title: Remote two-color optical-to-optical synchronization between two passively mode-locked lasers.
abstract: Using balanced detection in both the radio frequency (RF) and the optical domain, we remotely synchronize the repetition rate of a Ti:sapphire oscillator to an Er-doped fiber oscillator through a 360 m length-stabilized dispersion compensated fiber link. The drift between these two optical oscillators is 3.3 fs root mean square (rms) over 24 hours. The 68 MHz Er-doped fiber oscillator is locked to a 476 MHz local RF reference clock, and serves as a master clock to distribute 10 fs-level timing signals through stabilized fiber links. This steady remote two-color optical-to-optical synchronization is an important step toward an integrated femtosecond fiber timing distribution system for free-electron lasers (FELs); it does not require x-ray pulses, and it makes sub-10-fs optical/x-ray pump-probe experiments feasible.
authors.forename: H
authors.initials: H
authors.lastname: Li
authors.forename: L-J
authors.initials: LJ
authors.lastname: Chen
authors.forename: H P H
authors.initials: HP
authors.lastname: Cheng
authors.forename: J E
authors.initials: JE
authors.lastname: May
authors.forename: S
authors.initials: S
authors.lastname: Smith
authors.forename: K
authors.initials: K
authors.lastname: Muehlig
authors.forename: A
authors.initials: A
authors.lastname: Uttamadoss
authors.forename: J C
authors.initials: JC
authors.lastname: Frisch
authors.forename: A R
authors.initials: AR
authors.lastname: Fry
authors.forename: F X
authors.initials: FX
authors.lastname: Kärtner
authors.forename: P H
authors.initials: PH
authors.lastname: Bucksbaum