Extended Data Fig. 3: Instability added by phase-stabilized fibre network.
From: Improved interspecies optical clock comparisons through differential spectroscopy
The Al+ clock OLO, which is locked to the Yb clock OLO through the Er/Yb:glass frequency comb, and the Yb clock OLO are compared with a Ti:Sapphire frequency comb. The top figure shows the histogram of the frequency noise, and the bottom shows the Allan deviation plot.
