Optical parametric oscillation in quasi-phase-matched GaAs

We demonstrate a GaAs based OPO. The singly resonant, pulsed OPO utilized an all-epitaxially-grown orientation-patterned GaAs (OP-GaAs) crystal. By tuning either near-IR pump wavelength or OP-GaAs temperature, we achieved broad tunability between 2 and 10 microns.