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Proceedings Paper

Picosecond Phase Conjugation By Degenerate Four Wave Mixing In Alkali Vapours - A Method For Measuring Perturbation Times Of The Atomic Wavefunctions
Author(s): A. C. Cefalas; S. Spyrou; C. A. Nicolaides
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Paper Abstract

Phase conjugated waves via degenerate four wave mixing with picosecond laser pulses having a full width at half maximum (FWHM) of 80 ps have been observed in alcali vapours. The dephasing time of the 2P3/2 state in sodium was found to be 7.4 ns. This is the lifetime of the transient volume grating of the atomic states which are involved in the phase conjugated experiment. The average time of the perturbation of the atomic wave functions due to a "hot" collision (from a frequency modulation of a Markov type) was found to be 5x10-14 sec.

Paper Details

Date Published: 20 June 1989
PDF: 6 pages
Proc. SPIE 1031, 7th Intl Symp on Gas Flow and Chemical Lasers, (20 June 1989); doi: 10.1117/12.950567
Show Author Affiliations
A. C. Cefalas, National Hellenic Research Foundation (Greece)
S. Spyrou, National Hellenic Research Foundation (Greece)
C. A. Nicolaides, National Hellenic Research Foundation (Greece)

Published in SPIE Proceedings Vol. 1031:
7th Intl Symp on Gas Flow and Chemical Lasers

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