Infinera Corporation

Infiriera Corporation

Hewlett-packard Company

Influera Corporation

Jafari, Amir

Osman, Mohamed

Hand, Steven Joseph

Welch, David F.

Wu, Kuang-tsan

Steven Joseph Hand

Kuang-Tsan Wu

Jeffrey Thomas Rahn

David F Welch

Han Henry Sun

Mohamed Osman

Amir Jafari

Rajan Rao

Vasudha Bhaskara

Rajasekar Venkatesan

Jayaram Hanumanthappa

Vincent G Dominic

Daniel P Murphy

Prasad Paranjape

Paul Nathan Freeman

Tulasi Veguru

Maneesh Jain

Luis A Perez

Ahmed Awadala

Biao Lu

Alan C Nilsson

Robert B Taylor

Matthew L Mitchell

Sharfuddin Syed

Mohit Misra

Sriram Subramanian

Iftekhar Hussain

How Tung Lim

Atul Saxena

Marco Sosa

Dharmendra Naik

Abhinava Shivakumar Sadasivarao

Kiran Kumar Dintakurthi

Shyamtanu Majumder

Christopher Liou

Anthony Jorgenson

John C Santon

Abhijeet D Deore

Chris Liou

Yashpal Kumar

Mats Plantare

Konstantin Saunichev

Sudhindra Aithal Kota

Naresh Kumar

Paul Gavrilovic

Karthikeyan Mathruboodham Nagarajan

Pydi Kasi Viswanadham

Sudhanshu Verma

Michael Frendo

Kenneth R Nielsen

Onur Turkcu

Anders Wikman

Geetha Chandu

Manish Chandra

Nitin K Goel

Naresh Srinivasulu Jayam

Arijit Mandal

Josué Kuri

Gounda Mohammed Nabi Saheb

Kasi Pydi Viswanadham

Alok Jain

Kiran Dintakurthi

Christen M Armbrust

Pankaj B Shah

Jeng Rong Yeh

Disclosed herein are methods and systems for routing traffic. One exemplary system includes a muxponder module deployed in an optical network, the muxponder having an optical receiver, a first and second electrical port, a demultiplexer having a built-in digital cross-connect, and a processor accessing a first calculated carrier frequency to assign traffic streams associated with a first service identification code to a first and second host lane of the first electrical port, and a second calculated carrier frequency to assign traffic streams associated with a second service identification code to a third and fourth host lane of the second electrical port, and having logic to control the digital cross-connect to route a first and a second traffic stream to the first electrical port based on the first service identification code, and a third and a fourth traffic stream to the second electrical port based on the second service identification code.

Systems and methods for enabling point-to-multi-point applications in common management interface specification

A network or system in which a hub or primary node may communicate with a plurality of leaf or secondary nodes. The hub node may operate or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed to receive data carrying optical signals from, and supply data carrying optical signals to, the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include one or more spans or segments of optical fibers, optical amplifiers, optical splitters/combiners, and optical add/drop multiplexer, for example. Optical subcarriers may be transmitted over such connections, each carrying a data stream. The subcarriers may be generated by a combination of a laser and a modulator, such that multiple lasers and modulators are not required, and costs may be reduced. As the bandwidth or capacity requirements of the leaf nodes change, the number of subcarriers, and thus the amount of data provided to each node, may be changed accordingly. Each subcarrier within a dedicated group of subcarriers may carry OAM or control channel information to a corresponding leaf node, and such information may be used by the leaf node to configure the leaf node to have a desired bandwidth or capacity.

Frequency division multiple access optical subcarriers

An example node includes a receiver, a switch circuit, and a transmitter. The receiver is configured to receive a first modulated optical signal including a first plurality of optical subcarriers, and supply a plurality of data streams based on the first plurality of optical subcarriers. Each of the data streams is associated with a corresponding one of the plurality of optical subcarriers. The switch circuit is configured to receive the data streams, and supply the data streams to a plurality of switch outputs. The transmitter is configured to receive the data streams, and supply a second modulated optical signal based on the data streams. The second modulated optical signal carries a second plurality of optical subcarriers. Each of the second plurality of optical subcarriers is associated with a corresponding one of the data streams.

Dynamically switching queueing schemes for network switches

Optical network systems are disclosed, including systems having transmitters with a digital signal processor comprising forward error correction circuitry that provides encoded first electrical signals based on input data; and power adjusting circuitry that receives second electrical signals indicative of the first electrical signals, the power adjusting circuitry supplying third electrical signals, wherein each of the third electrical signals is indicative of an optical power level of a corresponding to one of a plurality of optical subcarriers output from an optical transmitter.

