Self-Alignment of a Large-Area Dual-Atom-Interferometer Gyroscope Using Parameter Decoupled Phase Seeking Calibrations

We realize a Mach-Zehnder-type dual-atom-interferometer gyroscope with an interrogation arm of 40 cm length and the interference area up to 1.2 cm\(^2\). The precise angular alignment of the large-scale separated Raman lasers is demonstrated by seeking the phase intersection of Ramsey-Bord\(\acute{e...

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Bibliographic Details
Published inarXiv.org
Main Authors Zhan-Wei, Yao, Hong-Hui, Chen, Si-Bin, Lu, Li, Run-Bing, Lu, Ze-Xi, Xiao-Li, Chen, Geng-Hua, Yu, Jiang, Min, Sun, Chuan, Wei-Tou Ni, Wang, Jin, Ming-Sheng Zhan
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 25.01.2022
Subjects
Crosstalk
Decoupling
Gyroscopes
Inertial sensing devices
Interferometers
Interrogation
Raman lasers
Rotation
Self alignment
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Summary:We realize a Mach-Zehnder-type dual-atom-interferometer gyroscope with an interrogation arm of 40 cm length and the interference area up to 1.2 cm\(^2\). The precise angular alignment of the large-scale separated Raman lasers is demonstrated by seeking the phase intersection of Ramsey-Bord\(\acute{e}\) interferometers after the gravity effect is compensated and by decoupling the velocity dependent crosstalk phase shifts, and applied to build the Mach-Zehnder atom interferometer. Then a compact inertial rotation sensor is realized based on dual large-area Mach-Zehnder atom interferometers by precisely aligning the large-scale separated Raman lasers, in which the coherence is well preserved and the common noise is differentially suppressed. The sensor presents a sensitivity of \(1.5\times10^{-7}\) rad/s/Hz\(^{1/2}\), and a stability of \(9.5\times10^{-10}\) rad/s at 23000 s. The absolute rotation measurement is carried out by adjusting the atomic velocity which corresponds to modulating the scale factor.
ISSN:2331-8422