Study on energy field regulation of multiple optical parametric oscillator based on electro-optic polarization transform and difference frequency generation

Abstract

In this paper, an active regulation method of back conversion for multiple optical parametric oscillator energy field based on electro-optical polarization mode conversion and difference frequency generation is proposed. The strong gain parametric light is converted into the weak gain parametric light to ensure that the parametric light energy in the oscillating cavity is in equilibrium and the back conversion effect is suppressed. The active regulation method is analyzed by means of polarization coupled and difference frequency conversion, and it is concluded that the intensity of electric field loaded on crystal and the power density of difference frequency pump determine the parametric conversion efficiency. Compared with the passive inhibition method, the active regulation method has the characteristics of strong dynamic compensation ability with wide range of basic frequency optical pumping energy, and can greatly improve the conversion efficiency and peak power.