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Using phase dynamics in EIT to probe ground state relaxation in rubidium vapor

Using phase dynamics in EIT to probe ground state relaxation in rubidium vapor

Authors :
Hebin Li
Marlan O. Scully
V.A. Sautenkov
George R. Welch
Yuri V. Rostovtsev
Frank A. Narducci
J.P. Davis
Source :
Journal of Modern Optics. 56:975-979
Publication Year :
2009
Publisher :
Informa UK Limited, 2009.

Abstract

We have studied a time response of electromagnetically induced transparency (EIT) in a rubidium vapor to a rapid variation of optical phase. We have observed a very fast growth of the absorption when the phase of the optical field has been abruptly changed, followed by a slow return to the level of steady-state absorption. The recovery time decreases with increasing optical power. A simple theoretical analysis shows that under our experimental conditions the low power limit of the recovery time is determined by the ground relaxation time. In our case it is defined by a time-of-flight of rubidium atoms through laser beam. The obtained value of the ground state relaxation time is in a good agreement with result of direct measurements by ‘relaxation in the dark’ method. Our technique based on phase dynamics in EIT can be used for investigation of the ground state relaxation and the fast control of EIT.

Details

ISSN :
13623044 and 09500340
Volume :
56
Database :
OpenAIRE
Journal :
Journal of Modern Optics
Accession number :
edsair.doi...........70e87ae8983d1111260856e605f95fa7
Full Text :
https://doi.org/10.1080/09500340902836275