jan radil, josef vojtěch, miroslav karásek innovative devices for dark fibre networks

Jan Radil, Josef Vojtěch, Miroslav Karásek

www.ces.net

Innovative Devices for Dark Fibre Networks

September 19, 2007

4th CEF WorkshopPraha, Czech Republic 2

Innovative devices for dark fibre networks

Outline

Motivations

Results

Conclusions

September 19, 2007


The same old story:-) Utilization of dark fibres – CEF networks (the first DF line lighted in 1999,

2.5 Gb/s PoS)

National Research and Educational Networks (NRENs) rely on leased dark fibres and prefer to have no active components between the transmitter and the receiver

Repeater-less or better Nothing-in-line (NIL) approach

Cost effective deployment of multi-gigabit lines (N x 1 GE, N x 10 GE)

Single fibre bidirectional N x 10 GE transmission

It is time to start to seriously talk about 40 G or even higher speeds (GN2-JRA4, a new NGN workshop, and of course HSSG)

To make these innovative devices ready for deployment


Motivations

September 19, 2007


Optical amplifiers EDFAs

boosters, preamps, inlines, 2in1 Raman

amplification only – extending reach TDM pumped Ramans to suppress transient effects in long

haul DWDM networks

Deployment since May 2004


What is done

September 19, 2007


Tuneable compensators of chromatic dispersion Not only FBG but Gires-Tournois etalons FBG for speeds above 10 Gb/s Up to 160 Gb/s optical signals

Optical crossconnects or switches Clever patchpannels

8 x 8 matrix (1 to 1) With additional features

multicasting (1 to many)

Wavelength convertors and 2R regenerators SOA based


New equipment

September 19, 2007


Based on the CLA design Seems to be a good idea and decision ‚A new peripheral device only‘ Modular, management capabilities, upgrades, redundant

Important for higher speeds and lightpaths


New equipment – tuneable FBGs

September 19, 2007


Not so known as FBGs or DCFs Very low insertion loss Commercial availability limited

Important for higher speeds and lightpaths


New equipment – Gires-Tournois etalons

September 19, 2007


8 x 8 switching matrix (from a commercial vendor) Pretty raw, some interface for NOC folks really needed

Again, the basic idea from the CLA designWeb based management - GUI

User accounts with different privileges (configure/check) AAA if needed, LDAP Time scheduler for sharing of expensive resources

International links (lambdas) Power PCs ‚I would like to get a 10G link from 2 a.m. to 6 a.m. for my

experiments‘ Perhaps the most important thing


New equipment – Optical crossconnect

September 19, 2007



New equipment – Optical crossconnect

September 19, 2007


Different requests GUI useful and perhaps needed

True optical multicast, not SONET/SDH drop and continue or port mirroring known from routers/switches

Protocol agnostic, 1 to many (limited by optical losses but can be compensated for by amplifiers)

Allows combinations of switching and multicasting from 1:1 to 1:4

Again, the basic idea from the CLA designWeb based management

User accounts with different privileges (configure/check) AAA if needed, LDAP Time scheduler for sharing of expensive resources


New equipment – Optical multicast

September 19, 2007




September 19, 2007


Based on SOAs Can be done with HNLF but high optical powers

necessary

10 Gb/s, tested up to 40 Gb/s RZ signalsTested in our lab, more difficult to make a ‚black box‘ ready for deployment (polarization sensitive, more control elements)


New equipment – Conversions/Regenerations

September 19, 2007


As with static DWDM multigigabit links (Brno-Bratislava, Brno-Vienna) you can start to deploy new innovative devices

Our presentation with photos from CEF 2006

It is not fantasy

Used during demos@GLIF yesterday and the day before yesterday

And in CESNET experimental facility CzechLight and network CESNET2


Conclusions I.

Conclusions

September 19, 2007


These innovative devices must be ready for deployment, in other words NOC folks should find most of ‚standard‘ features

If anybody is interested please let us know


Conclusions II.

September 19, 2007


[1] Vojtěch, J. - Karásek, M. - Radil, J. , „All-Optical Chromatic Dispersion Compensation In Long-Haul Transmission Over 225km – With No Inline Amplification “, In: CSN 2007.[2] Petr Holub, Josef Vojtech, Jan Radil, et. al, „ Pure Optical (Photonic) Multicast“, GLIF 2007 Demo, Praha, 2007.

[3] Vojtěch, J. „CzechLight and CzechLight Amplifiers “, In: 17th TF-NGN Zurich, 2005.


References

September 19, 2007


Lada Altmanová, Jan Gruntorád, Martin Míchal, Václav Novák, Stanislav Šíma

And our new colleagues Jan Nejman and Miloslav Hůla for all SW related work


Acknowledgements

September 19, 2007



Thank you for your attention!

Q & A

September 19, 2007



jan radil, josef vojtěch, miroslav karásek innovative devices for dark fibre networks

Documents

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lightpathsinnovative

deploymentinnovative

innovative devices ready

leased dark fibres

optical losses

gbs optical signalsoptical

neededtrue optical multicast