2002 - cesnet

4 Optical Networks and theirDevelopmentWithin the project Optical Networks and their Development, we focused on thedevelopment of optical research and education networks in the world, and participatedin international projects concerning the construction and applicationof these networks. After we presented our achievements during the TERENAconference in July 2002, some foreign partner networks expressed their interestin the application of the results achieved during the designing and deploymentof long optical lines without intermediate devices, and in further collaborationconcerning the development of this method for the construction of optical networks,also referred to as the “Nothing-In-Line (NIL) approach”.In addition, we have become one of the few countries with access to the internationallambda services for research purposes and the possibility of participatingin its development. We designed the topology for further development ofthe CESNET2 optical network and ensured the necessary data circuits, particularlyoptical ones.As regards the development of long optical circuits without an in-line amplificationor regeneration for the National Research and Education Networks(NRENs) our researchers seem to have reached the world-leading position. Wehope to achieve a similar result in the field of single-fibre long-distance circuitsusage. Among the best results achieved, there was the acquisition of the firstoptical mile leading to a number of other nodes, including the network centre,as this problem is still considered throughout the world to be one of the mostdemanding ones.The preparation for the application of WDM systems is also worth mentioning.Their deployment (after a validation of their reliability of course) will enable usto split the leased fibre traffic into more colours. One colour may be used for theCESNET2 common traffic, other colours for the access to CzechLight or otherexperiments and yet other colours e.g, for the projects concerning a collaborationwith the producers of optical devices. In addition, there were experimentscommenced for the provision of access to CzechLight using PC routers, developedas part of our research.In conclusion, we may say that the researchers of the project titled Optical Networksand their Development managed to make use of advantageous price conditionsfor the lease of fibres and the purchase of telecommunication services,and that the success exceeded previous expectations, particularly as regards:• Establishment of CzechLight,• Incorporation in TF-NGN and the international SERENATE project,High-speed National Research Network and its New Applications 200239