title: Nanosecond optical parametric oscillator based on large-aperture periodically poled RbTiOAsO(4).
abstract: We report on optical parametric oscillators (OPO's) based on periodically poled RbTiOAsO(4) (PP RTA), which are pumped by Q -switched solid-state lasers. With a diode-pumped Nd:YVO(4) laser (pulse energy, 800microJ ; pulse duration, 5.5 ns; repetition rate, 1 kHz) the PP RTA OPO generated 1.58-microm signal and 3.26-microm idler radiation with a signal pulse energy of 45microJ . The large aperture of 3 mmx3 mm of the PP RTA crystal also permitted OPO operation with pump pulse energies as high as 65 mJ, provided by a flash-lamp-pumped Q -switched Nd:YAG laser (pulse duration, 20 ns; repetition rate, 10 Hz). With this pump source the OPO generated signal pulse energies as high as 17 mJ, corresponding to an efficiency of 26%. The performance of this OPO shows that large-aperture PP RTA crystals are well suited for pulsed nanosecond OPO operation with pump pulse energies of tens of millijoules.
authors: H
authors: H
authors: Karlsson
authors: M
authors: M
authors: Olson
authors: G
authors: G
authors: Arvidsson
authors: F
authors: F
authors: Laurell
authors: U
authors: U
authors: Bäder
authors: A
authors: A
authors: Borsutzky
authors: R
authors: R
authors: Wallenstein
authors: S
authors: S
authors: Wickström
authors: M
authors: M
authors: Gustafsson