Nonlinear propagation of strong multi-mode fields
2003 (English)In: Journal of Physics B: Atomic, Molecular and Optical Physics, ISSN 0953-4075, E-ISSN 1361-6455, Vol. 36, 3761-3774 p.Article in journal (Refereed) Published
We develop a strict theory of nonlinear propagation of few interacting stronglight beams. The key idea of our approach is a self-consistent solution ofthe nonlinear wave equation and the density matrix equations of the materialbeyond the rotatory wave approximation. We assume a Fourier expansion ofthe density matrixwhich goes beyond the conventionalTaylor expansions of thepolarization over the field amplitudeswhich is inadequate for the field strengthsthat we are interested in. Two qualitatively different situations are considered,with and without phase matching. Unlike in our previous paper (Baev et al2003 J. Opt. Soc. Am. B at press) devoted to the three-photon (TP) absorptioninduced upconverted lasing, we obtain here a strict solution for the nonlinearinteraction between different light beams. The general theory is applied to anumerical study of the role of saturation in TP photoabsorption by an organicchromophore in solution.
Place, publisher, year, edition, pages
2003. Vol. 36, 3761-3774 p.
2-photon excitation, absorption, dynamics, memory, pulses, media
IdentifiersURN: urn:nbn:se:kth:diva-5485DOI: 10.1088/0953-4075/36/18/305ISI: 000185966200006OAI: oai:DiVA.org:kth-5485DiVA: diva2:9868
QC 201009062006-03-152006-03-152012-04-04Bibliographically approved