Accession Number : ADP008282

Title :   Kinetics of Hole Burning in Inhomogeneously Broadened Spectra: the Origin of Nonexponentiality and Problem of Burning Efficiency,

Corporate Author : AKADEMIYA NAUK SSSR MOSCOW

Personal Author(s) : Al'shits, E. I. ; Kharlamov, B. M. ; Ulitsky, N. I.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : High inhomogeneous broadening of impurity spectra in amorphous media reflects one type of dispersion, characteristic for disordered systems: dispersion of electronic transition frequency. In Principle, there can exist a pronounced dispersion of other parameters: homogeneous line width (gamma), Debye-Waller factor (alpha), hole burning efficiency(phi), etc. The problem of the burning efficiency dispersion (BED) was extensively discussed in the recent years ( and references therein). The nonexponentiality of the burning kinetics was treated in some publication as an evidence of such dispersion. But burning kinetics is always nonexponential in strongly inhomogeneously broadened systems, if a burning laser line width delta nu sub l is much less then gamma. That was found experimentally and treated theoretically in one of the first publications on a hole burning. All Other sources of the nonexponentiality are, in facts additional to this one. So, it's not easy to attain experimentally the BED parameters on such background. The procedure of a numerical fitting of the burning kinetic with BED, developed in, is correct, but it looks unreliable due to many fitting parameters.

Descriptors :   *KINETICS, *SPECTRA, DISPERSIONS, EFFICIENCY, ELECTRONICS, FITTINGS, IMPURITIES, LASERS, MEDIA, PARAMETERS, TRANSITIONS, WIDTH, HOMOGENEITY, FREQUENCY.

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Solid State Physics
      Optics
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE