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.
© 2002 Optical Society of America
Robert K. Shelton, Seth M. Foreman, Long-Sheng Ma, John L. Hall, Henry C. Kapteyn, Margaret M. Murnane, Mark Notcutt, and Jun Ye, "Subfemtosecond timing jitter between two independent, actively synchronized, mode-locked lasers," Opt. Lett. 27, 312-314 (2002)