title: Midinfrared optical parametric oscillator based on the wide-bandgap BaGa4S7 nonlinear crystal.
abstract: The orthorhombic biaxial crystal BaGa(4)S(7) has been employed in a 1064 nm pumped optical parametric oscillator generating <6 ns long idler pulses with energies as high as 0.5 mJ at 6.217 μm and average power of ~50 mW at 100 Hz. Notwithstanding the relatively low nonlinearity, ~3 times above threshold operation has been achieved at pump intensities more than 5 times below the crystal surface damage limit.
authors.affiliation: Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy, 2A Max-Born-Strasse, D-12489 Berlin, Germany.
authors.forename: Aleksey
authors.initials: A
authors.lastname: Tyazhev
authors.forename: Dmitri
authors.initials: D
authors.lastname: Kolker
authors.forename: Georgi
authors.initials: G
authors.lastname: Marchev
authors.forename: Valeriy
authors.initials: V
authors.lastname: Badikov
authors.forename: Dmitrii
authors.initials: D
authors.lastname: Badikov
authors.forename: Galina
authors.initials: G
authors.lastname: Shevyrdyaeva
authors.forename: Vladimir
authors.initials: V
authors.lastname: Panyutin
authors.forename: Valentin
authors.initials: V
authors.lastname: Petrov