Efficient Femtosecond Mid-IR Optical Parametric Generation at 10 MHz Pumped by a Mamyshev Fiber Oscillator and Amplifier

Abstract

We report highly efficient (~60%) femtosecond mid-IR optical parametric generation at 10-MHz repetition rate exploiting zero-group-velocity-mismatch condition in 19-mm-long PPLN and 42-mm-long MgO:PPLN crystals. We obtain 300-fs signal pulses with 3.4-4.1 μm idlertuning.