Figure 3: Mollow triplet sidebands filtered by the FADOF

(a) Mollow triplet with both sidebands tuned on resonance with the filter transmission features (dotted lines): integration time around 300 s. (b) Calculated Mollow triplet (purple) and calculated filter function of the Cs-FADOF (blue): (c) Mollow triplet spectrum transmitted through the FADOF: both sidebands are simultaneously transmitted while the central Rayleigh peak is fully suppressed. Integration time around 4000, s. The solid curve is calculated as a simple multiplication of the spectra in (b), normalized considering the current count rate. (d) Experiment performed after detuning the laser (so also the Mollow triplet) by +0.7 GHz and with 90% of the previous pump power: only one sideband is now transmitted through the filter. Solid green curve represents the calculation with the actual experimental parameters (that is power and detuning) (e) Same experiment as in (c) but with a laser detuned by −0.8 GHz and with same power as in (d). For both (d) and (e) the integration time was around 2000, s. The shot noise is displayed by the blue bars on the right side of panels (c)–(e). More information can be found in Supplementary Information.