title: Efficient passively Q-switched laser operation of Yb in the disordered NaGd(WO4)2 crystal host.
abstract: Efficient passively Q-switched laser operation of the disordered Yb:NaGd(WO(4))(2) crystal is demonstrated for the first time to our knowledge with a Cr(4+):YAG saturable absorber by diode end pumping. 2.05 W of average output power at a pulse repetition frequency of 13.3 kHz was obtained at an absorbed pump power of 7.7 W, with a slope efficiency of 40%. The energy and duration of the generated laser pulse were 154 microJ and 33 ns, respectively, corresponding to a peak power of 4.67 kW. In continuous-wave operation, the Yb:NaGd(WO(4))(2) laser yielded an output power of 5.5 W with an optical-optical efficiency of 51%.
authors.affiliation: College of Physics, Qingdao University, China. junhai_liu@hotmail.com
authors.forename: Junhai
authors.initials: J
authors.lastname: Liu
authors.forename: Valentin
authors.initials: V
authors.lastname: Petrov
authors.forename: Huaijin
authors.initials: H
authors.lastname: Zhang
authors.forename: Jiyang
authors.initials: J
authors.lastname: Wang
authors.forename: Minhua
authors.initials: M
authors.lastname: Jiang