Apparatuses and methods for digital subcarrier parameter modifications for optical communication networks

An example method is performed by a terrestrial control system communicatively coupled to a constellation of satellites. According to the method, instructions are transmitted to a first satellite of the constellation to transmit a plurality of first groups of optical subcarriers to a plurality of second satellites of the constellation via free-space optical communication. The first groups of optical subcarriers carry first data and each of the first groups of optical subcarriers is associated, respectively, with a different communications module of the second satellites. Further, instructions are transmitted to the second satellites to transmit a plurality of second optical subcarriers to the first satellite via free-space optical communication. The second groups of optical subcarriers carry second data and each of the second groups of optical subcarriers is associated, respectively, with a different communications module of the second satellites.

Transmitting and receiving data using a satellite communications network

Clock recovery for subcarriers in optical networks

A transmitter can include a laser operable to output an optical signal; a digital signal processor operable to receive user data and provide electrical signals based on the data; and a modulator operable to modulate the optical signal to provide optical subcarriers based on the electrical signals. A first one of the subcarriers carriers carries first TDMA encoded information and second TDMA encoded information, such that the first TDMA encoded information is indicative of a first portion of the data and is carried by the first one of the subcarriers during a first time slot, and the second TDMA encoded information is indicative of a second portion of the data and is carried by the first one of the subcarriers during a second time slot. The first TDMA encoded information is associated with a first node remote from the transmitter and the second TDMA encoded information is associated with a second node remote from the transmitter. A second one of the subcarriers carries third information that is not TDMA encoded, the third information being associated with a third node remote from the transmitter. A receiver and system also are described.

Time division multiple access optical subcarriers

Optical network systems and components are disclosed, including a transmitter comprising a digital signal processor that receives data; circuitry that generate a plurality of electrical signals based on the data; a plurality of filters, each of which receiving a corresponding one of the plurality of electrical signals, a plurality of roll-off factors being associated with a respective one of the plurality of filters; a plurality of DACs that receive outputs from the digital signal processor, the outputs being indicative of outputs from the plurality of filters; a laser that supplies light; and a modulator that receives the light and outputs from the DACs, and supplies a plurality of optical subcarriers based on the outputs, such that one of the optical subcarriers has a frequency bandwidth that is wider than remaining ones of the optical subcarriers, said one of the optical subcarriers carrying information for clock recovery.

Clock recovery for digital subcarriers for optical networks

Consistent with the present disclosure, a local oscillator is provided in a receiver. The local oscillator laser a first and second mirrors and phase section and heaters are provided adjacent each portion of the laser, such that the temperature and thus the frequency of light output from the local oscillator laser may be tuned. Applying electrical power, such as a current or voltage to the phase section may result in rapid frequency tuning of light output from the local oscillator laser but over a limited frequency range. Temperature changes to the mirror sections, however, may afford frequency tuning over a wider range, but frequency tuning the mirror sections requires more time than that required to tune the phase section. Consistent with the present disclosure, a tuning method and apparatus is provided that optimizes laser tuning by selectively tuning the phase and mirror sections.

Fast scan method and apparatus for beacon auto-tune

An example system includes a first network device having first circuitry. The first network device is configured to perform operations including receiving data to be transmitted to a second network device over an optical communications network, and transmitting first information and second information to the second device. The first information is indicative of the data, and is transmitted using a first communications link of the optical communications network and using a first subset of optical subcarriers. The second information is indicative of the data, and is transmitted using a second communications link of the optical communications network and using a second subset of optical subcarriers. The first subset of optical subcarriers is different from the second subset of optical subcarriers.

Optical subcarrier dual-path protection and restoration for optical communications networks

Methods, systems, and apparatus for subcarrier modulation with radio frequency inphase-quadrature (IQ) modulators. A system includes a plurality of IQ modulators, each configured to receive an input electrical signal comprising an inphase signal and a quadrature signal, and each configured to modulate the inphase signal and quadrature signal based on one of a plurality of local oscillator signals to output a multiplexed signal. Each of the plurality of local oscillator signals is supplied by a respective one of a plurality of local oscillator circuits. A modulator circuit is configured to modulate a carrier optical signal from a laser having a frequency ωbased on the multiplexed signal to generate a modulated optical signal centered at frequency ωand comprising a plurality of subcarriers. A center frequency of each of the plurality of subcarriers is offset from ωby a frequency of said one of the plurality of local oscillator signals.

Subcarrier modulation with radio frequency (RF) IQ modulators

Growing community of inventors

Los Gatos, CA, United States of America

Steven Joseph Hand