Fig. 6: Chaotic output and statistics analysis for the CSHM laser.
From: Chaotic microlasers caused by internal mode interaction for random number generation
a Output RF spectra at 22, 23, and 24 mA and noise spectrum of the test system. b Temporal output waveform and c corresponding autocorrelation function at 25.6 mA, inset: zoom-in view of ACF. d The correlation integral curve of CD(ε) versus the radius of the ball ε in logarithmic scale, and e corresponding slope of the integral curve in (d). f Derived K2-entropy from the integral curve. All the curves tend to converge to a common value about K2 ≈ 2.9 ns−1 as D→∞
