Abstract
High-contrast coherent population trapping signals were observed on the Cs line by use of a bichromatic linear polarized light ( field). A maximum absorption contrast of about 10% was obtained. This was nearly twice as high as that measured with the standard configuration of bichromatic circularly polarized light ( field). The results are compared with density matrix calculations of 4 and 5 level systems.
© 2009 Optical Society of America
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