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Article Abstract
Sensing of the microwave (MW) electric field with high accuracy and large power dynamic range has assisted in the implementation of metrology and communication. Here, an atom-based MW sensing system with a large linear power dynamic range for an electric field in the C band of 6.835 GHz is demonstrated in a vapor cell. The Rydberg electromagnetically induced transparency (EIT) spectra involving 53D state are employed to measure the medium intensity electric field by AC stark effect. On this basis, the heterodyne method, adding an auxiliary local oscillator (LO) MW field as a gain, is employed to measure the weak electric field. Finally, the strong electric field sensing is achieved by the atomic Rabi resonance when the coupling laser is turned off. As a result, the MW electric field measurements with a large linear power dynamic range of 101.6 dB are reached in a vapor cell by using multi-cooperative measurement methods. This work provides an effective approach for realizing the quantum MW sensing with high sensitivity and large power dynamic range.
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