High-power mid-infrared pulse MgO:PPLN optical parametric oscillator pumped by linearly polarized Yb-doped all-fiber laser

•An all-fiber-laser pumped high-power mid-infrared (MIR) MgO:PPLN optical parametric oscillator (OPO) is built.•Pump repetition rate, pulse width, and waist diameter are optimized to improve the MIR output power.•A maximum mid-infrared (MIR) power of 10.82 W at 3.754 µm is obtained with the conversion efficiency of 13.68%•The corresponding maximum total output power is 35.4 W with a conversion efficiency of 44.75%.