Accession Number:

AD0730770

Title:

Comparison of Laser Methods for the Remote Detection of Atmospheric Pollutants,

Descriptive Note:

Corporate Author:

STANFORD UNIV CALIF MICROWAVE LAB

Personal Author(s):

Report Date:

1971-01-01

Pagination or Media Count:

98.0

Abstract:

The paper discusses and compares three methods of remote air pollution detection Raman backscattering, resonance backscattering, and resonance absorption. Theoretical expressions are derived for the minimum detectable pollutant concentration and in each case the depth resolution and the problems of interference, pump depletion, and background noise are discussed. The paper also includes a brief discussion of possible laser sources and gives numerical examples of the detectabilities based on present technology. The atmospheric transparency limits the useful range to a few kilometers for the Raman and resonance backscattering schemes. For the resonance absorption technique the useful range can be as great as fifty kilometers. Author

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy
  • Optics
  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE