Fig. 3: Injection locking to higher self-pulsing harmonics.
From: Giant injection-locking bandwidth of a self-pulsing limit-cycle in an optomechanical cavity
a Colour contour plot of the power spectral density (PSD) spectra as a function of the modulation frequency covering a range between fmod = 10 MHz and 500 MHz to for a modulation amplitude of Pmod = ±3.4%. The PSD power is quantified in dBm in the colour scale. b Coherent frequency response of the reflected optical signal (S21) measured in the vector network analyzer (VNA) as a function of the modulation/detection frequency (black curve, left axis) and PSD spectra measured in the spectrum analyzer (SA) when the modulation is off (red curve, right axis).
