Calibration of atomic trajectories in a large-area dual-atom-interferometer gyroscope

Abstract

We propose and demonstrate a method for calibrating atomic trajectories in a large-area dual-atom-interferometer gyroscope. The atom trajectories are monitored by modulating and delaying the Raman transition, and they are precisely calibrated by controlling the laser orientation and the bias magnetic field. To improve the immunity to the gravity effect and the common phase noise, the symmetry and the overlapping of two large-area atomic interference loops are optimized by calibrating the atomic trajectories and by aligning the Raman-laser orientations. The dual-atom-interferometer gyroscope is applied in the measurement of the Earth rotation. The sensitivity is $1.2\times 10^{-6}$ rad/s/$\sqrt{Hz}$, and the long-term stability is $6.2\times 10^{-8}$ rad/s $@$ $2000$ s.

arXiv comment6 pages, 8 figures

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Cited by in corpus (10)

• High-accuracy inertial measurements with cold-atom sensors
• ZAIGA: Zhaoshan Long-baseline Atom Interferometer Gravitation Antenna
• Multi-axis atom interferometer gyroscope with a single source of atoms
• Multi-Dimensional Atom Optics and Interferometry
• Atom Interferometry with Top-Hat Laser Beams
• Accurate trajectory alignment in cold-atom interferometers with separated laser beams
• Precision measurements with cold atoms and trapped ions
• Suppression of Coriolis error in weak equivalence principle test using ^[85]Rb-^[87]Rb dual-species atom interferometer
• Competition effects of multiple quantum paths in an atom interferometer
• Emulating an Atomic Gyroscope with Multiple Accelerometers