TASKTASKAcademic Computer Academic Computer Center Center

Mścisław Nakonieczny, mnak@task.gda.plSławomir Połomski, sp@task.gda.pl

7 VI 2004 - Gdańsk, Poland

Agenda

ACC TASK xWDM project at TASK

– CWDM– Passive optics: splitters, circulators– Economy of our solution– Future: 10GE, EPON

ACC TASK

Supercomputer Division– 256 Itanium processors based cluster– 128 Xeon cluster, SGI, SUN

Network Division– MAN in Gdańsk region– 140km of fiber optic cables – since

’93 to ’97 – ATM, GE backbone– 50 000 users

Map

140km of own fibers

ATM, GE

TASK’s backbone

AsyncSerial

TPGdy2

BibPAN

UG6

UG14

PRS

UG10

CTM

IMGW

ZIMW

WSM2

IPISD

IMr

ASP

AMG4

UG5

CTO1

IO

AMW

DSAM

AWF

IBW

UG1

IMP

UG4

AMG1

CI TASK

AMuzASP2

IES

MIR

ETI

AMG1

UG17

AMG9

9.6 kbps

SOIE

PG

AM

SZP

DS6UGAMG3

UG3

IMMT

BMTPIG

UG11

CI

AMor3

DS11UG

DS1UG

GWSH

ZSO

BGUG

I LO

AMG7

WSB

WSMSGiP

UG4

Port

WSF

PWR

AMG2

GSR

ZEIEN

Chop

DS11PG

EWŻ

CBM

UG8

DSAMuz

DSUG

Univ BaltVLO

IMr2

GSP

DSAMG AMG1

UG4ck

UG4por

UG6

TPGda

AMuzUG5

CTO1TPWrz

AMG3

ZE

UG1ck

UG10

DS8UG

DS7UG

AMG2DS1UG

IO

PWR

BTC

IMMT

PCK

UG3

AMW

WSM

TPGdy

WEJHEWZ

CI

GSP

WEJH

WSM

TPGdy

IO

UG3

UG2

UG1

CTMTASK

CI

PKP

EXTREME

ETI

AMG1

UG5

SOIE UG16

CTO1

TPWrz

AMG3

DS11UG

AMG2

CI

CI2

DSASP

IBW

AWF

PIONIER

GEANT

USA

CI

GFKM

UG2ck

TASK

UG1

HAAMG

UG2

UG1

KKNJO

KDM

BVI

MIR

MM

BBC

DS2AM

UMSOPOT

UMSop

CKU

WSFiR

IŁ

IMGW

UG7SMuz

DS11PG

UG1CK

UG1fiz

UG1Fiz

UG2zarz

HAUG

UG14

ILO

UG2

UG3

WSM

UG3

RCSS

TPGda

Frankf urt 2.5GbpsPraga 2.5Gbps

PUW3PUW3

622 Mbps

10 Gbps

KOM

PARK

PPTT

WSM

PIT

AWF

DSWSM2

DSAMuz

KOM

IO

DSAWF

KWP

HOTAS

MM

PUW

PUW

CTO1

PROREM

CTO2

UG2

UG2ekon

WSM2

MIR2

WSM2

PIWDS

DS5PG DS2PG

IMP

PIW

UG2pr

POLPAK

UG11

UG1ck

KOSZALIN

OLSZTYN

KOSZALIN

TPSA

WP

AMG1

AMG1

UG2cen

UG2zarz

UG2ekB

UG2zarz

Project WDM at TASK

CWDM Passive optics: splitters, circulators Economy of our solution Future: 10GE, wideband circulator,

EPON

Our goal – multiply fiber strands for a new GE/10GE backbone and schools in access layer

Our pilot CWDM network

SPARE SPARE

GBIC

WEST EAST

1470 1510 1550 1590 1470 1510 1550 1590

MUX/DEMUX-4 MUX/DEMUX-4

ACC TASK

EAST

EAST

EAST

WEST

WEST

WEST

1470nm OADM

1510nm OADM

1550nm OADM Maritime Academy

Univ. of Gdansk

Univ. of Sopot 1470nm GBIC

1550nm GBIC

1510nm GBIC 1510nm GBIC

1470nm GBIC

1550nm GBIC

Passive CWDM

4,8,16 lambdas -

Difficult to integrate ATM&TDM with passive OADM -

Costs -

Support for 10GE ?

Second solution – passive optics

Idea of FBT coupler

Idea of Circulator

What is a FBT coupler ?

FBT - Fused Biconical Taper

FBT coupling ratio

Coupling ratio as a function of pull length for a fused biconical taper coupler made of identical fibres

Fiber optic circulator

A fiber optic circulator is a passive device which transports an optical signal from one port to the next

port, only in one direction (i.e. 1 to 2, or 2 to 3).

Single-fiber bidirectional link

TP3 TP2

Coupler Coupler

Tx2

Rx2 Rx1

Tx1 single fiber

Link reflections

Transceiver Near

(High Power P max )

Transceiver Far

(Low Power P min ) fiber

range L (km)

Reflection due to ODN (far end terminated)

P Rx-signal =P min x Channel Loss

P Rx-reflect =P max x Channel Loss 2

x ORL + P max x ODN

Reflection due ORL

Intenal reflection (outside spec scope)

Channel Loss: Feber attenuation (0.5dB/km x10km) Connector (0.5dBx4)

Link Penalty: MPN and others – 3dB allotment

ODN – Optical Distribution Network

TASK’s access link realization

POP CWDM

1310 bidirectional

coupler coupler End User

One fiber

using standard 50/50 wideband couplers

TASK’s access link realization

using standard 50/50 and WDM couplers and two bidirectional transmissions within a single fiber

One fiber1310/1550

User 1(1310nm)

User 2(1550nm)

1550

1310

1550

1310

1310/1550

1310

1550

1310/1550

bidirectional

WidebandCoupler

50/50

1310

1550

WDMCoupler

1310/1550

1310/1550

1310/1550WidebandCoupler

50/50

WDMCoupler

1310/1550

WDMCoupler

1310/1550

WDMCoupler

1310/1550

Our handmade FBT WDM

Comparison of costs CWDM & FBT

CWDM4 lambdas MUX/DEMUX 4 channel 2800

Coloured GBICs 160004700 €/line

FBT2 lines Access line 1

2 std. couplers + 2 GBICs 360 €/line

2 lines / 2 lambdas Access line 2User12 WDM couplers + 2 GBICs 540User22 WDM couplers + 2 GBICs 1550nm 28402 std. couplers 240

1810 €/line

EPON downstream

EPON upstream

Summary

Single fiber solutions based on passive optics multiply capacity of optics layer and are very cost attractive

Links

ACC TASKhttp://www.task.gda.pl

Ethernet in the First Mile IEEE802.3ah Study grouphttp://www.ieee802.org/3/efm/index.html

Thank YouThank You