title: Millijoule-level picosecond mid-infrared optical parametric amplifier based on MgO-doped periodically poled lithium niobate.
abstract: A millijoule-level high pulse energy picosecond (ps) mid-infrared (MIR) optical parametric amplifier (OPA) at 3.9 μm based on large-aperture MgO-doped periodically poled lithium niobate (MgO:PPLN) crystal was demonstrated for the first time, to the best of our knowledge. The MIR OPA was pumped by a 30 ps 1064 nm Nd:YAG laser at 10 Hz and injected by an energy-adjustable near-infrared seed based on a barium boron oxide (BBO) optical parametric generator/optical parametric amplifier (OPG/OPA) with double-pass geometry. Output energy of 1.14 mJ at 3.9 μm has been obtained at pump energy of 15.2 mJ. Furthermore, the performance of MIR OPG in MgO:PPLN was also investigated for comparing with the seeded OPA.
authors.forename: Hongyan
authors.initials: H
authors.lastname: Xu
authors.forename: Feng
authors.initials: F
authors.lastname: Yang
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen
authors.forename: Ke
authors.initials: K
authors.lastname: Liu
authors.forename: Shifeng
authors.initials: S
authors.lastname: Du
authors.forename: Nan
authors.initials: N
authors.lastname: Zong
authors.forename: Jing
authors.initials: J
authors.lastname: Yang
authors.forename: Yong
authors.initials: Y
authors.lastname: Bo
authors.forename: Qinjun
authors.initials: Q
authors.lastname: Peng
authors.forename: Jingyuan
authors.initials: J
authors.lastname: Zhang
authors.forename: Dafu
authors.initials: D
authors.lastname: Cui
authors.forename: Zuyan
authors.initials: Z
authors.lastname: Xu