100G+ Optical Transport
network technology

November 6th 2014
Taichi Kogure
Senior Systems Engineer,Core Systems & Network Engineering

Agendaイーサネット装置における売上高の推移
10GbEは新しい1GbE、100GbEは新しい10GbE
売上（正規化値）

1GbE

10GbE

40GbE

100GbE

1.000
0.875
10GbEアグリゲーションと100GbE UNIサービスによる立ち上がりつつある100GbE需要

0.750
0.625
0.500

圧倒的なシェアを占め始めている10GbE

0.375
0.250

1GbEは10GbEへの置き換えにより売上が急速に縮小

0.125
0.000
2006

2007

2008

2009

2010

出典： 「Service Provider Ports & Switches」2013年11月（Infonetics）

2011

2012

2013

2014

2015

2016

2017

コア・メトロ領域における100G+の導入計画
200G, 400G, 1Tは現実に

Speeds and Modulations comparison 2014 versus 2017
N=31

N=31

New Core deployment

New Metro deployment

Source: Infonetics, “100G+ and ROADM Strategies, Global Service Provider Survey,” September 18, 2014

AgendaProgrammable Hardware Enabling Broad Solution Set
SINGLE CHIPSETMULTIPLE APPLICATIONSFASTER SERVICEACTIVATION

Debut on Sep, 2012

WaveLogic 3 Flex2
Released on Dec, 2012

WaveLogic 3 Flex3
Shipping this Quarter

DSP Chipset features

Drive Table

Soft FEC
Encoder

Clientcircuit

Non-Linear
Table

TX DSP

DSP

DAC
DAC

LineOptics

DAC
DAC

Control, optimization & calibration~ 22M Gates (DSP: 20M, DAC: 2M)

TX module

RX DSP
MIMO

ADC
ADC

Hyx
HxyCarrier
recovery

ADC

Clientcircuit

Hxx

ADC
CD filter

LineOptics

Soft FEC
Decoder

HyyControl, optimization & calibration

150M Gates (32 nm CMOS, 70 Tops/s, 3.7 km wire)

RX DSP chip layout

288 mm (H) x 25 mm (W) x 237 mm (D)Spectral shaping enablingu

Minimize spectral utilization for increasing spectral efficiencyu

DAC technology enables this functionality
0Spectrum
70 GHz BW
50 GHz Channel-10

Amplitude [dB]

-20Time Domain-30-40-50-60-70-150-100-500Frequency [GHz]50Frequency Domain

100150Linear distortion tolerance
Chromatic Dispersion tolerance

100G Flex3~300,000 ps/nm

Transmitted

After Dispersion

Polarization Mode Dispersion tolerance

100G Flex3150 ps (mean)Flexible Latency Soft FEC

Q-FEC
TX + RX
Including Q-FEC

100G400G

4 - 35 µs

2 - 18 µs

8 - 42 µs

5 - 25 µs

Q-FEC is flexible• Latency is provisionable (out of service)• Allows tradeoff between performance and latency

Typical Reach with 100G DP-QPSK on Terrestrial link
30- ITU-T G.652 fiber- 80 km span with 21 dB span loss
- 88 wavelengths on 50 GHz grid

OSNR (dB)

252015margin10.2 dB B-B

1001000

2000

3000

Distance (km)

4000

5000

Typical Reach on Legacy Submarine link (DMF)
20- Dispersion Managed Fibers- Typical Submarine wet-plant design- 88 wavelengths on 50 GHz grid

Required
OSNR (16QAM)OSNR (dB)

15margin

10margin

7.03 dB B-B

502000

4000

6000

8000

Distance (km)

10000

12000

14000

16000

Typical Reach on 100G+ modulation

Constellation per carrier
Example Shown:• 21 dB per span
• Hybrid Raman/EDFA amplifier• 19 Tb/s

Spectrum (Dual carriers)
Fiber Type

Spans

ReachStandard SMF

161,275 km

SMF-28 ULL

141,660 km

EX2000172,000 km

VERIZONSPRINT

BRITISHTELECOM

JAPAN USCABLE
NETWORK

2.5x Increase in Spectral Efficiency
Ashburn (Washington, DC)

Charlotte
1Tb/s

1Tb/s

Terabit SuperChannel
Flexible grid ROADM
Colorless Filters

100GE

10 Spans ~1000kms eLEAF
1st Deployment of
Next Generation
Hybrid Raman Line System
Live 10G/40G/100G (1Tb/s)
Traffic

Terabit SuperChannel
Flexible grid ROADM
Colorless Filters

100GE

RouterRouter• Live Comcast Traffic over a single 1Tb/s SuperChannel wavelength• 5x16QAM 200GHz SuperChannel, operating on anext gen line system comprised of smart Raman,
programmable EDFA & flexible grid ROADM• 1Tb/s, 200GHz SuperChannel operates alongside
10G, 40G, and 100G wavelengths running
production traffic• 10 spans, eLEAF fiber, ~ 1000 km !

1Tbps

AgendaStandard modulation:

X-pol

DP-BPSK, DP-QPSK,
DP-16QAM, etc.

