Open AccessCost‐Effective Transition to 40 Gb/s Line Rate Using the Existing 10 Gb/s‐Based DWDM Infrastructure
Author(s) -
Lee Sang Soo,
Cho Hyunwoo,
Lim SangKyu,
Lee DongSoo,
Yoon KyeongMo,
Lee YongGi,
Kim Kwangjoon,
Ko Jesoo
Publication year - 2008
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.08.1107.0036
Subject(s) - wavelength division multiplexing , transponder (aeronautics) , upgrade , transmission (telecommunications) , electronic engineering , line (geometry) , computer science , engineering , physics , telecommunications , optics , wavelength , mathematics , geometry , operating system , aerospace engineering
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 40×40 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.