Weak collisions in strong-field effects

M. G. Stepanov, D. A. Shapiro

Research output: Contribution to journalConference articlepeer-review


An analytical expression is found for the profile of Bennett hole with different level lifetimes under strong field and weak collisions. The expression is valid while the diffusion and field broadening being more than the homogeneous one, but less than the thermal width. It is shown that the square of the total width being equal to the sum of the squares of the diffusion and field widths. The shape of saturation curve is calculated including weak collisions. The formula obtained describes the smooth transition from homogeneous to inhomogeneous saturation throughout the new intermediate region. Probe-field spectrum of the three-level system is computed in the presence of the strong field at the adjacent transition. The Autler-Townes doublet components are shown to broaden and repel each other under the collisions. The main reason of both the effects occurs to be the diffusion of phase due to quadratic frequency shift.

Original languageEnglish (US)
Pages (from-to)232-241
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Oct 21 1998
Event11th International Vavilov Conference on Nonlinear Optics 1997 - Novosibirsk, Russian Federation
Duration: Jun 24 1997Jun 28 1997


  • Coulomb scattering
  • Nonlinear spectroscopy
  • Saturation
  • Strong field

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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