title: Broadband high-power mid-IR femtosecond pulse generation from an ytterbium-doped fiber laser pumped optical parametric amplifier.
abstract: We report on a high-power periodically poled MgO-doped lithium niobate (MgO:PPLN)-based femtosecond optical parametric amplifier (OPA), featuring a spectral seamless broadband mid-infrared (MIR) output. By modifying the initial chirp and spectrum of the mode-locked seed laser, the Yb fiber pump laser exhibits a final output power of 14 W with sub-200-fs pulse duration after power amplification and compression. When the OPA was seeded with a broadband amplified spontaneous emission (ASE) source, a damage-limited 0.6 W broadband MIR radiation was experimentally obtained under the pump power of 10.15 W at 82 MHz repetition rate, corresponding to an overall OPA conversion efficiency of 32.7%. The 3 dB bandwidth of the mid-IR idler was 291.9 nm, centering at 3.34 μm.
authors.forename: Chengzhi
authors.initials: C
authors.lastname: Hu
authors.forename: Tao
authors.initials: T
authors.lastname: Chen
authors.forename: PeiPei
authors.initials: P
authors.lastname: Jiang
authors.forename: Bo
authors.initials: B
authors.lastname: Wu
authors.forename: Jianjia
authors.initials: J
authors.lastname: Su
authors.forename: Yonghang
authors.initials: Y
authors.lastname: Shen