title: Efficiency-enhanced optical parametric down conversion for mid-infrared generation on a tandem periodically poled MgO-doped stoichiometric lithium tantalate chip.
abstract: We report an efficiency-enhanced mid-infrared generation via optical parametric down conversion. A tandem periodically-poled MgO-doped stoichiometric lithium tantalate crystal is used to realize on-chip generation and amplification of mid-infrared radiation inside an optical parametric oscillator cavity. We achieved 21.2% conversion efficiency (24% slope efficiency), which is among the highest efficiencies for the pump-to-mid-infrared conversion, with 1064 nm Nd class laser pump. The maximum average output power at 3.87 μm reached 635 mW with a 3.0 W pump.
authors.affiliation: National Laboratory of Solid State Microstructures, College of Physics, Nanjing University, Nanjing, China.
authors.forename: Y H
authors.initials: YH
authors.lastname: Liu
authors.forename: Z D
authors.initials: ZD
authors.lastname: Xie
authors.forename: W
authors.initials: W
authors.lastname: Ling
authors.forename: Y
authors.initials: Y
authors.lastname: Yuan
authors.forename: X J
authors.initials: XJ
authors.lastname: Lv
authors.forename: J
authors.initials: J
authors.lastname: Lu
authors.forename: X P
authors.initials: XP
authors.lastname: Hu
authors.forename: G
authors.initials: G
authors.lastname: Zhao
authors.forename: S N
authors.initials: SN
authors.lastname: Zhu