The data used to generate figures 3 - 7. Including: zip file of spectral csv files used to generate the heat map in figure 3; Excel file containing normalised spectra examples from three experimental cavities for figure 4; Excel file containing auto correlation traces from three experimental cavities including a longer time scale trace for the figure inset for figure 5; Excel file containing the measured mode locking and multi-pulsing thresholds of six experimental cavities with theoretical plot for figure 6; and an Excel file containing the multi-pulsing thresholds expressed in nonlinear phase shift normalised to pi shown in figure 7.