A system and method for preparing a Rydberg state based on orthogonal polarization detection and dual-wavelength in-situ frequency stabilization
By employing dual-wavelength co-room frequency stabilization and orthogonal polarization detection techniques, the problems of system complexity and low signal-to-noise ratio in Rydberg state preparation were solved, achieving simplified architecture and high signal-to-noise ratio Rydberg atom preparation.
CN122149644APending Publication Date: 2026-06-05HANDAN INNOVATION INST OF PEKING UNIV +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HANDAN INNOVATION INST OF PEKING UNIV
- Filing Date
- 2026-03-05
- Publication Date
- 2026-06-05
AI Technical Summary
Technical Problem
Existing Rydberg state preparation techniques suffer from complex system architecture, high cost, difficulty in detecting coupled optical frequency-stabilized signals, and low signal-to-noise ratio.
Method used
The dual-wavelength common-room frequency stabilization technology is adopted to achieve synchronous frequency stabilization of the probe light and the coupling light through nonlinear cross-modulation transfer effect. Orthogonal polarization detection technology is used to extract the signal, suppress laser noise, and improve the signal-to-noise ratio.
Benefits of technology
The system architecture was simplified, the cost was reduced, the signal-to-noise ratio of the coupled light was improved, and efficient and high-purity Rydberg atom preparation was achieved.
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Figure CN122149644A_ABST
Abstract
The application discloses a kind of preparation system and method of Rydberg state based on orthogonal polarization detection and dual-wavelength in-room frequency stabilization, belong to quantum optics and precise measurement field.System includes: atomic gas chamber, first / second wavelength laser, modulation transfer spectrum frequency stabilization unit, dual-wavelength in-room coupling unit, orthogonal polarization detection unit and servo feedback control system.Method by modulation transfer spectrum locking probe light frequency;By dual-wavelength in-room coupling, modulation information is transferred to coupling light across wavelength;By orthogonal polarization detection, the polarization state change caused by the interaction of coupling light and atom resonance is extracted, error signal is generated and coupling light frequency is locked.The core of the application is: only resonance atom causes coupling light field polarization state rotation, non-resonant atom has no contribution;By polarimeter to the polarization component of outgoing light screening, only extract the polarization rotation signal produced by resonance atom, effectively suppress the high DC background noise of laser itself, greatly improve signal purity and signal-to-noise ratio.
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