SAFARI ProjectScalable and Flexible optical Architecture for Reconfigurable Infrastructure

1

October 14th 2015

Technical University of Denmark Coordinator (EU) Toshio MoriokaNTT Corporation Coordinator (JP) Yutaka Miyamoto

1980 1990 2000 2010 2020

Year2030

：Research★

：Commercial system

★ElectricalTDM

★

★WDM &

Optical

Amplification

★★

100 M

1 G

10 G

100 G

1T

10 T

100 T

1 P

Cap

acit

y p

er

fib

re[b

/s]

10 P

10 M

Demand for Scalable Optical Transport Network

★

★

★★★

Digital Coherent

Transport 20 T/fibre

400G/ch.

8T/fibre

100G/ch.

Digital coherent transport realizes high spectral efficiency and high sensitivity

thanks to massive digital signal processing in optical communication.

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International standardisation of Flexible Grid andthe first application to 400 Gbps transport over OTN

Japan has contributed significantly to

the standardisation of flexible grid

in ITU-T SG15

High capacity based on multicarriers

and variable modulation format

Variable bandwidth (Freq. Slot)

⇒N x 6.25 GHz

The anchor frequency (the same)

⇒193.1 THz （1552.52 nm)

Future WDM network

68.75 GHzFreq.

50 GHz

100G

8 slots11 slots

QAM: Quadrature Amplitude Modulation

400G super channel

(16QAM x 2subcarriers）

High speed single carrier signal

Fixed Frequency Grid:

⇒N x 12.5 GHz

The anchor frequency (the same)

⇒193.1 THz （1552.52 nm)

100G

（QPSK）

50 GHz 50 GHz50 GHz

100G

（QPSK） 40G

Today’s WDM network

Freq.

40G

3

1980 1990 2000 2010 2020

Year2030

：Research (without SDM)★

：Commercial system in NTT

★ ：Research (with SDM)

★ElectricalTDM

★

★WDM &

Optical

Amplification

★★

★

100 M

1 G

10 G

100 G

1T

10 T

100 T

1 P

Cap

acit

y p

er

fib

re[b

/s]

10 P

10 M

PhysicalLimit ofConventional fibre

Fibre-Launched Power Limit

Nonlinear Shannon Limit

★

★★★

Digital Coherent

Transport20 T/fibre

400G/ch.

Demand for Scalable Optical Transport Network

8T/fibre

100G/ch.

★★

★★

Scalable Technologies for

future OTN needed

4

5

Few mode fiber（FMF）・ Single core

・ Few modes (M) at

the same wavelength

Multi core fiber（MCF）・ Multi core (N)

・ Single mode

Fundamental mode

Higher order mode

Conventional fiber (SMF)・ Single core・ Single mode

What is space division multiplexing (SDM)

In optical fiber communication ?

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To keep the optical signal power density in SMF…

Capacity scaling:

M X N ～ 100

for M = 10 and N =10

Trade off between core number and inter-core crosstalk under limited cladding diameter

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10 20 100

-50

-30

-20

0

Inte

r-co

re c

rossta

lk a

fter

1000 k

m(d

B)

SDM multiplicity (Core number of MCF)

NxM=7x1

7

-40

-10

16QAM

QPSK

32QAM64QAM

8QAM

Allowable XT

for each modulation format

2 50

NxM=12x1

NxM=19x1

30

DSDM:

Dense Space Division Multiplexing

（SDM mulitiplicity: 30～100）

Target

Of SAFARI

Inter core crosstalk

(N =7)

＜250mm

Overview of the SAFARI project

SDN Controller

Openflow/SDN extension for novel programmability

Interface implementation for novel programmabilityEMS

Multicore Erbium-Doped Fibre Amplifier

(MC-EDFA)

High Core Count Single Mode Multicore Fibre

(HCC-SM-MCF)

High Core Count Single Mode Multicore Fibre

(HCC-SM-MCF)

