Quantum Sensor Resonance Frequency Measurement via EIT
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Solution Overview
Problem
Current methods for measuring resonance frequencies of quantum sensors are inefficient and lack scientific precision, leading to unreliable and non-reproducible results due to complex optical links and cumbersome operation procedures.
Innovation Solution
A system and method utilizing multi-photon excitation, comprising a probe laser module, coupling laser module, quantum sensor, fast measurement module, and measurement and calculation module, which applies RF electromagnetic signals to induce EIT signals and calculate resonance frequencies through frequency gap analysis, enabling precise and quantitative measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic wave frequency is calculated through frequency sweep at specific electric field strength, then approximate frequency data is obtained, but measurement precision is limited
Solution Approach 1:
The patent changes the measurement parameter from direct frequency sweep to detecting frequency gap between EIT signal peaks. By using the relationship between frequency gap and RF electromagnetic signal frequency, the system achieves high measurement precision without complex frequency sweeping procedures
Solution Approach 2:
The patent introduces EIT signal as an intermediary to measure RF electromagnetic signal frequency. Instead of directly measuring RF frequency through complex sweeps, the system uses optical EIT signals whose peak frequency gap directly reflects the RF frequency, simplifying the measurement process
2Ease of operation
If frequency sweep method is used to obtain approximate frequency data, then measurement can be performed, but operation procedures are cumbersome
Solution Approach 1:
The patent skips the time-consuming frequency sweep process by directly measuring the frequency gap between EIT signal peaks. This allows rapid determination of resonance frequency without performing exhaustive frequency scans, significantly reducing measurement time
Solution Approach 2:
The patent replaces the mechanical frequency sweep process with an optical measurement approach. Instead of mechanically adjusting and sweeping through frequencies, the system uses optical EIT signals to directly indicate the frequency information through peak positioning
3Reliability
If coarse measurement method is used, then measurement can be completed, but scientific and quantitative measurement and evaluation cannot be implemented
Solution Approach 1:
The patent implements a feedback mechanism where the measured frequency gap between EIT signal peaks is used to determine the RF electromagnetic signal frequency. This feedback loop ensures that the measurement is scientifically grounded and quantitatively accurate, improving both reliability and precision
Solution Approach 2:
The patent utilizes the resonance phenomenon (a form of vibration) of atoms in the quantum sensor when exposed to RF electromagnetic signals. By detecting the frequency gap in EIT signals that corresponds to this resonance, the system achieves scientifically valid and quantitatively precise measurements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a simple, efficient, and scientifically valid method for measuring resonance frequencies, enhancing the reliability and repeatability of quantum sensor performance.
Implementation Method 1
the quantum sensor includes a gain medium (alkali metal atomic vapor) that effectively acts on electromagnetic waves with the same frequency through electromagnetically induced transparency (EIT) effect
Implementation Method 2
Autler-Townes splitting of probe microwaves
Data Source
AI summary
The present disclosure provides a system and method for measuring resonance frequencies of a quantum sensor based on multi-photon excitation. The system includes a probe laser module, a coupling laser module, a quantum sensor, a fast measurement module, an experimental signal source, and a measurement and calculation module. The experimental signal source directly faces the quantum sensor, and is configured to transmit a RF electromagnetic signal to the quantum sensor. The quantum sensor includes a closed glass cavity. An alkali metal atomic vapor is enclosed in the glass cavity. The probe laser module is connected to one side of the quantum sensor, and the coupling laser module is connected to the other side of the quantum sensor through the fast measurement module.