Inphi Corporation

Clariphy Communications, Inc.

Shih Cheng Wang

Matthew Charles Bashaw

Seyedmohammadreza Motaghiannezam

Oscar Ernesto Agazzi

Mario Rafael Hueda

Diego Ernesto Crivelli

Hugo Santiago Carrer

Shu Hao Fan

Jinwoo Cho

Norman L Swenson

Vadim Gutnik

Geoffrey O Hatcher

Paul Voois

Ramiro Rogelio Lopez

Martin Ignacio Del Barco

Jorge Manuel Finochietto

Jeffrey Zachan

Michael Yeo

Andre Chartrand

Alfredo Javier Taddei

Martin Serra

Cesar Sanchez Peñak

A receiver applies a calibration method to compensate for skew between input channels. The receiver skew is estimated by observing the coefficients of an adaptive equalizer which adjusts the coefficients based on time-varying properties of the multi-channel input signal. The receiver skew is compensated by programming the phase of the sampling clocks for the different channels. Furthermore, during real-time operation of the receiver, channel diagnostics is performed to automatically estimate differential group delay and/or other channel characteristics based on the equalizer coefficients using a frequency averaging or polarization averaging approach. Framer information can furthermore be utilized to estimate differential group delay that is an integer multiple of the symbol rate. Additionally, a DSP reset may be performed when substantial signal degradation is detected based on the channel diagnostics information.

Channel diagnostics based on equalizer coefficients

Systems and methods described herein include methods and systems for controlling bias voltage provided to an optical modulating device. The optical modulating device is biased at a bias point that is different from a null point of the device such that an offset to the received optical power due to limited extinction ratio is reduced.

Systems and methods for biasing optical modulating devices

A transceiver for fiber optic communications. The transceiver can include a transmitter module having a transmitter host interface configured to receive an input host signal; a transmitter framer configured to frame the input host signal and to generate a framed host signal; and a transmitter coder configured to encode the framed host signal to generate an encoded host signal for transmission over a communication channel. The transceiver can also include a receiver module having a bulk chromatic dispersion, fiber length estimation, and coarse carrier recovery circuit configured to equalize a digital input ingress signal to generate an equalized ingress signal; a receiver framer configured to frame the equalized ingress signal to generate a framed ingress signal; and a receiver host interface configured to output the framed ingress signal. The receiver host interface is compatible with a framing protocol of the receiver framer.

Single-chip transceiver with electronic dispersion compensation for coherent optical channels

A transceiver for fiber optic communications.

Skew compensation based on equalizer coefficients

Growing community of inventors

Pensacola Beach, FL, United States of America

Shih Cheng Wang