SIMULATION STUDY ON TRANSMISSION CHARACTERISTICS OF COHERENT LASER ARRAY BASED ON MATLAB

Lasers are commonly used instruments in physical experiments, and it is generally believed that laser beams are Gaussian beams. The properties of Gaussian beams are one of the important contents of optical courses. At present, coherent synthesis technology has become an effective technical solution to obtain higher brightness laser output and is also a hot topic of research at home and abroad. However, coherent array lasers are the result of coherent superposition and diffraction transmission of laser beams, and no longer satisfy the Gaussian propagation equation. This paper applies Matlab software programming to conduct virtual simulation experiments for precise simulation and visualization of coherent array laser beams and their transmission. By establishing coherent synthesis models of laser arrays with square, hexagonal, and centered square arrangements, it demonstrates the dynamic process of multibeam laser coherent superposition evolving from near-field interference fields to far-field multilobe diffraction fields. It also analyzes the impact of arrangement and filling factor on the farfield distribution, especially the concentration of energy, which can help students intuitively perceive and understand the frontier knowledge of coherent array lasers, and at the same time deepen the understanding of basic optical knowledge. The results of this paper can form a consolidation and beneficial supplement to classroom teaching, and have certain significance for promoting the integration of teaching and research, expanding optical teaching, and stimulating students' interest.