Modulation of the bidirectional scattered light field with a self-adaption genetic algorithm

Realizing high-fidelity optical information transmission through a scattering medium is of vital importance in both science and applications such as short-range fiber communication and medical imaging. Various techniques have been developed for light field modulation through a scattering medium. However, most proposed methods for the modulation of the scattering light field are aimed at single-directions, but there are few studies on multi-direction. Herein, we propose a self-adaption genetic algorithm (SAGA) that adaptively selects crossover or mutation in the evolution process. This method can effectively control the scattering light field in different directions for simultaneous focusing or image projection by generating binary amplitude patterns. Simulations and experiments are employed to demonstrate the effectiveness of the proposed method in the modulation of the scattering light field. In the experiment, SAGA can produce a bright focus and high-fidelity projection image without crosstalk through a few iterations. Moreover, the high fidelity of the projected images to their intended designs, evidenced by an average Pearson correlation coefficient of up to 0.81 in each direction within a few iterations, highlights the effectiveness of this approach.