Figure 3
From: Synchronous multi-color laser network with daily sub-femtosecond timing drift
Experimental results of the synchronous mode-locked laser network. (a) Long-term performance; top graph shows the relative timing drift data sampled at 2 Hz and underneath is the relative timing instability vs. averaging time. Please note, that the measurement noise below 1 Hz is only ~0.8 as RMS (see Methods section). (b) Short-term performance above 1 Hz; relative timing jitter spectral density and integrated timing jitter of (i) the laser network; (ii) the local synchronization between the slave lasers and (iii) the noise floor of SF-BOC2. Please note that detector noise floor is only 12 as RMS integrated for 1 Hz–1 MHz. (c) Timing jitter and phase noise for the complete measurement range from 7 μHz up to 1 MHz. Right axes of (b) and (c) indicate the equivalent single-sideband (SSB) phase noise rescaled to 10-GHz carrier frequency.
