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April 19-21, 2004 Internet 2 member meeting,
Arlington, Virginia 1
Experiments with 10 GE long-haul transmissions in academic and research
networks
Jan Radil Miroslav Karásek
www.cesnet.cz
Spring 2004 Internet2 Member Meeting, Arlington, Virginia
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 2
Experiments with 10 GE long-haul transmissions in academic and research networks
Outline
Motivation for extending the span lengthNumerical simulations Practical results Conclusions
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 3
Experiments with 10 GE long-haul transmissions in academic and research networks
Motivations
Nothing-in-line (NIL) approachDrawback and problems with in-line amplifiers (EFDAs, Raman)Electric power supplies Increase the probability of network breakdown Regular maintenance in remote sites1 GE and 10 GE everywhere
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 4
Experiments with 10 GE long-haul transmissions in academic and research networks
Numerical simulations
To estimate the maximum span length @10Gbit/s with G.652 SSMFOptiSystemArtisOptimization of input powers (EDFA, Raman) and dispersion compensation ratio
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 5
Experiments with 10 GE long-haul transmissions in academic and research networks
Practical results
2 x 1 GE plus 2 x 10 GE over 202 km 2 x 10 GE over 252 kmHigh power EDFA boostersLow noise EDFA pramplifiersHigh power Raman pump lasersDispersion compensating fibresSplitters, optical tunable filters (no DWDM equipment)BER = 10-13
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 6
Experiments with 10 GE long-haul transmissions in academic and research networks
Practical results – 4 WDM channels
2 x 1 GE plus 2 x 10 GE over 202 km
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 7
Experiments with 10 GE long-haul transmissions in academic and research networks
Practical results – 2 WDM channels
2 x 10 GE over 252 km
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 8
Experiments with 10 GE long-haul transmissions in academic and research networks
Practical results – the map of Czech republic
Air distancesCorrections neededAir to fibre distance ratio – AFDRAFDR = 0,65 (worst case for Praha-Brno fibre: 190 km/290 km)
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 9
Experiments with 10 GE long-haul transmissions in academic and research networks
Practical results – the map of Czech republic
Corrected diametersCzechLight experimental network
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 10
Experiments with 10 GE long-haul transmissions in academic and research networks
Practical results – the map of Netherlands
Air distancesAFDR can be different
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 11
Experiments with 10 GE long-haul transmissions in academic and research networks
Practical results – the map of Virginia
Air distances
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 12
Experiments with 10 GE long-haul transmissions in academic and research networks
Conclusions
WDM 10 GE long haul NIL transmissions (easy to deploy with dark fibres, cost-effective)For experimental networks (CzechLight)Bandwidth on demand (real lightpaths) for clusters/grid usersOptical services to new end users (high-speed, few-to-few)
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 13
Experiments with 10 GE long-haul transmissions in academic and research networks
Acknowledgements
Many thanks to Lada Altmanová, Stanislav Šíma and Josef Vojtěch from CESNET
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 14
Experiments with 10 GE long-haul transmissions in academic and research networks
References
[1] Karásek, M. - Radil, J. - Boháč, L. , „Optimization of NRZ data transmission at 10 Gbit/s over G.652 without in-line EDFA’s “, In: Fiber and Integrated Optics, tbp, 2004. [2] Šíma, S. - Altmanová, L. - Radil, J., „Fibres and advanced optical devices for a new network strategy. “, In: TF - NGN meeting, Cambridge, 2003. [3] Karásek, M. - Peterka, P. - Radil, J. , „202 km repeaterless transmission of 2 x 10 GE plus 2 x 1 GE channels over standard single mode fibre “, In: Optics Communications, tbp, 2004. [4] Karásek, M. - Peterka, P. - Radil, J. , „Repeaterless Transmission of 2 x 10 GE Channels over 252 km of Standard Single Mode Fibre without in-line EDFA “, In: IEEE J. on Selected Areas in Communications, sfp, 2004.
April 19-21, 2004 Spring 2004 Internet2 Member
Meeting, Arlington, Virginia 15
Experiments with 10 GE long-haul transmissions in academic and research networks
Thank you for your attention!