Non-critical singly resonant synchronously pumped OPO for generation of picosecond pulses in the mid-infrared near 6.4 micron

The recently developed chalcopyrite CdSiP2 is employed in a picosecond, 90°-phase-matched, synchronously pumped, optical parametric oscillator pumped at 1064 nm to produce steady-state idler pulses near 6.4 𝜇m with an energy as high as 2.8 𝜇J at 100 MHz, in a train of 2-𝜇s-long macropulses following at a repetition rate of 25 Hz. Without an intracavity etalon, the 12.6-ps-long micropulses have a spectral width of 240 GHz