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Experiments on optical layer and breakable research networks

Explore motivations, numerical simulations, and practical results of experiments on optical layer and breakable research networks, including CzechLight experimental network. Discussing cost-effective solutions and future deployments.

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Experiments on optical layer and breakable research networks

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  1. Experiments on optical layerand breakable research networks www.cesnet.cz Jan Radil 14th TF - NGN Meeting, Amsterdam, Netherlands

  2. Experiments on optical layer and breakable research networksOutline • Motivations for our experiments • Numerical simulations • Practical results • CzechLight – experimental network • Conclusions 14th TF - NGN Meeting, Amsterdam, Netherlands

  3. Experiments on optical layer and breakable research networksMotivations • Utilization of dark fibres • Cost effective solutions • 1 GE and 10 GE everywhere • Nothing-in-line (NIL) approach • Drawback and problems with in-line amplifiers (EDFAs, Raman) 14th TF - NGN Meeting, Amsterdam, Netherlands

  4. Experiments on optical layer and breakable research networksNumerical simulations • To estimate the maximum span length @10Gbit/s with G.652/G.655fibres • Optimization of input powers (EDFA, Raman) and dispersion compensation ratio • Theoretical analysis of the Raman effects 14th TF - NGN Meeting, Amsterdam, Netherlands

  5. Experiments on optical layer and breakable research networksPractical results • 2 x 1 GE plus 2 x 10 GE over 202 km [1] • 2 x 10 GE over 252 km [2] • Non DWDM equipment, easy to set up (with optical tunable filters) • All-optical gain-clamped (AOGC) RFA [3], [4] • A new method for gain stabilization 14th TF - NGN Meeting, Amsterdam, Netherlands

  6. Experiments on optical layer and breakable research networksPractical results – the map of Czech republic • Air distances • Corrections needed • Air to fibre distance ratio – AFDR • AFDR = 0,65 (worst case for Praha-Brno fibre: 190 km/290 km) • From reference [5] 14th TF - NGN Meeting, Amsterdam, Netherlands

  7. Experiments on optical layer and breakable research networksPractical results – the map of Czech republic • Corrected diameters • CzechLight experimental network • From reference [5] 14th TF - NGN Meeting, Amsterdam, Netherlands

  8. Experiments on optical layer and breakable research networksCzechLight • Today – one Cisco ONS 15454 in Praha (February 2003) • 2,5 Gb/s circuit to Amsterdam (NetherLight) • CESNET is now a TransLight Affiliate Member • Upgrade to 10 G with another 15454 in Brno • For supercluster/grid users, other researchers • Experimental AND breakable network (independent on production IP network - CESNET2) 14th TF - NGN Meeting, Amsterdam, Netherlands

  9. Experiments on optical layer and breakable research networksCzechLight • How to transform research results into practical life? • Future deployment of WDM/DWDM NIL 1 GE and 10 GE transmissions • Deployment of AOGC RFA • Utilization of results of the Liberouter project – www.liberouter.org (1 GE and 10 GE interface cards, repeaters, transponders,…) • Experiments with OOO switching and GMPLS? 14th TF - NGN Meeting, Amsterdam, Netherlands

  10. Experiments on optical layer and breakable research networksConclusions • Cost effective deployment of multi-channel 1 GE and 10 GE pipes (NIL, if possible) • All-optical gain stabilization in multiwavelengths networks • Breakable experimental networks (CzechLight) • Lightpaths (one stream of photons) and bandwidth on demand 14th TF - NGN Meeting, Amsterdam, Netherlands

  11. Experiments on optical layer and breakable research networksAcknowledgements • Many thanks to Lada Altmanová, Stanislav Šíma,Miroslav Karásek, Martin Míchal and Josef Vojtěch from CESNET 14th TF - NGN Meeting, Amsterdam, Netherlands

  12. Experiments on optical layer and breakable research networksReferences • [1] 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. • [2] 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. • [3] Karásek, M. - Kaňka, J. - Honzátko, P. - Radil, J. , „Protection of Surviving Channels in All-Optical Gain-Clamped Lumped Raman Fibre Amplifier: Modelling and Experimentation.“, In: Optics Communications 231, 2004. • [3] Karásek, M. - Kaňka, J. - Honzátko, P. - Radil, J. , „Channel Addition/Removal Response in All-Optical Gain-Clamped Lumped Raman Fiber Amplifier .“, In: IEEE Photonics Technology Letters, vol. 16, no. 3, 2004. • [5] Radil, J. - Karásek, M., „Experiments with 10 GE long-haul transmissions in academic and research networks.“, In: I2 member meeting, Arlington, VA, 2004. 14th TF - NGN Meeting, Amsterdam, Netherlands

  13. Experiments on optical layer and breakable research networksThank you for your attention! 14th TF - NGN Meeting, Amsterdam, Netherlands

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