Three-dimensional theory of stimulated Raman scattering

Details Three-dimensional theory of stimulated Raman scattering Three-dimensional theory of stimulated Raman scattering

2009-03-05

arxiv.org/abs/0903.0989v1

Physics

Quantum Physics

21 pages 14 figures

Scientific paper

We present a three-dimensional theory of stimulated Raman scattering (SRS) or superradiance. In particular we address how the spatial and temporal properties of the generated SRS beam, or Stokes beam, of radiation depends on the spatial properties of the gain medium. Maxwell equations for the Stokes field operators and of the atomic operators are solved analytically and a correlation function for the Stokes field is derived. In the analysis we identify a superradiating part of the Stokes radiation that exhibit beam characteristics. We show how the intensity in this beam builds up in time and at some point largely dominates the total Stokes radiation of the gain medium. We show how the SRS depends on geometric factors such as the Fresnel number and the optical depth, and that in fact these two factors are the only factors describing the coherent radiation.

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