Figure 2.

Data processing steps for a single pixel of data using Single- and multiphoton PEak Event Detection (SPEED). (a) Raw data: HPD output that was amplified and then directly digitized at 5 GS/s. (b) Photon counts based on the multiple threshold model for the HPD. (c) Photon counts averaged into twice the laser period, 25 ns. (d) Photon counts interleaved and circularly shifted to have the maximum value at t = 0 ns. (e) Photon counts (black), and sine (red) and cosine (blue) multiplication factors that are used to calculate g and s components for phasor analysis.