engleski

Four-Wave Mixing with femtosecond pulses

Recent development of noncolinear optical parametric amplifiers (NOPA) equipped many laboratories with the widely tunable, spectrally broad ultrashort laser pulses with duration of 15 to 30 fs. The work deals with sub-20 fs pulsed Degenerate Four-Wave Mixing (DFWM) on high frequency vibrational levels in all-trans- carotene. The observed wave-packet motion on the electronic ground state revealed fast oscillating vibrational modes whose frequencies and the time development are measured . The coherent control in an open loop is demonstrated by appropriate phase shaping of the pulses.

femtosecond pulses; four-wave mixing; coherent control

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