title: 1 W average-power 100 MHz repetition-rate 259 nm femtosecond deep ultraviolet pulse generation from ytterbium fiber amplifier.
abstract: We demonstrate 1W average-power ultraviolet (UV) femtosecond (fs) ultrashort pulse generation at a wavelength of 259 nm and a repetition rate as high as 100 MHz by quadrupling a fs ytterbium-fiber laser. A cavity-enhanced design is employed for efficient frequency doubling to the UV region. The optical-to-optical efficiency of UV output to the pump diode is 2.6%.
authors.affiliation: National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan. xiangyu-shuu@aist.go.jp
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Zhou
authors.forename: Dai
authors.initials: D
authors.lastname: Yoshitomi
authors.forename: Yohei
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Kenji
authors.initials: K
authors.lastname: Torizuka
mesh_terms: D053844:Lasers, Solid-State; D013997:Time Factors; D014466:Ultraviolet Rays; D015018:Ytterbium
chemical_list: D015018:Ytterbium