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

We present a MgO:PPLN-based optical parametric oscillator (OPO) pumped by all-fiber Yb-doped fiber laser (YDFL). The performances of the linearly polarized YDFL are first investigated. A maximum power of 79.1 W at 1064.1 nm is obtained with the repetition rate of 300 kHz and pulse width of 200 ns. Then we examine the dependence of OPO characteristics on the pump repetition rate, pulse width, and waist diameter. By optimizing these factors, we report a maximum mid-infrared (MIR) power of 10.82 W at 3.754 mu m with the conversion efficiency of 13.68%. The corresponding total output power reaches 35.4 W.

Automated summary

The study focused on the performance of a MgO:PPLN-based optical parametric oscillator pumped by an all-fiber Yb-doped fiber laser, investigating factors such as pump repetition rate, pulse width, and waist diameter. Through optimization, a maximum mid-infrared power output of 10.82 W with a conversion efficiency of 13.68% was achieved, resulting in a total output power of 35.4 W.