Abstract

Non-oxide nonlinear crystals are of great significance in the advancement of optical parametric sources in the mid-infrared (mid-IR) beyond 4 μm. The newly developed semiconductor material, orientation-patterned gallium phosphide (OP-GaP), holds promise as the next-generation quasi-phase-matched (QPM) crystal, offering high nonlinearity (d₁₄=70.6 pm/V), wide transparency up to ~12 μm, and significantly lower absorption in the near-IR region [1] as compared to other mid-IR materials, enabling the deployment of well-established laser pump sources near 1 μm to generate mid- to deep-IR radiation. Here, we report what we believe to be the first optical parametric generator (OPG) based on OP-GaP pumped by a pulsed Nd:YAG laser at 1.064 μm.

© 2017 IEEE