640 Gb/s transmission of sixty-four 10 Gb/s WDM channels over 7200 km with 0.33 (bits/s)/Hz spectral efficiency

Abstract

Sixty-four 10 gb/s WDM channels were transmitted over 7200 km is a spectral bandwidth of 15.1 nm for a spectral efficiency of 0.33 (bits/s)Hz. Error free operation was achieved for all channels.