40 Gbit/s transmission and cascaded all-optical wavelength conversion over 1 000 000 km Leuthold, J. ; Raybon, G. ; Su, Y. ; Essiambre, R. ; Cabot, S. ; Jaques, J. ; Kauer, M. Abstract Publication: Electronics Letters Pub Date: 2002 DOI: 10.1049/el:20020595 Bibcode: 2002ElL....38..890L