Resumen
This paper presents an external-cavity dual-wavelength mid-infrared multiple optical parametric oscillator based on a single MgO:APLN crystal, which is pumped by a pulsed 1.064 µm laser. The output power and beam qualities of parametric lasers at different repetition rates and transmittance were studied. When the pump power of the 1.064 µm laser was 34.5 W, the repetition rate was 63 kHz, the maximum output powers of 2.79 W@3.30 µm and 4.92 W@3.84 µm were obtained with the transmittance T = 60%@1.57 µm, corresponding to optical?optical conversion efficiencies of 8.1% and 14.3%, respectively. Meanwhile, the beam qualities of two mid-infrared laser beams were effectively optimized and the pulse widths of 9.72 ns@3.30 µm and 9.67 ns@3.84 µm were obtained synchronously.