Attenuation Characteristics of Laser Fuzes in Low-Visibility Dust Environments

To address the issue of multiple scattering in the propagation of laser fuzes in low-visibility dusty environments, an experiment was conducted to measure the transmittance of laser in such conditions. The corresponding attenuation coefficient was derived based on the Beer-Lambert law. The results indicate that in low-visibility conditions, laser energy attenuates more severely in a dusty environment, with the attenuation coefficient decreasing exponentially as visibility decreases. For instance, at a visibility of 50m, the attenuation coefficient is 192dB/km, and at a visibility of 100m, it is 85dB/km. The experimental results were compared with independent scattering Mie theory calculations and Monte Carlo simulations that consider multiple scattering effects. The findings show significant discrepancies between the experimentally measured attenuation coefficients and Mie theory predictions under low-visibility conditions, whereas the differences with Monte Carlo simulation results, which account for multiple scattering and dust particle shape factors, are smaller. However, the Monte Carlo results are still lower than the experimental measurements in low-visibility conditions. The study concludes that when dust visibility is below approximately 200m, laser transmission simulations must consider multiple scattering and other influencing factors.