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Atomic density disturbance rejection in atomic gyroscopes via faraday polarimetric decoupling 认领 引用
1
作者 Zehua Liu Yifan Yan +5 位作者 Haoying Pang Xinhui Liu Jixi Lu Xusheng Lei Zhuo Wang Wei Quan 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第1期1-10,共10页
Atomic spin gyroscopes are promising candidates for next-generation inertial navigation due to extremely high theoretical precision,relatively small size among atomic gyroscopes,and promising potential for miniaturiza... Atomic spin gyroscopes are promising candidates for next-generation inertial navigation due to extremely high theoretical precision,relatively small size among atomic gyroscopes,and promising potential for miniaturization.In particular,the spin-exchange relaxation-free(SERF)atomic gyroscope relies on optical pumping to polarize atoms,enabling rotation sensing through the Faraday optical rotation angle(FORA).However,fluctuations in atomic density introduce systematic errors in FORA measurements,limiting long-term stability.We present a data-driven decoupling method that isolates atomic density fluctuations from the FORA signal by modeling spatially resolved light absorption in the vapor cell.The model accounts for the spatial distribution of spin polarization in the pump-light interaction volume,density-dependent relaxation rates,wall-induced relaxation,and polarization diffusion,and is implemented within a finite-element framework.Compared to the conventional Lambert-Beer law,which assumes one-dimensional homogeneity,our approach captures the full threedimensional density and polarization distribution,significantly improving the accuracy of light absorption modeling.The resulting absorption-density maps are used to train a feedforward neural network,yielding a high-precision estimator for atomic density fluctuations.This estimator enables the construction of a decoupling equation that separates the density contribution from the FORA signal.Experimental validation shows that this method improves the bias instability atσ(100 s)of the gyroscope was improved by 73.1%compared to traditional platinum-resistance-based stabilization.The proposed framework is general and can be extended to other optical pumping-based sensors,such as optically pumped magnetometers. 展开更多
关键词 Atomic gyroscope SERF gyroscope Atomic density Optically pumped sensors
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Suppression of laser power error in a miniaturized atomic co-magnetometer based on split ratio optimization 认领 引用
2
作者 张伟佳 范文峰 +1 位作者 范时秒 全伟 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第3期180-186,共7页
A miniaturized atomic spin-exchange relaxation-free(SERF)co-magnetometer measures angular velocity using a balanced polarimetry technique which is easily affected by the laser power.A laser power closed-loop control s... A miniaturized atomic spin-exchange relaxation-free(SERF)co-magnetometer measures angular velocity using a balanced polarimetry technique which is easily affected by the laser power.A laser power closed-loop control system is usually used to suppress the fluctuation of the laser power.Although this method can greatly eliminate the fluctuation of the in-loop laser power(the feedback laser),it cannot fully eliminate the fluctuation of the out-of-loop laser power(the signal measurement laser).This leads to SERF gyroscope laser power error,which reduces the inertial measurement accuracy.In this paper,the influence mechanism of the split ratio(the ratio of the in-loop laser power to the out-of-loop laser power)on the out-of-loop laser power control accuracy is analyzed by establishing a laser power transmission model inside and outside the loop.Moreover,a method is developed to improve the out-of-loop laser power stability by optimizing the split ratio.Comparative experiments showed that the relative Allan standard deviation of the out-of-loop laser power decreased from 5.48×10-6to 2.62×10-6at 100 s,and decreased by an order of magnitude from 1.76×10-5to 3.30×10-6at1000 s.Correspondingly,the rate ramp coefficient in the Allan standard deviation curve of the SERF gyroscope test data decreased from 1.312[(°/h)/h]to 0.246[(°/h)/h].And the bias stability increased from 0.032°/h to 0.019°/h.Therefore,the proposed method can improve the long-term stability of the probe laser power and effectively suppress the laser power error of the SERF gyroscope. 展开更多
关键词 atomic gyroscope spin-exchange relaxation-free laser power stability error suppression
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Continuous Dynamic Rotation Measurements Using a Compact Cold Atom Gyroscope 认领 引用 被引量：16
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作者 姚战伟 鲁思滨 +4 位作者 李润兵 王锴 曹雷 王谨 詹明生 《Chinese Physics Letters》 SCIE EI CAS CSCD 2016年第8期41-44,共4页
We present an experimental demonstration of the rotation measurement using a compact cold atom gyroscope. Atom interference fringes are observed in the stationary frame and the rotating frame, respectively. The phase ... We present an experimental demonstration of the rotation measurement using a compact cold atom gyroscope. Atom interference fringes are observed in the stationary frame and the rotating frame, respectively. The phase shift and contrast of the interference fringe are experimentally investigated. The results show that the contrast of the interference fringe is well held when the platform is rotated, and the phase shift of the interference fringe is linearly proportional to the rotation rate of the platform. The long-term stability, which is evaluated by the overlapped Allan deviation, is 8.5 × 10^-6 rad/s over the integrating time of 1000s. 展开更多
关键词 of on as is in Continuous Dynamic Rotation Measurements Using a Compact Cold Atom Gyroscope
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Ultracold-atom gyroscope based on a spiral Bessel beam 认领 引用
4
作者 XIN LV ZHAOYING WANG QIANG LIN 《Photonics Research》 SCIE EI CAS CSCD 2026年第5期2121-2127,共7页
The Sagnac interferometer for angular-velocity metrology is a hot field in precision measurement.How to increase the area of its interference loop is one of its important concerns.In this paper,we design an ultracold-... The Sagnac interferometer for angular-velocity metrology is a hot field in precision measurement.How to increase the area of its interference loop is one of its important concerns.In this paper,we design an ultracold-atom gyroscope by using a far-off-resonance,steerable Bessel optical dipole trap.The standing-wave Bragg beams split,reflect,and recombine the Bose-Einstein condensate packets.Concurrently,the Bessel guide drives a helical,quasi-free trajectory.The key advance of our proposal is that optical guiding enables stable multi-orbit operation in a programmable helical waveguide,providing a scalable route to enhance the effective Sagnac area within a compact footprint. 展开更多
关键词 increase area its interference loop spiral Bessel beam precision measurementhow bessel optical dipole trapthe bessel guide optical guid ultracold atom gyroscope sagnac interferometer
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