title: Low quantum defect laser oscillation of a new mixed Yb0.009:Y0.575Gd0.416VO4 crystal.
abstract: Spectroscopic properties and continuous-wave laser performance of a new Yb(0.009):Y(0.575)Gd(0.416)VO(4) mixed vanadate crystal are reported. Purely sigma-polarized laser oscillation at 1013-1009.5 nm, with quantum defect lower than 3%, is demonstrated at room temperature in free running mode under diode pumping, producing an output power of 1.55 W with optical-to-optical and slope efficiencies of 19% and 32%, respectively. At longer wavelengths where the pi-polarized oscillation exhibited higher gain, the output power reached 2.5 W, with a slope efficiency of 41%.
authors.affiliation: College of Physics, Qingdao University, Qingdao, China. junhai_liu@hotmail.com
authors.forename: Junhai
authors.initials: J
authors.lastname: Liu
authors.forename: Huaijin
authors.initials: H
authors.lastname: Zhang
authors.forename: Xavier
authors.initials: X
authors.lastname: Mateos
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Han
authors.forename: Valentin
authors.initials: V
authors.lastname: Petrov
authors.forename: Jiyang
authors.initials: J
authors.lastname: Wang