We report the optimization of tunable nanosecond cascaded optical parametric oscillators (COPOs) based on monolithic tandem lithium niobate superlattices. The nonlinear crystal is designed with a uniform grating section for the optical parametric oscillation process and a linearly chirped grating section for the different frequency generation process. By employing couplers with proper... https://midwaysportes.shop/product-category/apparel/