[caption id="attachment_3081" align="alignleft" width="300"] Optical spectrum of a 100 Gbps DP-MB-OFDM measured by the High Resolution Optical Spectrum Analyser[/caption]

The Apex Technologies Ultra High Resolution Optical Spectrum Analyser is a high efficient tool for generating and adjusting coherent Dual-Polarisation Multi-Band Orthogonal Frequency Division Multiplexing (DP-MB-OFDM) signals. This paper shows an experimental comparison of the DP-MB-OFDM signals and Quadrature Phase Shift Keying QPSK for 100 Gbps long-haul transport over legacy infrastructure combining G.652 fiber and 10 Gbps WDM system. This paper shows that DP-MB-OFDM and DP-QPSK have nearly the same performance at 100 Gbps after transmission over a 10×100 km fibre line.