Quantum memory in the revival of silenced echo scheme in an optical resonator

The protocol of optical quantum memory in the revival of silenced photon echo (ROSE) scheme is experimentally implemented in a Tm³⁺ : Y₃Al₅O₁₂ crystal (c = 0.1 at. %) placed in an impedance-matched optical Fabry–Perot resonator. The input signal recovery efficiency of ~21% is achieved for a light pulse with a storage time of 36 μs. The main sources of loss and their impact on the achieved quantum efficiency are discussed, as well as the advantages of the implemented scheme and the possibilities of the further improvement of the main parameters of quantum memory.