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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2022
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2210.15346 |
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| _version_ | 1866929313999224832 |
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| author | Meng, Zhi-Xin Yan, Pei-Qiang Wang, Sheng-Zhe Li, Xiao-Jie Xue, Hong-bo Feng, Yan-Ying |
| author_facet | Meng, Zhi-Xin Yan, Pei-Qiang Wang, Sheng-Zhe Li, Xiao-Jie Xue, Hong-bo Feng, Yan-Ying |
| contents | We demonstrate a closed-loop light-pulse atom interferometer inertial sensor that can realize continuous decoupled measurements of acceleration and rotation rate. The sensor operates with double-loop atom interferometers, which share the same Raman light pulses in a spatially separated Mach-Zehnder configuration and use continuous cold atomic beams propagating in opposite directions from two 2D$^+$ magneto-optical trappings. Acceleration and the rotation rate are decoupled and simultaneously measured by the sum and difference of dual atom-interferometer signals, respectively. The sensitivities of inertial measurements are also increased to be approximately 1.86 times higher than that of a single atom interferometer. The acceleration phase shift is compensated in real time by phase-locking these interferometers via the Raman laser phases from the sum interferometer signal, and the gyroscope perfomance is improved. We achieve long-term stabilities of $6.1 \ μg$ and 840 nrad/s for the acceleration and the rotation rate, respectively, using a short interrogation time of 0.87ms (interference area $A=0.097$ mm$^2$). This work provides a building block for an atomic interferometer based inertial measurement unit for use in field applications that require a high data-rate and high stability. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2210_15346 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Closed-Loop Dual-Atom-Interferometer Inertial Sensor with Continuous Cold Atomic Beams Meng, Zhi-Xin Yan, Pei-Qiang Wang, Sheng-Zhe Li, Xiao-Jie Xue, Hong-bo Feng, Yan-Ying Atomic Physics Quantum Physics We demonstrate a closed-loop light-pulse atom interferometer inertial sensor that can realize continuous decoupled measurements of acceleration and rotation rate. The sensor operates with double-loop atom interferometers, which share the same Raman light pulses in a spatially separated Mach-Zehnder configuration and use continuous cold atomic beams propagating in opposite directions from two 2D$^+$ magneto-optical trappings. Acceleration and the rotation rate are decoupled and simultaneously measured by the sum and difference of dual atom-interferometer signals, respectively. The sensitivities of inertial measurements are also increased to be approximately 1.86 times higher than that of a single atom interferometer. The acceleration phase shift is compensated in real time by phase-locking these interferometers via the Raman laser phases from the sum interferometer signal, and the gyroscope perfomance is improved. We achieve long-term stabilities of $6.1 \ μg$ and 840 nrad/s for the acceleration and the rotation rate, respectively, using a short interrogation time of 0.87ms (interference area $A=0.097$ mm$^2$). This work provides a building block for an atomic interferometer based inertial measurement unit for use in field applications that require a high data-rate and high stability. |
| title | Closed-Loop Dual-Atom-Interferometer Inertial Sensor with Continuous Cold Atomic Beams |
| topic | Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2210.15346 |