We study the bandwidth and multiplexing capacity of an erbium-doped optical memory for quantum\nstorage purposes.We concentrate on the protocol revival of a silenced echo because it has the largest\npotential multiplexing capacity. Our analysis is applicable to other protocols that involve strong optical\nexcitation.We show that the memory performance is limited by instantaneous spectral diffusion\nand we describe how this effect can be minimized to achieve optimal performance.
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