Figure 4: Evolution of the synchronization bandwidth of the two mutually synchronized oscillators depending on the delay constant (associated to the length of the delay line).
The DC current applied to STO 1 is +10.6 mA and the one applied to STO 2 is swept. Colour maps of the power spectral density as a function of frequency and IDC,1 at different delays: intermediate synchronization bandwidth (a) for ψΔτ=1.25π, minimum (b) for ψΔτ=1.4π, intermediate (c) for ψΔτ=1.6π and maximum (d) for ψΔτ=1.9π. The error bars correspond to the limits of the current zone for which phase slips (linewidth enhancements) appears and disappear.
