Figure 6
(a) Simulated transmission spectra at through (blue) and drop (red) ports of a system with an all-pass MRM cascaded with an add-drop MRR filter (Type-I), the linewidth-normalized channel spacing is set to 0.5. Inset: Schematic of the Type-I system, where the left-hand MRR filter generates the resonant peak at Channel-1 and the right-hand one generates the resonant peak at Channel-2. (b) Attainable values for Channel-1 and Channel-2 of Type-I system with \(\delta \omega \) = 0.5. The red box shows the usable range of [0, 0.5] for both channels. (c) Simulated transmission spectra at through (blue) and drop (red) ports of a system with two cascaded all-pass MRMs (Type-II), the linewidth-normalized channel spacing is set to 0.5. Inset: Schematic of the Type II system, where the left-hand MRR filter generates the resonant peak at Channel-1 and the right-hand one generates the resonant peak at Channel-2. (d) Attainable values for Channel-1 and Channel-2 of Type-II system with \(\delta \omega \) = 0.2. The red box shows the usable range of [–0.5, 0.5] for both channels. (e) Attainable mapping range for two types of IM-MRM cascaded systems with the linewidth-normalized channel spacing varying from 0.1 to 1. The dashed line represents the 3-dB power penalty threshold.
