A quantum molecular interferometer for measuring femtosecond laser pulses
- Lebedev Physics Institute, Moscow (Russian Federation)
- Tokyo Univ. Hongo (Japan)
- Research Lab. of the Physics of Crystals, Budapest (Hungary)
Electronic excitation of a molecule by a sequence of two phased femtosecond pulses is investigated. In this case, the intramolecular interference of vibrational wave packets induced by each individual pulse takes place. It is shown that the interference of wave packets makes it possible to measure the duration of femtosecond laser pulses owing to the effect of dynamic squeezing of a vibrational molecular state. In experiments, this can be performed by measuring the dependence of intensity of molecular fluorescence on the time interval between the pulses. The interference forms a sharp peak (or a dip) in this dependence, and its width is found to be equal to the laser pulse duration. A finite temperature of a medium is shown to be favorable for the conditions of an experiment on measurement of laser pulse duration. 23 refs., 1 fig.
- OSTI ID:
- 136069
- Journal Information:
- Optics and Spectroscopy, Vol. 79, Issue 2; Other Information: PBD: Aug 1995; TN: Translated from Optika i Spektroskopiya; 79: No. 2, 343-347(1995)
- Country of Publication:
- United States
- Language:
- English
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