Advances in Optical Networking in Coherent, Super-Channels and the Value of Integrated Switching

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    1 | Infinera Confidential & Proprietary

    Advances in Optical Networking:Coherent, Super-Channels and the

    Value of Integrated Switching

    Steve Pegg, Infinera

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    Agenda:

    The Key To Network Flexibility

    Fibre Capacity

    Operational Scale

    Network Efficiency

    Fibre Capacity

    Operational Scale

    Network Efficiency

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    What is Coherent and what does it deliver?

    Coherent Technologies

    Advanced Modulation

    Polarization Multiplexing

    Coherent Detection

    Advanced

    Digital Signal Processing The same or better reach!

    Before

    Coherent

    C-Band

    80 Channels@10Gb/s

    800Gb/s

    100G

    Coherent

    C-Band80 Channels@100Gb/s

    8Tb/s

    Super-Channel

    Coherent

    C-Band

    Gridless9.5Tb/s

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    Modulation Normalized Reach C-Band Capacity Application

    PM-BPSK 5000 km 5Tb/s Subsea

    PM-QPSK 3000 km 10Tb/s Long-Haul

    PM-16QAM 500 km 20Tb/s Metro

    There is no single, correct coherent modulation:

    FlexCoherent: Optimizing Spectral Efficiency vs. Reach

    Reach Capacity

    Etc.Etc.

    PM-QPSKPM-QPSK PM-16QAMPM-16QAM

    PM-BPSKPM-BPSK

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    Is Photonic Integration Important at 100G?Component cost breakdown for 100G co-PM-QPSK Transponder

    DSP + FEC

    11%

    Optical Components55%

    Other Components

    34%

    Photonic integration offers significant benefits at 100G and beyond!

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    Agenda:

    The Key To Network Flexibility

    Fibre Capacity

    Operational Scale

    Network Efficiency

    Fibre Capacity

    Operational Scale

    Network Efficiency

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    100G Line Card

    100G Line Card

    100G Line Card

    100G Line Card

    100G Line Card

    100G Line Card

    100G Line Card

    100G Line Card

    100G Line Card

    100G Line Card

    One way to bring 1Tb/s into service

    Bulky

    Power-hungry

    Does not scale operationally

    http://localhost/var/www/apps/conversion/tmp/scratch_3//upload.wikimedia.org/wikipedia/commons/3/37/Clock.gif
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    Super-Channels Solve the Problem of Operational Scale

    Line

    Card

    A super-channel

    implements multiplecarriers - ideally in a

    single line card

    It has excellentoptical performance

    All carriers are

    provisioned in a single

    operational cycle

    And is seen as a

    single unit of capacity

    by the services that use it

    Itspractical

    to build

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    10 Lasers

    40 modulators32GBaud electronics

    Photonic ICs

    Time to Market: ~2 years

    375 GHz375 GHz

    2 Lasers

    8 modulators160Gbaud electronics

    ~16nm Silicon

    Time to Market: ~7 years

    1 Tb/s PM-QPSK

    375 GHz

    1 Laser

    4 modulators320Gbaud electronics

    ~ 11 nm Silicon

    Time to Market: ~10 years

    Why do we need multi-carriersuper-channels?

    C Band

    Must be spectrally efficient, andpossible to manufacture

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    1 Tb/s in a single line card

    AOFX-1000-T8-1-C8

    FC1-4/1-6/1-8

    Large Scale PICs: Optimal for Super-Channels

    The most Practical Approachfor Coherent Super-Channels

    1T RX PIC

    1T TX PIC

    10 channels of Tx

    10 channels of Rx

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    Rahn, J.; Sun, H.; Wu, K.T.; Basch, B.E. IEEE Journal of Lightwave Technology, 2012, Issue 99:

    Real-Time PMD Tolerance Measurements of a PIC Based 500Gb/s Coherent Optical Modem

    500G Tx Module 500G Rx Module

    Industry leading performance

    Peak PMD tolerance to 500ps

    Tolerant to high speed PMD transients

    Constellation diagrams

    World Record PMD Compensation Performance

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    Agenda:

    The Key To Network Flexibility

    Fibre Capacity

    Operational Scale

    Network Efficiency

    Fibre Capacity

    Operational Scale

    Network Efficiency

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    IEEE HSSG

    What will the next data rate be?

    Transport

    Platform

    Ethernet Data Rates

    1GbE

    10GbE

    40GbE

    100GbE

    ???

    Other Services

    FiberChannel

    SONET/SDH

    Video Services

    Custom R&E traffic

    Client Side Line SideSuper-Channel Data Rates

    1Tb/s (10C-PM-QPSK)

    500Gb/s (10C-PM-QPSK)

    400Gb/s (DC-PM-16QAM)

    250Gb/s (10C-PM-BPSK)

    200Gb/s (DC-PM-QPSK)

    100Gb/s (DC-PM-BPSK)

    OTN Container Sizes (approx)

    ODU0 1.25Gb/s

    ODU1 2.5Gb/s

    ODU2 10Gb/s

    ODU3 40Gb/s

    ODU4 100Gb/s

    ODU???

    Super-channel modulation has to beflexible(eg. FlexCoherent),

    so OTN container size must beflexibletoo (OTUadapt)

    OTUadaptITU-T SG15

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    Majority of client services

    remain at 10G or less

    100G services are emerging,

    but represent mostly core

    network needs

    What the services mix tells usMore switching required for lower speed services

    Sub 10G

    10G

    40G

    100G

    Majority of the

    Client/Service Demands

    remain 10G

    (Source: Ovum, 2012)

    Client Port Mix (2017)

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    Problem Statement

    What is the most efficient way to

    build the next gen network

    Key findings:

    Muxponders & Separate switching

    are too complex & costly

    Integrated OTN switching is a musthave

    The architectural choices are clear

    WDM only(Muxponders)

    WDM + Stand-alone Switch

    Integrated WDM + Switch

    Photonic IC

    based

    Non PIC-based

    Architectural Options

    Switching refers to OTN Switching

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    Integrated Switching is Clearly Advantageous

    Example is for single100G wave: Imagine 80x this!

    50%

    100G wave with

    5 x 10G services

    40 %

    100G wave with

    4 x 10G services90%

    Efficiently filled

    100G wave

    Manual patches result

    in operational

    inflexibility

    Fibre

    direction #1

    Fibre

    direction #2

    Fibre

    direction #3

    CapEx penalty of stand-

    alone switch

    OpEx penalty of extra

    space/power

    CapEx penalty of

    multiple 10G inter-

    connect between

    Switch and WDM

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    Integrated Switch + PIC-based WDMis even better

    100G wave with

    5 x 10G services

    W

    Fibre

    direction #3

    Efficiently filled

    100G wave

    Fibre

    direction #1

    50%

    Fibre

    direction #240 %

    100G wave with

    4 x 10G services90%

    Eliminate

    Interconnects

    Reduce

    Space/Power

    Eliminate Separate

    Switch

    Automate

    Connections

    Compare PIC-based platform to discrete optical implementations

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    18 | Infinera Confidential & Proprietary

    Agenda:

    The Key To Network Flexibility

    Fibre Capacity

    Operational Scale

    Network Efficiency

    Fibre Capacity

    Operational Scale

    Network Efficiency

    Large Scale PICsare the critical enabling technology

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    Thank You!Steve Pegg

    [email protected]