title: Generation of 30  fs pulses from a diode-pumped graphene mode-locked Yb:CaYAlO4 laser.
abstract: Stable 30 fs pulses centered at 1068 nm (less than 10 optical cycles) are demonstrated in a diode pumped Yb:CaYAlO4 laser by using high-quality chemical vapor deposited monolayer graphene as the saturable absorber. The mode-locked 8.43 optical-cycle pulses have a spectral bandwidth of ∼50  nm and a pulse repetition frequency of ∼113.5  MHz. To the best of our knowledge, this is the shortest pulse ever reported for graphene mode-locked lasers and mode-locked Yb-doped bulk lasers. Our experimental results demonstrate that graphene mode locking is a very promising practical technique for directly generating few-cycle optical pulses from a laser oscillator.
authors.forename: Jie
authors.initials: J
authors.lastname: Ma
authors.forename: Haitao
authors.initials: H
authors.lastname: Huang
authors.forename: Kaijie
authors.initials: K
authors.lastname: Ning
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Xu
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Xie
authors.forename: Liejia
authors.initials: L
authors.lastname: Qian
authors.forename: Kian Ping
authors.initials: KP
authors.lastname: Loh
authors.forename: Dingyuan
authors.initials: D
authors.lastname: Tang