Accession Number:

ADA045955

Title:

Sensitive Laser Spectroscopy Measurement Technique.

Descriptive Note:

Technical rept.,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF IVAN A GETTING LABS

Personal Author(s):

Report Date:

1977-09-23

Pagination or Media Count:

24.0

Abstract:

A simple differential measurement technique is described by means of which a sensitive determination can be made of a change in the laser-beam signal resulting from absorption, scattering, or gain while traversing a medium. The method depends upon the use of an internally modulatable laser for implementation. Sensitivities of delta II sub 0 .0001 were routinely and unambiguously measured. Maximum sensitivity was measured at .00002. The method is applicable, in general, to steady phenomena or average value measurements. Two silicon photovoltaic detectors are employed in the differential measurement. The applicable wavelength domain of this technique is determined by the sensitivity range of the detectors, i.e., approximately 0.19 to 1.15 micrometers. Author

Subject Categories:

  • Optical Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE