Study of the absorption of pulsed CO2 laser radiation by air and by carbon dioxide
Abstract
Results are reported for an experimental study in which an optoacoustic technique was used to measure the nonlinearity of the absorption by air (containing trace amounts of CO2 and H2O) and by pure CO2 of pulsed CO2 laser radiation generated simultaneously on several rotational transitions. The absorptivities of air and CO2 were found to be nonlinear when the intensity of the laser radiation exceeded 0.2 MW/sq cm. The results are shown to confirm that the nonlinearity of atmospheric absorption in the lasing band of a CO2 laser should be taken into account in measurements of visual range in the atmosphere if the laser's radiant intensity is higher than 0.5 MW/sq cm.
- Publication:
-
Fizika
- Pub Date:
- October 1982
- Bibcode:
- 1982Fiz....25...49A
- Keywords:
-
- Acousto-Optics;
- Atmospheric Attenuation;
- Carbon Dioxide Lasers;
- Photoabsorption;
- Pulsed Lasers;
- Absorbers (Materials);
- Air;
- Carbon Dioxide;
- Luminous Intensity;
- Nonlinearity;
- Lasers and Masers