Mid-IR Intra-Cavity OPO

The mid-infrared spectral region is of significant interest due to the atmospheric absorption lines present in this region. We report the development of a compact, highly efficient, high power intra-cavity pumped all-solid-state optical parametric oscillator (OPO) producing nanosecond pulses with an output tunable from 1.5 microns to 3.4 microns with pulse energies ranging from 0.5mJ to over 4mJ over the entire range at kHz repetition rates. We have built both water-cooled and air-cooled versions of the OPO for various power level requirements.