Y-pol

4-Dimensional
modulation:

X-polPol. Switched -QPSK, etc.

Y-pol

Symbol 1Symbol 2

𝑋𝑋𝐼𝐼 , 𝑋𝑋𝑄𝑄

𝑋𝑋𝐼𝐼 , 𝑋𝑋𝑄𝑄Symbol 1Symbol 2𝑋𝑋𝐼𝐼
𝑋𝑋𝑄𝑄
𝑌𝑌𝐼𝐼
𝑌𝑌𝑄𝑄

𝑋𝑋𝐼𝐼
𝑋𝑋𝑄𝑄
𝑌𝑌𝐼𝐼
𝑌𝑌𝑄𝑄

𝑌𝑌𝐼𝐼 , 𝑌𝑌𝑄𝑄

SymbolInterval 1

8-Dimensional
modulation

X-polY-pol

𝑌𝑌𝐼𝐼 , 𝑌𝑌𝑄𝑄

𝑋𝑋𝐼𝐼1𝑋𝑋𝑄𝑄𝑄
𝑌𝑌𝐼𝐼1
𝑌𝑌𝑄𝑄𝑄

Bits encoded/decoded
independently on eachdimension.

Symbols encoded across4 optical dimensions.
Increases Euclidean
distance.

Interval 2𝑋𝑋𝐼𝐼𝐼
𝑋𝑋𝑄𝑄𝑄
𝑌𝑌𝐼𝐼𝐼
𝑌𝑌𝑄𝑄𝑄

Symbols encoded acrossthe 4 optical dimensions of
two signaling intervals.

<Simulation Conditions>• 5 Channel propagation• 50 GHz channel spacing• 20 x 80 km spans
90% compensated ELEAF• 28 GSymb/s• 42 GHz Optical Filter

A. D. Shiner, et al., “Demonstration of an 8-dimensional modulation format with reduced inter-channel nonlinearities in apolarization multiplexed coherent system,” Opt. Exp., Vol. 22, No. 17, 2014

2.2 dB<Simulation Conditions>• 5 Channel propagation• 50 GHz channel spacing• 20 x 80 km spans
90% compensated ELEAF• 28 GSymb/s• 42 GHz Optical Filter37.5 GHZ

1.0 dB

Agenda100G density and power
improvements

IntegrationofTx and Rx DSP
into a single ASIC

Tx/Rx Electro-Optics•Smaller form-factor for higher faceplate density•

Lower electrical power consumption•

Same Tx spectral shaping•

Same Rx coherent detection DSP•

Same PMD compensation: 150ps mean DGD•Same unmatched soft FEC; at lower power•

Optimized modulation format for 100G metro/regional•

Chromatic dispersion compensation scaled to metro/regional•

New, smaller electro-optics

Ciena lead editor

Pluggable
integrated opticalcomponent

Partitions optics
and DSP

Density
Pluggable
Supply chain•

Tunable laser•

Coherent optical modulator•

Coherent receiver•

Coherent DSP engines on the Host board; electro-optic conversion
functions within pluggable Analog Coherent Optics module•

Optimal thermal management for both optics and DSP•

Allows innovation & competition across electro-optics technologies•

Enables highest possible modem faceplate density for applications
requiring more than two 100G coherent line ports•

Pay as you grow: addresses first-in install costs in multi-port line cards•

Flexibility: allows selection of best-fit optical solution per application•

Reliability: hot pluggable replacement in the event of failure•

Multiple vendors; large industry ecosystem

AgendaConstellation
Multiplicity

Symbol Rate
WL1 WL2

Subcarrier
Multiplicity

WL3

WL4

Target 400G config (future)

Possible
In-service
Upgrade“Pay as yougrow” model

100G DC DP-BPSK

100G DP-QPSK

200G DP-16QAM

400G DC DP-16QAM

àà

16QAM performance: 800-1000km without Raman, 1300km+ w/ Raman
Double the capacity over same spectrum in more locations à no Regens required

100GDP-QPSK

400G Today

400G Phase II

400G Phase III

100G DP-QPSK

200G DP-16QAM

400G DC DP-16QAM superchannel

Fixed200G
16QAMFixed200G
16QAM

CDC+Flexible
gird

400G using 100G carriers

400G Phase 1

400G Phase II

88 x100G Waves @ 50GHz

88 x 200G Waves @ 50GHz

64 x 400G Superchannel@ 75GHz, flexible grid4 channels for 400Gb/s

2 channels

Superchannel

8.8T, 200GHz, SE 2.0 b/s/Hz

17.6T, 100GHz, SE 4.0 b/s/Hz

25.6T, 75GHz , SE 5.33 b/s/Hz> 3,000km

800-1400km

700-1300km

WaveLogic 3 200G (DP-16QAM) mode doubles capacity and spectral efficiency.
Flexible grid tuning (future) allows for additional spectral efficiency improvements.

10 subcarriers x 200 Gb/s (DP-16QAM)∆f: 40 GHz
Bandwidth occupancy: 400 GHz
Spectral Efficiency: 5.0 b/s/Hz
Measured spectrum of 2 Tb/s signal

ご清聴ありがとうございました。