title: Timing jitter optimization of mode-locked Yb-fiber lasers toward the attosecond regime.
abstract: We demonstrate ultra-low timing jitter optical pulse trains from free-running, 80 MHz repetition rate, mode-locked Yb-fiber lasers. Timing jitter of various mode-locking conditions at close-to-zero intracavity dispersion (-0.004 to +0.002 ps(2) range at 1040 nm center wavelength) is characterized using a sub-20-attosecond-resolution balanced optical cross-correlation method. The measured lowest rms timing jitter is 175 attoseconds when integrated from 10 kHz to 40 MHz (Nyquist frequency) offset frequency range, which corresponds to the record-low timing jitter from free-running mode-locked fiber lasers so far. We also experimentally found the mode-locking conditions of fiber lasers where both ultra-low timing jitter and relative intensity noise can be achieved.
authors.affiliation: KAIST Institute for Optical Science and Technology and School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.
authors.forename: Youjian
authors.initials: Y
authors.lastname: Song
authors.forename: Chur
authors.initials: C
authors.lastname: Kim
authors.forename: Kwangyun
authors.initials: K
authors.lastname: Jung
authors.forename: Hyoji
authors.initials: H
authors.lastname: Kim
authors.forename: Jungwon
authors.initials: J
authors.lastname: Kim