Phase-matching properties of yellow color HgGa2S4 for SHG and SFG in the 0.944-10.5910 µm range.

ABSTRACT

We report new experimental results on the phase-matching properties of yellow color HgGa2S4 crystals for harmonic generation of an NdYAG laser-pumped KTiOPO4 (KTP) optical parametric oscillator (OPO) and CO2 lasers in the 0.944-10.5910 µm range. In addition, we present new Sellmeier equations that provide a good reproduction of the present experimental results as well as the published data points for second-harmonic generation of CO2 laser radiation at 9.2197-9.6392 µm and NdYAG laser-pumped OPOs at 1.205-1.725 µm and 2.77-9.10 µm that were achieved with the orange and yellow color crystals.