Remote sensing using tunable lasers
Abstract
Summarizing the present situation of pollution monitoring by means of LIDAR it can be said that it is proven that the differential absorption method is the most sensitive technique known at present. TEA lasers are suitable light sources for a general application in the infra-red spectral region. The sensitivity which can be expected with those lasers allows to probe the atmosphere in the vicinity of chemical factories or other pollution sources over distances of about 3 km. Further improvements are possible e.g. by the use of heterodyne detection or by the use of frequency up-conversion for signal detection. A considerable step forward can still be expected when continuously tunable lasers as e.g. parametric oscillators of sufficient output are used for the measurements.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1977
- Bibcode:
- 1977STIN...7826439R
- Keywords:
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- Laser Applications;
- Pollution Monitoring;
- Remote Sensors;
- Heterodyning;
- Infrared Spectra;
- Sensitivity;
- Tea Lasers;
- Lasers and Masers