公开(公告)号：US20210028860A1

公开(公告)日：2021-01-28

申请号：US17071701

申请日：2020-10-15

Applicant: INPHI CORPORATION

Inventor： Todd ROPE ,  Radhakrishnan L. NAGARAJAN

IPC: H04B10/079 ,  H04B10/40

Abstract: The present invention is directed to communication systems and methods. According to an embodiment, a receiving optical transceiver determines signal quality for signals received from a transmitting optical transceiver. Information related to the signal quality is embedded into back-channel data and sent to the transmitting optical transceiver. The transmitting optical transceiver detects the presence of the back-channel data and adjusts one or more of its operating parameters based on the back-channel data. There are other embodiments as well.

公开(公告)号：US20190268075A1

公开(公告)日：2019-08-29

申请号：US16408256

申请日：2019-05-09

Applicant: INPHI CORPORATION

Inventor： Todd ROPE ,  Sung CHOI ,  James STEWART ,  Radhakrishnan L. NAGARAJAN ,  Paul YU ,  Ilya LYUBOMIRSKY

IPC: H04B10/61 ,  H04B17/20 ,  G02B6/293 ,  G02B6/12 ,  H04L27/18 ,  H04B10/69 ,  H04B10/67

Abstract: 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.

公开(公告)号：US20180294884A1

公开(公告)日：2018-10-11

申请号：US15990003

申请日：2018-05-25

Applicant: INPHI CORPORATION

Inventor： Todd ROPE ,  Radhakrishnan L. NAGARAJAN ,  Jamal RIANI ,  Pulkit KHANDELWAL

IPC: H04B10/40 ,  H04B10/079 ,  H04B10/073 ,  H04B10/524

CPC classification number: H04B10/40 ,  H04B10/0731 ,  H04B10/0795 ,  H04B10/524

Abstract: 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.

公开(公告)号：US20180212712A1

公开(公告)日：2018-07-26

申请号：US15411914

申请日：2017-01-20

Applicant: INPHI CORPORATION

Inventor： Todd ROPE ,  Radhakrishnan L. NAGARAJAN

IPC: H04L1/00 ,  H04B10/40 ,  H04B10/079 ,  H04L1/20

CPC classification number: H04B10/07953 ,  H04B10/40 ,  H04L1/0047

Abstract: The present invention is directed to communication systems and methods. According to an embodiment, a receiving optical transceiver determines signal quality for signals received from a transmitting optical transceiver. Information related to the signal quality is embedded into back-channel data and sent to the transmitting optical transceiver. The transmitting optical transceiver detects the presence of the back-channel data and adjusts one or more of its operating parameters based on the back-channel data. There are other embodiments as well.

公开(公告)号：US20170214469A1

公开(公告)日：2017-07-27

申请号：US15481920

申请日：2017-04-07

Applicant: INPHI CORPORATION

Inventor： Radhakrishnan L. NAGARAJAN ,  Todd ROPE

IPC: H04B10/524 ,  G02F1/225 ,  G02F1/01 ,  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.

公开(公告)号：US20200127739A1

公开(公告)日：2020-04-23

申请号：US16720472

申请日：2019-12-19

Applicant: INPHI CORPORATION

Inventor： Todd ROPE ,  Sung CHOI ,  James STEWART ,  Radhakrishnan L. NAGARAJAN ,  Paul YU ,  Ilya LYUBOMIRSKY

IPC: H04B10/61 ,  H04B17/20 ,  G02B6/293 ,  G02B6/12 ,  H04L27/18 ,  H04B10/69 ,  H04B10/67 ,  H04B10/079

Abstract: 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.

公开(公告)号：US20170366259A1

公开(公告)日：2017-12-21

申请号：US15693856

申请日：2017-09-01

Applicant: Inphi Corporation

Inventor： Todd ROPE

IPC: H04B10/079 ,  H04B10/60 ,  H04L27/06

CPC classification number: H04B10/07953 ,  H04B10/0795 ,  H04B10/40 ,  H04B10/508 ,  H04B10/54 ,  H04B10/60 ,  H04B10/801 ,  H04L27/06

Abstract: 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.

公开(公告)号：US20170126313A1

公开(公告)日：2017-05-04

申请号：US15407163

申请日：2017-01-16

Applicant: INPHI CORPORATION

Inventor： Todd ROPE

IPC: H04B10/077 ,  H04B10/079

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.

公开(公告)号：US20220029865A1

公开(公告)日：2022-01-27

申请号：US17186897

申请日：2021-02-26

Applicant: INPHI CORPORATION

Inventor： Todd ROPE ,  Ilya LYUBOMIRSKY ,  Whay Sing LEE ,  Arash FARHOODFAR

IPC: H04L25/03 ,  H04B10/079 ,  G06N20/00

Abstract: Embodiments address optimization of an electrical interface between an optical host device and an optical module device at installation time. Certain methods try each entry in a set of Finite Impulse Response (FIR) filter settings at the host transmitter, while asking the module to measure the signal integrity for each. The module will then provide an indication of which entry was the best choice for signal integrity in the current hardware configuration. Note that for the module to host electrical interface, this same technique can be used in reverse, whereby the host asks the module to configure its transmitting FIR filter, and the host records and keeps track of which filter setting is the best, and then configures the module with that filter setting. In both cases, for modules supporting CMIS (Common Management Interface Specification) for module configuration and control, methods are provided.

公开(公告)号：US20190363799A1

公开(公告)日：2019-11-28

申请号：US16536162

申请日：2019-08-08

Applicant: INPHI CORPORATION

Inventor： Todd ROPE ,  Radhakrishnan L. NAGARAJAN ,  Hari SHANKAR

IPC: H04B10/516 ,  H04B10/556 ,  H04B10/50 ,  H04J14/02 ,  H01S5/14 ,  G02F1/01 ,  G02F1/225 ,  H01S5/0687 ,  H01S5/40

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.