A compact cold-atom interferometer with a high data-rate grating magneto-optical trap and a photonic-integrated-circuit-compatible laser system.

Autor: Lee J; Sandia National Laboratories, Albuquerque, NM, 87185, USA. jongmin.lee@sandia.gov., Ding R; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Christensen J; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Rosenthal RR; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Ison A; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Gillund DP; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Bossert D; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Fuerschbach KH; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Kindel W; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Finnegan PS; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Wendt JR; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Gehl M; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Kodigala A; Sandia National Laboratories, Albuquerque, NM, 87185, USA., McGuinness H; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Walker CA; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Kemme SA; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Lentine A; Sandia National Laboratories, Albuquerque, NM, 87185, USA., Biedermann G; Department of Physics and Astronomy, University of Oklahoma, Norman, OK, 73019, USA., Schwindt PDD; Sandia National Laboratories, Albuquerque, NM, 87185, USA.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Sep 01; Vol. 13 (1), pp. 5131. Date of Electronic Publication: 2022 Sep 01.
DOI: 10.1038/s41467-022-31410-4
Abstrakt: The extreme miniaturization of a cold-atom interferometer accelerometer requires the development of novel technologies and architectures for the interferometer subsystems. Here, we describe several component technologies and a laser system architecture to enable a path to such miniaturization. We developed a custom, compact titanium vacuum package containing a microfabricated grating chip for a tetrahedral grating magneto-optical trap (GMOT) using a single cooling beam. In addition, we designed a multi-channel photonic-integrated-circuit-compatible laser system implemented with a single seed laser and single sideband modulators in a time-multiplexed manner, reducing the number of optical channels connected to the sensor head. In a compact sensor head containing the vacuum package, sub-Doppler cooling in the GMOT produces 15 μK temperatures, and the GMOT can operate at a 20 Hz data rate. We validated the atomic coherence with Ramsey interferometry using microwave spectroscopy, then demonstrated a light-pulse atom interferometer in a gravimeter configuration for a 10 Hz measurement data rate and T = 0-4.5 ms interrogation time, resulting in Δg/g = 2.0 × 10 -6 . This work represents a significant step towards deployable cold-atom inertial sensors under large amplitude motional dynamics.
(© 2022. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)
Databáze: MEDLINE
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