Theory of spectra of coherent four-photon scattering with one-photon resonances due to excited and autoionizing atomic states

Nikolai I. Koroteev; A. N. Naumov; Alexei M. Zheltikov

doi:10.1117/12.239788

10 May 1996 Theory of spectra of coherent four-photon scattering with one-photon resonances due to excited and autoionizing atomic states

Nikolai I. Koroteev, A. N. Naumov, Alexei M. Zheltikov

Author Affiliations +

Proceedings Volume 2797, Nonlinear Spectroscopy and Ultrafast Phenomena; (1996) https://doi.org/10.1117/12.239788
Event: International Conference on Coherent and Nonlinear Optics, 1995, St. Petersburg, Russian Federation

Abstract

Coherent four-photon scattering of light due to excited and autoionizing states of atomic systems is considered. We analyze the influence of one-photon resonances at the frequency of the anti-Stokes signal and at the frequency of the pump wave on the shape of the spectrum of four-photon scattering. We derive analytical expressions for the line shapes of four-photon scattering involving one-photon resonances with allowance for phase-matching conditions and variation in the populations of excited states for limiting regimes of tight focusing and strong absorption in a medium with a cubic nonlinearity. The calculated spectra of four-photon scattering include the interference of resonant and nonresonant components of the third-order nonlinear susceptibility with allowance for one-photon saturation. We develop a method for normalizing experimental spectra of four-photon scattering with one-photon resonances that takes into account distortion of spectral lines due to the influence of phase mismatch and one- photon absorption.

Citation Download Citation

Nikolai I. Koroteev, A. N. Naumov, and Alexei M. Zheltikov "Theory of spectra of coherent four-photon scattering with one-photon resonances due to excited and autoionizing atomic states", Proc. SPIE 2797, Nonlinear Spectroscopy and Ultrafast Phenomena, (10 May 1996); https://doi.org/10.1117/12.239788

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