Abstract

We experimentally investigate optical storage with electromagnetically induced transparency in a dense cold ${}^{85}\mathrm{Rb}$ atomic ensemble. By varying the optical depth (OD) from 0 to 140, we observe that the optimal storage efficiency has a saturation value of 50% as $\mathrm{OD}>50$. Our result is consistent with that obtained from hot vapor cell experiments.

© 2011 Optical Society of America

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