1/0123 , G02F1/2255 , G02F1/2257 , G02F2001/212 , H03M1/682 , H04B10/524 , H04B10/541
摘要： 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.
摘要翻译：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。

7. 发明授权

US09553663B1 System and method for calibration of an optical module 有权
标题翻译：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
申请人： INPHI CORPORATION
发明人： Todd Rope
IPC分类号： H04B10/08 , H04B10/07
CPC分类号： H04B10/0775 , H04B10/07955 , H04B10/07957 , H04B10/40
摘要： 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.
摘要翻译：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。

8. 发明授权

US11153013B2 Histogram based optimization for optical modulation 有权
公开(公告)号：US11153013B2
公开(公告)日：2021-10-19
申请号：US17090482
申请日：2020-11-05
申请人： INPHI CORPORATION
发明人： Todd Rope , Hari Shankar , Radhakrishnan L. Nagarajan
IPC分类号： H04B10/40 , H04B10/079 , H04B10/516 , H04B10/572 , H04L1/00 , H04B10/50 , H04L1/20
摘要： The present invention is directed to communication systems and methods. In a specific embodiment, the present invention provides an optical receiver that receives a data stream from an optical transmitter. The optical receiver determines a histogram contour parameter using the data stream and inserts the histogram contour parameter into a back-channel data segment, which is then transmitted to the optical transmitter. The optical transmitter changes its data transmission setting based on the histogram contour parameter. There are other embodiments as well.

9. 发明授权

US10469176B2 Histogram based optimization for optical modulation 有权
公开(公告)号：US10469176B2
公开(公告)日：2019-11-05
申请号：US15644342
申请日：2017-07-07
申请人： Inphi Corporation
发明人： Todd Rope , Hari Shankar , Radhakrishnan L. Nagarajan
IPC分类号： H04B10/079 , H04B10/516 , H04B10/40 , H04B10/572 , H04L1/00 , H04B10/50 , H04L1/20
摘要： The present invention is directed to communication systems and methods. In a specific embodiment, the present invention provides an optical receiver that receives a data stream from an optical transmitter. The optical receiver determines a histogram contour parameter using the data stream and inserts the histogram contour parameter into a back-channel data segment, which is then transmitted to the optical transmitter. The optical transmitter changes its data transmission setting based on the histogram contour parameter. There are other embodiments as well.

10. 发明授权

US09900088B2 Enhanced digital diagnostics for optical PAM apparatus 有权
公开(公告)号：US09900088B2
公开(公告)日：2018-02-20
申请号：US15693856
申请日：2017-09-01
申请人： INPHI CORPORATION
发明人： Todd Rope
IPC分类号： H04B10/079 , H04L27/06 , H04B10/60
CPC分类号： H04B10/07953 , H04B10/0795 , H04B10/40 , H04B10/508 , H04B10/54 , H04B10/60 , H04B10/801 , H04L27/06
摘要： A Pulse Amplitude Modulated (PAM) optical device utilizing multiple wavelengths, features a communications interface having enhanced diagnostics capability. New registers are created to house additional diagnostic information, such as error rates. The diagnostic information may be stored in raw form, or as processed on-chip utilizing local resources.

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