Stable tuning of photorefractive microcavities using an auxiliary laser

Cavity nonlinear optics enables intriguing physical phenomena to occur at micro- or nano-scales with modest input powers. While this enhances capabilities in applications such as comb generation, frequency conversion, and quantum optics, undesired effects including photorefraction thermal bistability are exacerbated. In Letter, we propose demonstrate a highly effective method of achieving cavity stabilization using an auxiliary laser for controlling z-cut periodically poled lithium niobate (LN) microcavity system. Our numerical study accurately models the photorefractive effect under high powers, guiding future analyses development LN systems.