Fig. 5: Calibration of the multilayer optoelectronic neural network.
From: Low-power scalable multilayer optoelectronic neural networks enabled with incoherent light
a Temporal response through three optical and optoelectronic layers. An 800 kHz square wave (top) is sequentially propagated through two intermediate layers (middle) and read out (bottom) on a PD. The blue arrows track the temporal delay of the signal through each layer. b Measured LED response (black) from a PD in response to a 10 MHz driving signal (blue). c Distribution of maximum optical weights and extinction ratio of an amplitude mask implemented with a liquid-crystal display (LCD). d Scatterplot of PD1 and PD2 from pairs of PDs implemented a nonnegative ReLU with a color-coded bias offset for individual pairs. e Average cross-talk distribution from weights implemented on the LCD.
