Abstract
Parasitic oscillation of optical parametric generator (OPG) seriously affects transform efficiency, stability and beam quality of mid-infrared laser. And because of the cross-section of the light spot and nonlinear effect, it is difficult to eliminate parasitic oscillation. This paper focuses on the analysis of the causes of parasitic oscillation and its influence on the output power. Optical parametric oscillator (OPO) and optical parametric amplifier (OPA) in the parasitic oscillation are inconsistent. Through the study on parasitic oscillation in the optical parametric process, it can effectively improve conversion efficiency, and improve device performance.
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