A study on diffraction efficiency of an adaptive optical limiter based on nonlinear medium sandwiched structure

An adaptive optical limiter composed of nonlinear medium sandwiched between phase grating and one piece of slab is discussed under the circumstances of weak lights and intense laser pulses. The effects of refractive indices mismatch between phase grating and nonlinear medium on diffraction efficiency are investigated, which provides guidance for compounding nonlinear medium and evaluating limiting performance.