Fig. 2: Experimental and numerical results.
From: Brillouin-induced Kerr frequency comb in normal dispersion fiber Fabry Perot resonators
Experimental (light blue lines) and numerical results (circles in (a) and violet and green curves in (b) and (d) corresponding to the envelope of the spectrum) for different cavity detunings (δ = 0.057, 0.059 and 0.083). The insets showcase the RF beatnote at the repetition rate (10.58 GHz) with FWHM of 1 kHz, 4 Hz and 150 Hz respectively (resolution bandwidth 10 Hz). c Nonlinear transfer function of the cavity in theory (blue curve) and experiments (yellow curve) and evolution of the comb line power (green curve). Cavity detunings used in (a), (b) and (d) are denoted by circles in red, violet and green accordingly. e and f are zooms on the spectrum shown in (d) around −4.5 THz frequency shift from the pump of (d). Vertical red arrows in (d) indicate the prediction of SW spectral shoulder42. The pump power at the cavity input is 0.8 W and other parameters are listed in Methods.
