Analysis on eye safety of airborne atmosphere detection lidar and eye safety

According to American ANSI criterion, different laser pulse divergence angle and laser pulse’s eye-safe maximal energy ratio in altitude of 0 to 12 km are simulated. Two schemes about laser pulse’s eye-safe maximal energy distribution of 532 nm and 1 064 nm wavelength are provided: (1) laser beam divergence angle is 0.3 mrad, maximal threshold energy ratio of 532 and 1 064 nm lasers is 1∶2. (2) laser beam divergence angle is 0.4 mrad, maximal threshold energy ratio of 532 and 1 064 nm lasers is 1∶1. Signal-to-noise ratio for mode atmosphere detection using the two schemes are also analyzed. Analysis shows that the two schemes can ensure both eye safety on the ground and measuring quality.