Quantum Memory in an Orthogonal Geometry of Silenced Echo Retrieval

In this paper we experimentally realize a quantum-memory protocol based on retrieval of silenced echo (ROSE) in Tm3+:Y3Al5O12 crystal in an orthogonal geometry of the signal and control light fields. The silenced echo signal revival efficiency of ∼13% with 36 μs storage time is demonstrated. To achieve that we implemented a high-precision atomic coherence control via amplitude- and phase-modulated laser pulses. We also discuss capabilities of this configuration, ways to increase quantum efficiency and to combine it with a single-mode optical cavity.

ROSE in Tm:YAG, 4.4% efficiency,  lower graph doublepass  configuration and 13% efficiency

Reading and writing of 4 and 10 pulses with the efficiencies of 5.6% and 4.4% respectively.