Extended Data Fig. 3: Schematic representation of the multiplexing scheme.

a, A photodiode registers three consecutive optical pulses labeled as α, β, and γ. Each pulse produces an electrical signal with the shape of a decaying exponential function (blue). The integral of this signal is proportional to the energy carried by the respective optical pulse. The orange outlines represent the windows of the integration time. b, The boxcar integrator generates an output d.c. signal after each integration window. This d.c. value can be further read out with an oscilloscope or any analog-to-digital converter device.