Jan%20Radil,%20Josef%20Vojtech,%20Miroslav%20Kar

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Innovative Devices for Dark Fibre Networks
www.ces.net

• Jan Radil, Josef Vojtech, Miroslav Karásek

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Innovative devices for dark fibre
networksOutline

• Motivations
• Results
• Conclusions

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Innovative devices for dark fibre
networksMotivations

• 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

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Innovative devices for dark fibre networksWhat
is done

• 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

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Innovative devices for dark fibre networksNew
equipment

• 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

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Innovative devices for dark fibre networksNew
equipment tuneable FBGs

• 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

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Innovative devices for dark fibre networksNew
equipment Gires-Tournois etalons

• Not so known as FBGs or DCFs
• Very low insertion loss
• Commercial availability limited
• Important for higher speeds and lightpaths

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Innovative devices for dark fibre networksNew
equipment Optical crossconnect

• 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 design
• Web 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

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Innovative devices for dark fibre networksNew
equipment Optical crossconnect
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Innovative devices for dark fibre networksNew
equipment Optical multicast

• 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 11 to 14
• Again, the basic idea from the CLA design
• Web based management
• User accounts with different privileges
  (configure/check)
• AAA if needed, LDAP
• Time scheduler for sharing of expensive resources
  

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Innovative devices for dark fibre networksNew
equipment Optical multicast
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Innovative devices for dark fibre networksNew
equipment Optical multicast
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Innovative devices for dark fibre networksNew
equipment Conversions/Regenerations

• Based on SOAs
• Can be done with HNLF but high optical powers
  necessary
• 10 Gb/s, tested up to 40 Gb/s RZ signals
• Tested in our lab, more difficult to make a
  black box ready for deployment (polarization
  sensitive, more control elements)

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Innovative devices for dark fibre
networksConclusions I.

• 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_at_GLIF yesterday and the day
  before yesterday
• And in CESNET experimental facility CzechLight
  and network CESNET2

Conclusions
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Innovative devices for dark fibre
networksConclusions II.

• 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

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Innovative devices for dark fibre
networksReferences

• 1 Vojtech, 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 Vojtech, J. CzechLight and CzechLight
  Amplifiers , In 17th TF-NGN Zurich, 2005.

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Innovative devices for dark fibre
networksAcknowledgements

• Lada Altmanová, Jan Gruntorád, Martin Míchal,
  Václav Novák, Stanislav Šíma
• And our new colleagues Jan Nejman and Miloslav
  Hula for all SW related work

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Innovative devices for dark fibre networks
Q A
Thank you for your attention!
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Innovative devices for dark fibre networks