multiplexers (ROADMs) induce penalties on the optical signal due to tight optical filtering,
which increases as several ROADMs are cascaded in a meshed network. In this letter, we
propose and analyze possible configurations for the mitigation of these penalties in optical
domain using optical wave shaper (WS). Including one WS in every ROADM node allows
transmission of 28 and 32 GBd signals, which are QPSK, 8-QAM, or 16-QAM modulated …