Numerical investigations of parametric transfer in synchronously pumped optical parametric oscillators for indirect mid-infrared pulse shaping

We present numerical investigations of parametric transfer in synchronously pumped optical parametric oscillators (SPOPOs) used for indirect mid-infrared pulse shaping. The introduction of an optical bandpass filter in the resonator results in transfer of intensity and phase profile of the input pump onto the output idler pulse. We investigate the effect of resonator parameters, process nonlinearity, and chromatic dispersion of the nonlinear crystal, on the SPOPO behavior and the transfer fidelity. We show numerically that parametric transfer from a broad-bandwidth pump pulse can be achieved with good fidelity and high efficiency for a broad range of parameters in a periodically poled lithium niobate SPOPO.