With the implementation of a fast-bandwidth servo, along with improved laser construction and associated better passive stability, we have achieved subfemtosecond relative timing jitter between two independent, actively synchronized, mode-locked Ti:sapphire lasers. Timing jitter of 0.58 fs is obtained with a 160-Hz observation bandwidth over several seconds. Within a 2-MHz observation bandwidth, the timing jitter is 1.75 fs. Excellent repeatability and rapid speed in setting an arbitrary time delay between two pulses are also demonstrated.
Shelton, Robert K.; Foreman, Seth M.; Ma, Long-Sheng; Hall, John L.; Kapteyn, Henry C.; Murnane, Margaret M.; Notcutt, Mark; and Ye, Jun, "Subfemtosecond Timing Jitter between Two Independent, Actively Synchronized, Mode-Locked Lasers" (2002). Physics Faculty Contributions. 70.