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To achieve multi-channel parallel transmission of complex signals and enhance spectral efficiency, this study presents a Rydberg atomic antenna system capable of demonstrating multiplexed communication schemes. Using 852-nm and 509-nm lasers, cesium atoms are excited to Rydberg states within a vapor cell, while differential detection techniques are employed to suppress common-mode noise, enabling high signal-to-noise ratio (SNR) Electromagnetically Induced Transparency (EIT) spectroscopy. Under weak electric field conditions, microwave field coupling induces atomic energy level shifts, leading to two-photon detuning and rendering the EIT transmission intensity nearly linearly dependent on the microwave electric field strength. Base on this effect, an integrated electrode configuration inside the atomic cell introduces time-varying electric fields, enabling measurements of waveform, amplitude, and frequency for both microwave and low-frequency electric fields.Building upon this principle, we decompose complex chaotic signals into three-dimensional orthogonal electric field components to demonstrate time-division multiplexing (TDM) of three-channel signals. Concurrently, frequency-division multiplexing (FDM) is realized by modulating the three channels with carriers at 3 kHz, 5 kHz, and 4 kHz, respectively. Quantitative analysis of correlation parameters between transmitted and reference signals reveals high-fidelity reconstruction, with achieved fidelity levels of 95% for TDM and 90% for FDM. These results validate the feasibility of complex signal waveform reconstruction using optical atomic antennas and underscore the potential of Rydberg-based systems for high-performance electromagnetic field sensing and communication applications.
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Keywords:
- Rydberg atomic antenna /
- electromagnetically induced spectroscopy /
- signal transmission /
- three-dimensional chaotic signals
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