Suppression of Time Delay Signature in Chaotic Semiconductor Lasers with Filtered Optical Feedback

Figure 3

Time series (a1)–(a3), ACF curves (b1)–(b3), and DMI curves (c1)–(c3) for the different widths of filter, where Λ=17 GHz (first row), Λ=7 GHz (second row), Λ=3 GHz (third row) keeping time delay 𝜏=5 ns, frequency detuning Δ𝜈=0, and 𝜅=15%.