Multi-optical parametric oscillator based on electro-optical polarization mode conversion at 3.3 μm and 3.84 μm.

• A MOPO based on two electro-optical polarization mode conversions is reported. • Two EO PCs can rotate the polarization states of 1.47 μm and 3.3 μm. • The MOPO can obtain 3.3 μm and 3.84 μm output simultaneously without back conversion. The multi-optical parametric oscillator (MOPO) based on electro-optical polarization mode conversion is reported in this paper, which get two idle lights at 3.3 μm and 3.84 μm simultaneously. In the optical parametric cavity, two electro-optical polarization mode converters are placed to rotate the parametric light polarization. When the electric field intensity of electro-optical polarization mode converters are 11.5 V/mm and 34.9 V/mm respectively, the maximum output power of 3.3 μm and 3.84 μm are 2.03 W and 2.25 W, the conversion efficiency to 1064 nm is 8.3% and 9.2%, and the power ratio of 3.3 μm to 3.84 μm is 0.90. The experimental results confirm that the electro-optical polarization mode converters can regulate the conversion of MOPO, resulting in the suppression of back conversion, and the adjustment of parametric light gain. [ABSTRACT FROM AUTHOR]