title: Diode-pumped continuous-wave and passively mode-locked Yb:GSO laser.
abstract: We report on both continuous-wave and passively mode-locked laser actions of a new ytterbium-doped laser crystal Yb:Gd(2)SiO(5) (Yb:GSO) under high-power diode-end-pumping. Due to the anisotropic and compact crystal structure, Yb:GSO exhibits a large manifold splitting of Yb(3+) ions, and a Yb:GSO laser can be operated efficiently with negligible reabsorption losses at emission wavelengths. In the continuous-wave operation, a Yb:GSO laser was operated with a slope efficiency of 49% near 1094 nm--the longest laser wavelength achieved for Yb(3+) lasers. Passive mode locking was obtained with a semiconductor saturable-absorber mirror. At a pump power of 6.23 W, a maximum average output power of 638 mW was obtained with the repetition rate of 145.5 MHz.
authors.forename: Wenxue
authors.initials: W
authors.lastname: Li
authors.forename: Haifeng
authors.initials: H
authors.lastname: Pan
authors.forename: Liang'en
authors.initials: L
authors.lastname: Ding
authors.forename: Heping
authors.initials: H
authors.lastname: Zeng
authors.forename: Guangjun
authors.initials: G
authors.lastname: Zhao
authors.forename: Chengfeng
authors.initials: C
authors.lastname: Yan
authors.forename: Liangbi
authors.initials: L
authors.lastname: Su
authors.forename: Jun
authors.initials: J
authors.lastname: Xu