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Lookup NU author(s): Dr Gareth Roberts
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The ac-Stark shift of the A 2∑÷ n′ = 2 ← X 2πrn″ = 0 two-photon Bohr resonance of nitric oxide at 409.8 nm is utilized to autocorrelate intense, ultrashort optical pulses at 400 nm. When they are temporally and spatially overlapped, two identical pulses shift the absorption into transient resonance with the applied two-photon energy. Interferometrio autocorrelation traces are obtained by detection of A 2∑+ n′ = 2 → X 2πr, n″ 2 fluorescence as a function of the time delay between the two pulses: The method is background free and highly nonlinear. Experimental measurements are simulated through solutions to the time-dependent Schrb'dinger equation for one-dimensional motion of an electron in an electric field, which procedure yields a measure of the incident pulse width. © 2002 Optical Society of America.
Author(s): Schmidt TW, Feurer T, Lopez-Martens RB, Roberts G
Publication type: Article
Publication status: Published
Journal: Journal of the Optical Society of America B: Optical Physics
Year: 2002
Volume: 19
Issue: 8
Pages: 1930-1940
ISSN (print): 0740-3224
ISSN (electronic): 1520-8540
Publisher: Optical Society of America
URL: http://dx.doi.org/10.1364/JOSAB.19.001930
DOI: 10.1364/JOSAB.19.001930
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