title: Longwave-IR optical parametric oscillator in orientation-patterned GaAs pumped by a 2 µm Tm,Ho:YLF laser.
abstract: We demonstrate longwave infrared (LWIR) generation with an optical parametric oscillator (OPO) based on quasi-phasematched orientation-patterned gallium arsenide (OPGaAs). The OPGaAs OPO was directly pumped with a Q-switched λ = 2.054 μm Tm,Ho:YLF laser. OPGaAs samples representing three different grating periods were used to explore the LWIR OPO performance yielding outputs ranging from λ = 2.5-2.7 μm (signal) and λ = 8.8-11.5 μm (idler). Slope efficiencies for the combined signal and idler outputs reach as high as 26% while slope efficiencies for only the idler reached 8%. Spectral measurements of OPO output confirm good agreement with theoretical calculations.
authors.affiliation: Air Force Research Laboratory, 2241 Avionics Cir., Wright-Patterson AFB, OH 45433, USA. Ryan.Feaver@wpafb.af.mil
authors.forename: R K
authors.initials: RK
authors.lastname: Feaver
authors.forename: R D
authors.initials: RD
authors.lastname: Peterson
authors.forename: P E
authors.initials: PE
authors.lastname: Powers