Attenuation of CO2-laser emission by diffuse evaporating aqueous aerosol
Abstract
A numerical solution is obtained to the problem of the time-dependent changes in the bulk attenuation coefficient of polydisperse aerosol diffuse evaporating in the emission field of a high-power CO2 laser. The characteristic times of changes in attenuation are found to range from 0.07 to 0.25 sec for a radiant flux density of 50 W/sq cm. The differential and integral efficiencies defining the effectiveness of laser action on the aerosol are analyzed, showing that the value of the integral efficiency does not exceed 45% and that it hardly varies in the transition from CW to pulsed operation.
- Publication:
-
Radiotekhnika i Elektronika
- Pub Date:
- November 1975
- Bibcode:
- 1975RaEl...20.2241G
- Keywords:
-
- Aerosols;
- Atmospheric Optics;
- Carbon Dioxide Lasers;
- Light Transmission;
- Photoabsorption;
- Aqueous Solutions;
- Attenuation Coefficients;
- Continuous Wave Lasers;
- Evaporation;
- Infrared Lasers;
- Pulsed Lasers;
- Time Dependence;
- Wave Attenuation;
- Communications and Radar