title: Dual-wavelength Q-switched Er:SrF2laser with a black phosphorus absorber in the mid-infrared region.
abstract: An efficient Er:SrF2crystal, lightly Er-doped to a concentration of 4at.%, was successfully grown by the traditional Bridgman method and displayed excellent spectral properties. A diode-end-pumped passively Q-switched dual-wavelength laser, operating at 2.79 μm wavelength, was demonstrated with this crystal by using black phosphorus as the saturable absorber (BP-SA). In the compact passively Q-switched Er:SrF2laser, the maximum average output power of 180 mW was achieved at an absorbed pump power of 2.47 W, with a pulse duration of 702 ns and a repetition rate of 77.03 kHz. To the best of our knowledge, this is the first reported application of BP-SA to dual-wavelength pulse laser operation in the mid-infrared region.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Liu
authors.forename: Jie
authors.initials: J
authors.lastname: Liu
authors.forename: Zhinan
authors.initials: Z
authors.lastname: Guo
authors.forename: Han
authors.initials: H
authors.lastname: Zhang
authors.forename: Weiwei
authors.initials: W
authors.lastname: Ma
authors.forename: Jingya
authors.initials: J
authors.lastname: Wang
authors.forename: Liangbi
authors.initials: L
authors.lastname: Su