基于里德伯原子的长波授时信号高保真接收OA

Rydberg atoms exhibit exceptional sensitivity to long-wave electric fields,presenting a promising solution to the signal degradation that plagues ground-based long-wave time-service systems in remote or weak-signal regions.However,practical Loran-C signal reception using Rydberg-atom sensors is currently limited by fidelity deterioration,primarily caused by electrostatic shielding from vapor cell walls and frequency-doubling noise.In this work,we prepare Rydberg atoms via a two-photon excitation scheme and integrate them with a modulation transfer spectroscopy(MTS)and electromagnetically induced transparency(EIT)frequency-stabilization system.By employing a parallel-plate vapor cell subjected to a strong DC bias field,we leverage the DC Stark effect to precisely control the EIT resonance frequency shift,thereby overcoming the aforementioned limitations.This approach enables high-fidelity reception of Loran-C signals,accompanied by comprehensive time-and frequency-domain analyses.Quantitative measurements demonstrate a single-pulse fidelity of 98.0％and an envelope cycle difference(ECD)of 0.08 μs.Furthermore,by extracting and comparing the phase-reversal character-istics of odd-and even-period pulse trains,we rigorously verify the phase stability of the Rydberg-atom antenna.This work provides a robust technical foundation for the reception and demodulation of long-wave time-service signals using Rydberg-atom sensors,paving the way for next-generation,high-sensitivity monitoring and evaluation systems in navigation and timing infrastructure.