Nd : YAG pumped tunable singly resonant optical parametric oscillator in mid-infrared

Abstract

A line tunable singly resonant optical parametric oscillator in the 3–5 µm spectral range based on a KTA crystal pumped by 1.064 µm radiation from a Q-switched multi-axial Nd : YAG laser has been demonstrated. Thresholds of oscillation energy at different cavity lengths and at different idler wavelengths using gratings with different rulings have been measured. Energy of the generated radiation at 3.6 µm and conversion efficiency at different pump beam energies have also been measured.