Fig. 3: Calibration curves for four non-consecutive harmonics.
a, b Variation of the correlation coefficients ρ6,7,9 (ρ7,9,10) calculated on the correlation plots \({P}_{6,7}^{2}\) vs \({S}_{6,7}^{(0)}\) (\({P}_{9,10}^{2}\) vs \({S}_{6,7}^{(0)}\)) as a function of the delay τs4 (τs1) introduced by the phase shifter PS4 (PS1). The upper axis indicates the calibrated phase axis for the phase difference ηL (ηH). The error bars are calculated as the standard deviation of the mean values for five sets of data (each with typically 1500 shots) sampled from the total shots of data for each phase-shifter value.
