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PHOTON ECHOES IN INHOMOGENEOUS STARK FIELD : A PULSE SEQUENCE ELIMINATING FREE FLIGHT EFFECTS

François Rohart, B. Macke

Published Jan 1, 1980• 0 citations
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Three Pulse Photon Echoes on an Inhomogeneously Stark Broadened Line at 3 mm-Wavelengths

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Abstract Three pulse photon echoes are studied when the prevailing inhomogeneous damping arises from the application of an inhomogeneous Stark field. Whereas the molecular free flight through the inhomogeneous Stark field entails a strong attenuation of conventional photon echoes, this effect is shown to be eliminated for the even numbered echoes of a Carr Purcell sequence. These predictions are well supported by a detailed experimental study at a 3 mm wavelength. Velocity changing collision influence is discussed and T1 and T2 relaxation times of the (J, |KM| = 1,1 → 2,1) rotational transition of CH3F are incidentally determined.

Zeitschrift für Naturforschung A•Sep 1, 1981•6 citations
A new method for sensing a structure of the stochastic, multi-mode laser pulse field and photon-correlation, chaotic features of atomic and nano-optical systems in this field is developed and a dynamics of multi-photon ionization in intense field is studied. As a basis for developing a new method for sensing stochasticity and chaotic features we use new quantum approach to calculation of the multi-photon resonances spectra characteristics for atomic systems in a stochastic laser field and the same field plus DC electric field. Some numerical illustrations regarding the multi-photon resonance spectra and stochasticity sensing for a number of atomic systems are presented.
Abstract Three pulse photon echoes are studied when the prevailing inhomogeneous damping arises from the application of an inhomogeneous Stark field. Whereas the molecular free flight through the inhomogeneous Stark field entails a strong attenuation of conventional photon echoes, this effect is shown to be eliminated for the even numbered echoes of a Carr Purcell sequence. These predictions are well supported by a detailed experimental study at a 3 mm wavelength. Velocity changing collision influence is discussed and T1 and T2 relaxation times of the (J, |KM| = 1,1 → 2,1) rotational transition of CH3F are incidentally determined.