Figure 2
(a) Timing drift monitor over a 7 h time period. The Time Tool signal (red trace) stayed centered around time 0 and the blue trace shows the drift-correction value applied to the laser phase shifter in order to maintain time 0. (b) The Time Tool value is shown in red and the drift correction factor is shown in blue. The vertical dotted lines represent artificial time jumps of ±300 fs and ±400 fs to observe the response of the drift monitor feedback loop. |