title: High-power Yb-fiber comb with feed-forward control of nonlinear-polarization-rotation mode-locking and large-mode-area fiber amplification.
abstract: We report on a simple scheme to precisely control carrier-envelope phase of a nonlinear-polarization-rotation mode-locked self-started Yb-fiber laser system with an average output power of ∼7  W and a pulse width of 130 fs. The offset frequency was locked to the repetition rate of ∼64.5  MHz with a relative linewidth of ∼1.4  MHz by using a self-referenced feed-forward scheme based on an acousto-optic frequency shifter. The phase noise and timing jitter were calculated to be 370 mrad and 120 as, respectively.
authors.affiliation: State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Yan
authors.forename: Wenxue
authors.initials: W
authors.lastname: Li
authors.forename: Kangwen
authors.initials: K
authors.lastname: Yang
authors.forename: Hui
authors.initials: H
authors.lastname: Zhou
authors.forename: Xuling
authors.initials: X
authors.lastname: Shen
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhou
authors.forename: Qitian
authors.initials: Q
authors.lastname: Ru
authors.forename: Dongbi
authors.initials: D
authors.lastname: Bai
authors.forename: Heping
authors.initials: H
authors.lastname: Zeng