DSP ・・・・・・

・・・Tx Rx DSP

Low-power pump

Multicore fibre

SMF

MMF

EMS：Element Management SystemSDN：Software Defined Network7

EU and Japan collaborations on the SAFARI project (Scalable and Flexible optical Architecture for Reconfigurable Infrastructure)

Space Division Multiplexing (SDM)

(SDM multiplicity)

Programmable Signal Bandwidth

(subcarrier numbers)

Scalable Optical Transport Network (OTN)

with Manageable Flexibility Control

Programmable Spectral Efficiency

(modulation formats)

EU team

- Technical Univ. of Denmark

(DTU) Toshio Morioka

- Southampton Univ.

(UOS) David Richardson

- Coriant R&D GmbH

(COR) Marc Bohn

Japan team

- Nippon Telegraph and

Telephone Corporation

(NTT) Yutaka Miyamoto

- Fujikura Ltd.

(FUJ) Shoichiro Matsuo

Network control of programmable function

Interworking functions for programmable control

Design and verification of programmable function

Design and system verification of SDM systems

Detail design and fabrication of multicore fibre

Design and fabrication of Multicore fibre amplifiers

Testbed verification

DTU UOS COR NTT FUJ

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Working package structure

9

EMS

SDN Controller

Openflow/SDN extension for novel programmability

Interface implementation for novel programmability

WP3 Programmable optical hardware

Programmability utilization design for scalable network provisioning

Scalable control of carrier network with an optimum degree of programmability

Interworking between SDN and Physical LayerAbstraction of information from

programmable elements and the fiber links and implementation of intermediate layer

Emerging programmable functions of L0/L1Develop and verify various flexible features of

programmable optical hardware including carrier-number, modulation format etc.

Verification and establishment of a control scheme for optical transportprogrammability beyond 400 Gb/s

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WP4 Super capacity optical transport networks

TDM/WDM TDM/WDM/SDM

SDM-

MUX

WDM-

MUX

Multicore

EDFA

SDM-

DEMUXCh.1

Ch.n

Ch.

1

Ch.m

Ch.1

Ch.n

Multicore

fibre

Txs Rxs

Sig

nal

pro

cessin

g

Investigation and development of MCF-based SDM technologies withhigh core counts (≧30) toward super-capacity optical transport networks

Single-mode multicore fibre

・・・

Multicore

fibre

• Multicore fibres

• Multicore EDFA

• Signal processing for SDM

Sig

nal

pro

cessin

g

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WP3Programmable Optical Hardware

WP4Super high capacity OTN

SAFARI project

WP5 Testbed

2014 2015 2016YEAR 2017

PJ Start PJ End

WP5Testbed

Joint Testbed @ Coriant

MCF Testbed@NTT(test1) (test2)

Interwork Testbed＠NTT / Coriant

The core technologies in WP3 and WP4 for future scalable OTNare combined to be tested in the testbed of WP5

Oct. Sept.

Review Review Review

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Summary

Impact on society (commercialisation and standardisation)◆ High speed digital signal processing technologies at more than 400G and SDN-

based control technologies offering flexible functionality is the key for future OTN

◆ Capacity scaling of super channels is expected through various combinations of

wavelength division and space division multiplexing for channel capacities beyond 400 Gbps

Technical feasibility◆ EU team is a world leader in SDN-controlled transport layer systems

◆ Japan team is a world leader in real-time high-speed DSP-ASICs

◆ Japan team has world leading expertise in MCF transmission technology

◆ EU team has world leading expertise in SDM optical amplification technology

Advantages of EU-Japan collaboration◆ Sharing technical roadmap on the evolution for managing flexibility in future

scalable OTN

◆ Proposal of international standards for future interoperability through wide-scope

open innovation based on the world leading technologies from the EU and Japan

Significance of EU-Japan R&D collaboration

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Reference

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Cladding Pumped Fibre Devices

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