ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Cost-Effective Transition to 40 Gb/s Line Rate Using the Existing 10 Gb/s-Based DWDM Infrastructure

  • Lee, Sang-Soo (Optical Communications Research Center, ETRI) ;
  • Cho, Hyun-Woo (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
  • Lim, Sang-Kyu (IT Convergence Technology Research Laboratory, ETRI) ;
  • Lee, Dong-Soo (Optical Communications Research Center, ETRI) ;
  • Yoon, Kyeong-Mo (Technology Engineering BU Network Planning Department, KT) ;
  • Lee, Yong-Gi (Network Engineering Department, Platform Laboratory, KT) ;
  • Kim, Kwang-Joon (Optical Communications Research Center, ETRI) ;
  • Ko, Je-Soo (Optical Communications Research Center, ETRI)
  • Received : 2007.09.04
  • Published : 2008.04.30
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Abstract

In this paper, we propose and demonstrate a cost-effective technique to upgrade the capacity of dense wavelength division multiplexing (DWDM) networks to a 40 Gb/s line rate using the existing 10 Gb/s-based infrastructure. To accommodate 40 Gb/s over the link optimized for 10 Gb/s, we propose applying a combination of super-FEC, carrier-suppressed return-to-zero, and pre-emphasis to the 40 Gb/s transponder. The transmission of 40 Gb/s DWDM channels over existing 10 Gb/s line-rate long-haul DWDM links, including $40{\times}40$ Gb/s transmission over KT's standard single-mode fiber optimized for 10 Gb/s achieves successful results. The proposed upgrading technique allows the Q-value margin for a 40 Gb/s line rate to be compatible with that of 10 Gb/s.

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