1 / 13

Experiments on optical layer and breakable research networks

Experiments on optical layer and breakable research networks. www.cesnet.cz. Jan Radil. Experiments on optical layer and breakable research networks Outline. Motivation s for our experiments Numerical simulations Practical results CzechLight – experimental network Conclusions.

shanae
Download Presentation

Experiments on optical layer and breakable research networks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related