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High-dimensional frequency conversion in a hot atomic system
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DOI：10.3788/COL202321.092701.png)
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One of the major difficulties in realizing a high-dimensional frequency converter for conventional optical vortex (COV) modes stems from the difference in ring diameter of the COV modes with different topological charge numbers l. Here, we implement a high-dimensional frequency converter for perfect optical vortex (POV) modes with invariant sizes by way of the four-wave mixing (FWM) process using Bessel-Gaussian beams instead of Laguerre-Gaussian beams. The measured conversion efficiency from 1530 to 795 nm is independent of l at least in subspace l is an element of{-6, . . . , 6}, and the achieved conversion fidelities for two-dimensional (2D) superposed POV states exceed 97%. We further realize the frequency conversion of 3D, 5D, and 7D superposition states with fidelities as high as 96.70%, 89.16%, and 88.68%, respectively. The proposed scheme is implemented in hot atomic vapor. It is also compatible with the cold atomic system and may find applications in high-capacity and long-distance quantum communication.
Keyword:
high dimension
frequency conversion
four-wave mixing
perfect optical vortex
期刊
IF:
3.3
论文数:
4.0W
被引数:
7.6W
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