40 Gbit/s-Based Long-Span WDM Transmission Technologies

Yanjun ZHU  Wong-Sang LEE  Anagnostis HADJIFOTIOU  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.2   pp.386-393
Publication Date: 2002/02/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Issue on 40 Gbit/s Optical Transmission Technologies)
40 Gbit/s,  WDM,  all-Raman,  distributed Raman amplification,  bi-directional pumping,  

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In this paper, we address the key enabling technologies for long-span WDM transmissions at 40 Gbit/s. Experimental results of 1.28 Tbit/s (32 40 Gbit/s) unrepeatered transmission over 240 km of conventional 80-µm2 NDSF will be reported. Bi-directional pumped distributed Raman amplification has allowed a record unrepeatered WDM transmission distance over this fibre type, without using effective-area-enlarged fibres or remotely pumped EDFAs.