A5081189450- Atomic and Subatomic Physics Research
- Advanced MRI Techniques and Applications
- Quantum optics and atomic interactions
- Non-Invasive Vital Sign Monitoring
- Random lasers and scattering media
- Semiconductor Lasers and Optical Devices
- Advanced biosensing and bioanalysis techniques
- Advanced Fiber Optic Sensors
- Hemodynamic Monitoring and Therapy
- Cold Atom Physics and Bose-Einstein Condensates
- Spectroscopy and Laser Applications
- Biosensors and Analytical Detection
- Magneto-Optical Properties and Applications
- Mechanical and Optical Resonators
- Optical Polarization and Ellipsometry
- Geophysics and Sensor Technology
- Neural Networks and Reservoir Computing
- Analytical Chemistry and Sensors
Xi'an University of Architecture and Technology
2025
Beihang University
2022-2024
The cross-axis projection error (CAPE) caused by residual magnetic fields has recently attracted widespread attention. In this study, we propose a more specific theoretical model and expand the CAPE in gradient measurements. We first report that differences relaxation rate field between optically pumped magnetometers (OPMs) introduce significant term output of OPM gradiometers, referred to as phase error. Furthermore, when longitudinal compensation is inadequate, interaxial response...
The weak-value-amplification (WVA) effect, which is also called weak measurement, has been developed extensively in various sensing systems. Here, we report the actual realization of WVA effect spin-exchange relaxation-free atomic magnetometer system, wherein slight separation transverse momentum probe light amplified by introducing orthogonal pre- and post-selection states. A differential detector used to obtain position accurately real time. coupling magneto-optical interaction with atoms...
Abstract Single‐beam atomic magnetometers herald a new era of high‐precision magnetic field sensing, with applications spanning fundamental physics to biomagnetism. Nevertheless, their utility is often curtailed by quantum sensor noise, encompassing both technical and quantum‐mechanical noise. This research delves into the potential Kalman filter as tool subdue thereby augmenting sensitivity single‐beam magnetometers. Quantum‐mechanical noise integrated system model process measurement...
Distributed Bragg reflector (DBR) lasers are widely used in many physics experiments. However, regarding the power and frequency control of DBR lasers, obtaining complete accurate output characteristics is challenging due to need for general quantitative models. In this study, we propose validate a method based on Gaussian process regression quickly accurately establish laser wavelength model. Two models developed describe power, wavelength, input current, temperature. The findings show that...
We explore the impact of pumping beams with different transverse intensity profiles on performance spin-exchange relaxation-free (SERF) atomic magnetometers (AMs). conduct experiments comparing traditional Gaussian optically-pumped AM that utilizing flat-top (FTOP) method. Our findings reveal FTOP-based approach outperforms conventional method, exhibiting a larger response, narrower magnetic resonance linewidth, and superior low-frequency noise performance. Specifically, use FTOP method...
We propose a miniaturized single-beam optically pumped magnetometer (OPM) with laser power differential structure, along dynamically-adjusted detection circuit. This design enables the suppression of optical fluctuation noise and enhancement sensitivity. For OPM, pump light is significant contributor to output noise. To address this, we an OPM structure that separates as part reference signal before it enters cell. The current are then subtracted suppress introduced by fluctuations. achieve...
The dual-axis magnetic field measurement using atomic magnetometers is significant in scenarios with an uncertain direction. <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\pi $ </tex-math></inline-formula> -pulse resonance a pulse parametric that can realize by periodically flipping the electron spin. It difficult to determine, especially or fluctuating external fields, which seriously limits its scope...
In this paper, a hybrid algorithm to predict the wavelength drift induced by ambient temperature variation in distributed Bragg reflector semiconductor lasers is proposed. This combines global search capability of genetic (GA) and supermapping ability an extreme learning machine (ELM), which not only avoids randomness ELM but also improves its generalization performance. addition, tenfold cross-validation method employed determine optimal activation function number hidden layer nodes for...