Bilayer platinum diselenide saturable absorber for 2.0 mu m passively Q-switched bulk lasers

A noble transition metal dichalcogenide, bilayers platinum diselenide (PtSe2). has a narrow bandgap (0.21 eV) and high charge carrier mobility. This metal was manufactured for use as a saturable absorber via the chemical vapor deposition method. The saturable absorption properties of samples, at a wavelength of 2.0 mu m, were characterized by the open aperture Z-scan method. An all-solid-state 2.0 mu m passively Q-switched laser was achieved experimentally based on the as-prepared bilayers PtSe2 saturable absorber. The maximum average output power. shortest pulse width, highest single-pulse energy, and highest pulse peak power of this laser were 1.41 W, 244 ns, 24.3 mu J, and 99.6 W. respectively. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement