Cascadability Investigation of High Granular Optical Channel Defragmentation Node for Flexible Optical Networks

Two different node configurations are testes: no-guard-interval (No-GI) and inter-band guard-interval (IB-GI) configuration. The bit-error-rate of No-GI exceeds 10(exp -3) after 8-hop, whereas 16- hop was achieved in IB-GI configuration with BER~10(exp -3), owing to the elimination of tight filtering.