Fig. 3From: Low-noise transfer of the spectral purity of an optical comb line using a feedforward schemeFrequency noise power spectral density (FN-PSD) measured for the auxiliary CW laser (red), the comb mode of interest (green) and the transferred comb mode (blue, named "feedforward output") for both mode-locked lasers (a, ~ 1 GHz and b, 250 MHz), and distinct assessment of the additive noise of the setup (grey)Back to article page