Accession Number : AD0661203

Title :   STIMULATED RAMAN SPECTROSCOPY IN HYDROGEN GAS.

Descriptive Note : Technical rept.,

Corporate Author : HARVARD UNIV CAMBRIDGE MASS DIV OF ENGINEERING AND APPLIED PHYSICS

Personal Author(s) : Lallemand,P. ; Simova,P.

Report Date : SEP 1967

Pagination or Media Count : 31

Abstract : In most substances which exhibit the stimulated raman effect under high intensity laser excitation, the presence of self-focusing makes quantitative measurements almost impossible. It is shown that in hydrogen gas, which has a very high self-focusing threshold, the stimulated raman effect in an amplifier behaves according to the simple parametric theory. The frequency sharpening in the stimulated emission is used to make a quantitative study of the line shift of the Q(1) vibrational line of H2 as a function of pressure, temperature and foreign gas admixture. Some of these results are then used to measure the line width of the Q(1) line in a raman amplifier. Results are presented of these experiments and other cases are discussed in which the stimulated raman effect can be used to yield information about the scatterer. (Author)

Descriptors :   (*HYDROGEN, *RAMAN SPECTROSCOPY), LINE SPECTRA, EMISSIVITY, LASERS, SCATTERING, AMPLIFIERS

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE