Mid-infrared picosecond difference frequency generation in orientation-patterned gallium phosphide

We report the first picosecond mid-infrared source based on OP-GaP using single-pass DFG, providing tunable radiation across 3040-3132 nm, with 57 mW of average-power at 3044 nm, 3.2% rms stability over 1h, in good beam-quality.