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OPENFLOW/SDN FOR OPTICAL NETWORKS
© 2010 Taylor & Francis Group, LLC
that an OF-MOTP is attached to each OF-BV-WXC (Figure14.53),
and the Tx/Rx in the OF-MOTP is based on Nyquist-wavelength
division multiplexing (WDM) [73] and coherent detection. e use
of aggressive optical prefiltering with a spectrum shape approaching
that of a Nyquist filter, together with a square spectrum, minimizes
the required bandwidth to a value equal to the channel baud rate. For
example, the required bandwidth for a 400-Gb/s flow with the modu-
lation format DP-QPSK is 112 GHz (i.e., 448/4) [68]. erefore, the
required SW is 9 × 12.5 GHz.
Figure 14.54 shows the Wiresha ...