Monte Carlo method for the analysis of laser safety for a high-powered lidar system under different atmospheric conditions

Abstract

1A major concern of high-powered atmospheric lidar systems is eye safety. Atmospheric lidars are often run unattended in adverse weather conditions where scattering redirects laser energy from the main beam. These naturally varying "soft targets" (such as fog and precipitation) are not accounted for in ANSI standards but, through multiple scattering events, can potentially create adverse viewing conditions. This . In all cases, the ANSI calculated NOHD and NHZ are larger than the hazard zones that include scattering but the size of the zones is inextricably linked to the type of scattering ignored in the standard NOHD and NHZ calculations.

The Link Attenuation Model Based on Monte Carlo Simulation for Laser Transmission in Fog Channel

“…Secondly, the influence of receiving parameters on link attenuation has not been analyzed which made the estimation deviations were eventually not fall within the acceptable range for link budget analysis. [8,[10][11][12][13] The multiple scattering process will cause the spot space to expand, the divergence angle to diffuse and the time domain to expand for the pulse signal. Different receiving parameters, such as receiving aperture and receiving field-of-view, will cause different link attenuation [14].…”