title: High power, diffraction limited picosecond oscillator based on Nd:GdVO4bulk crystal with σ polarized in-band pumping.
abstract: We report on a high power passively mode-locked picosecond oscillator based on Nd:GdVO4crystal with σ polarized in-band pumping. Thermal gradient and thermal aberration was greatly decreased with proposed configuration. Maximum output power of 37 W at 81 MHz repetition rate with 19.3 ps pulse duration was achieved directly from Nd:GdVO4oscillator, corresponding to 51% optical efficiency. The oscillator maintained diffraction limited beam quality of M2< 1.05 at different output coupling with pulse duration between 11.2 ps to 19.3 ps.
authors.forename: Hua
authors.initials: H
authors.lastname: Lin
authors.forename: Jie
authors.initials: J
authors.lastname: Guo
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
authors.forename: Hai
authors.initials: H
authors.lastname: Yu
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Liang