Solid-state Raman quantum memory in whispering gallery mode resonators: signal-to-noise ratio
Kazan Federal University, 18 Kremlevskaya str., Kazan, 420008 Russia
2 Kazan E. K. Zavoisky Physical-Technical Institute, 10/7 Sibirsky tract str., Kazan, 420029 Russia
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Published online: 31 October 2017
The possibility of implementation of optical quantum memory via off-resonant Raman absorption and emission of single-photon pulses in rare-earth-ion-doped crystals is theoretically analysed taking into account signal-to-noise ratio at the output of the memory device. The crystal 143Nd3+:Y7LiF4 is considered as an example. It is shown that the signal-to-noise ratio can exceed unity for single-photon input pulses provided that storage and retrieval of them is performed in the doped crystals forming a microcavity such as whispering gallery mode resonator.
© The Authors, published by EDP Sciences, 2017
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