Fig. 5: Experimental realizations of several interferometric circuits in a waveguide mesh using particle swarm optimization algorithm.
From: Multipurpose self-configuration of programmable photonic circuits
a Labeled schematic of the electrically driven units for a targeted 2-Tunable Basic Unit (TBU) imbalanced Mach–Zehnder interferometer (MZI) and evolution of the spectral traces employing 101 points for a set of selected operations. b Labeled schematic of the electrically driven units, for a targeted 6-TBU optical ring resonator (ORR) response and evolution of the spectral traces employing 301 points for a set of selected operations. c Labeled schematic of the electrically driven units, for a targeted 10-TBU ORR and evolution of the spectral traces employing 501 points for a set of selected operations. The average MSE obtained for each of these configurations after the end of the process were of 0.542, 0.702, and 4.139, with ER of around 25 dB for the 2-TBU MZI and the 6-TBU ORR, and 20 dB for the 10-TBU ORR. The overall number of operations in each experiment was of 1612 for a and b, and 1840 for c.
