Multiplexed optical storage and efficient demultiplexing of orbital angular momentum states in hot atoms

Le résumé fourni par la source

High-performance multiplexed quantum storage can reduce the number of storage units required for quantum communication and enhance quantum information processing. In this paper, we demonstrate the storage of orbital angular momentum (OAM)-multiplexed beams in rubidium vapor and retrieve the optical modes using an OAM mode splitter that integrates a Sagnac loop with two Dove prisms. We verified the feasibility of the experimental setup using a single OAM mode and found that OAM modes with different orders can be separated into distinct paths through the OAM mode splitter after storage, achieving a mode extinction ratio of over 85% at a storage duration of 500 ns. Furthermore, we achieved storing a multiplexed beam containing two OAM modes and demonstrating the effectiveness of this system for extracting multiplexed beams. We believe that the proposed scheme has the potential to advance the development of multimode quantum storage devices.

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