Laser propagation is a research area that focuses on the study of how laser beams travel through different mediums and environments. This includes examining the effects of atmospheric conditions, such as turbulence and scattering, on the quality and efficiency of laser propagation. Researchers in this field also investigate techniques to improve laser propagation, such as adaptive optics and beam shaping, to increase the transmission distance and accuracy of laser communication and sensing systems. Overall, the goal of laser propagation research is to enhance the performance and reliability of laser-based technologies in various applications, including telecommunications, remote sensing, and military defense.