Flexible and simple link design for long-haul transmission taking real span length variations into account

Dirk Breuer, Norbert Hanik

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


The pressure on prices per bit and distance in operator networks requires an ongoing reduction of costs. In todays optical transport networks typical transparent transmission lengths are in the order of about 400 to 600 km. Then costly electrical 3R-regeneration is required. One way to deal with this cost-driver is to introduce ultra long haul (ULH) transparent WDM systems which are able to cover transmission length of e.g. up to 2000 km and thus decreasing the number of regenerative transponders. However, to maintain the flexibility of the network to add and drop traffic at required locations the use of optical add drop multiplexers (OADMs) or optical cross connects (OXCs) is mandatory in these systems, particularly for pan-European but even for European national networks. The design of such ULH-networks has to deal with a vast number of issues, in particular the physical layer design has to be very flexible and to allow for different optimization and adjustment schemes. In this paper based on computer simulations we will compare different approaches to reduce the design complexity of 10 Gbit/s ULH systems taking into account environmental constraints like availability of housing stations for different target distances.

Original languageEnglish
Pages (from-to)429-439
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2003
Externally publishedYes
EventAPOC 2003: Asia-Pacific Optical and Wireless Communications: Optical Transmission, Switching, and Subsystems - Wuhan, China
Duration: 4 Nov 20036 Nov 2003


  • Dispersion compensation
  • Dispersion map
  • Fiber nonlinearity
  • Normalized sections
  • Transparent domains


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