Abstract
By means of a N2-laser pumped dye-laser (P L ≈20kW, Δv L < 10 GHZ) different two-photon resonant four-wave coupling processes in Ba vapour (n Ba≈1016 cm−3) using the Ba states 6s8s 1 S o and 7s5d 1 D 2 were investigated. Coherent line radiation with conversion rates up to 10−3 was generated within the range of λ=190–200 nm by sumfrequency mixingv UV=2v 1+v 2 of 3 laser photons and within the range of λ=250–380 nm by couplingv UV=2v 1±v IR of 2 laser photons with one photonv IR stimulated emitted in laser-induced Ba transitions. For the second coupling type the various nonlinear processes contributing to the formation of the coupling components are discussed. The power of the UV-component as function of inensity and resonance detuning of the laser as well as on the phase-mismatch was calculated on the basis of the small signal theory and compared to the experimental data.
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References
H. Scheingraber, C.R. Vidal: Phys. Rev. A18, 2585 (1978)
G.C. Bjorklund, J.E. Bjorkholm, R.R. Freeman, P.F. Liao: Appl. Phys. Lett.31, 330 (1977)
W. Hartig: Appl. Phys15, 427 (1978)
A. Corney, K. Gardner: J. Phys. B12, 1425 (1979)
B.J. Orr, J.F. Ward: Mol. Phys.20, 513 (1971)
H. Puell, C.R. Vidal: Phys. Rev. A14, 2225 (1976)
B.M. Miles, W.L. Wiese: NBS Techn. Rep. 474 (1969)
D.S. Bethune, R.W. Smith, Y.R. Shen: Phys. Rev. Lett.37, 431 (1976)
I.I. Sobelmann:Atomic Spectra and Radiative Transitions, Springer Series Chem. Phys.1 (Springer, Berlin, Heidelberg New York 1979)
A. Weber (ed.):Raman Spectroscopy of Gases and Liquids, Topics in Current Phys.11 (Springer, Berlin, Heidelberg, New York 1979)