TITLE

Saturation behavior in degenerate four-wave mixing with nonmonochromatic, non-Lorentzian fields

AUTHOR(S)
Tang, Y.; Reid, S. A.
PUB. DATE
November 1996
SOURCE
Journal of Chemical Physics;11/15/1996, Vol. 105 Issue 19, p8481
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report experimental studies of the degenerate four-wave mixing (DFWM) response in weak field (no saturation) and strong field (saturation) regimes for the case of nonmonochromatic, non-Lorentzian fields. The saturation behavior of line-center intensities and linewidths of rovibrational transitions in the ν3/ν2+ν4+ν5 Fermi dyad region of jet-cooled C2H2 are in good agreement with nondegenerate two-level saturation models, suggesting that the on-resonance DFWM response is weakly dependent on laser line shape. We find that DFWM line shapes in the weak field regime are determined by the infrared power spectrum and cubic intensity dependence, as illustrated using broadband (0.35 cm-1) and narrowband (0.04 cm-1) infrared radiation. The saturation intensity (I0sat) is observed to decrease with decreasing bandwidth, in qualitative agreement with theoretical predictions. © 1996 American Institute of Physics.
ACCESSION #
7645368

 

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