Consideration of selective and nonselective absorption by water vapor and ozone when sounding atmospheric organic aerosol with a CO2 laser-based IR lidar

Accounting for molecular absorption of laser radiation in the range from UV to mid-IR region on the paths of lidar sounding of gas-aerosol pollution in the atmosphere

“…To estimate the absorption of laser radiation and the backscattering signal along the sounding paths, calculations were carried out in separate sections of the optical range 0.2-12 μm, taking into account the contribution of atmospheric water vapor and ten following gases: CH 4 (75.0), CO (4.295), C 2 H 4 (2.574), NH 3 (0.282), CO 2 (400.0), O 3 (0.027), H 2 S (0.00568), NO 2 (0.16), C 2 H 6 (40.0), SO 2 (0.19) with maximum permissible concentrations of pollutants (single dose in atmospheric condition, ppm) (see the Table 1 [20]).…”

“…Figure 5 presents the calculation of optical depth value of atmospheric water vapor in comparison with the most influential substances in these spectral ranges at concentrations equal to MPC for the atmosphere under normal conditions. The values at the frequencies corresponding to the laser CO 2 -lines are given also (generation lines taken from [20]). See more details about accounting of water vapor absorption at these and other spectral ranges in [21].…”

High frequency capacitive discharge pumped Cu+Ne laser

“…Today, lasers are an effective tool for solving a wide range of modern problems [1][2][3][4][5] . Improving their lasing characteristics, expanding the spectral range, and increasing the efficiency of converting pump energy into radiation energy remains an important task in such a branch of science as laser physics.…”