title: Subfemtosecond timing jitter between two independent, actively synchronized, mode-locked lasers.
abstract: 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.
authors.forename: Robert K
authors.initials: RK
authors.lastname: Shelton
authors.forename: Seth M
authors.initials: SM
authors.lastname: Foreman
authors.forename: Long-Sheng
authors.initials: LS
authors.lastname: Ma
authors.forename: John L
authors.initials: JL
authors.lastname: Hall
authors.forename: Henry C
authors.initials: HC
authors.lastname: Kapteyn
authors.forename: Margaret M
authors.initials: MM
authors.lastname: Murnane
authors.forename: Mark
authors.initials: M
authors.lastname: Notcutt
authors.forename: Jun
authors.initials: J
authors.lastname: Ye