Open AccessEffects related to the temperature of atoms in an atom interferometry gravimeter based on ultra-cold atoms
Author(s) -
Heng Zhang,
Xudong Ren,
Wenhua Yan,
Yuan Cheng,
Hang Zhou,
Zhi Qiang Gao,
Qin Luo,
Min-Kang Zhou,
Zhong-Kun Hu
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.433968
Subject(s) - gravimeter , atom interferometer , ultracold atom , atom (system on chip) , atomic physics , interferometry , dipole , physics , laser cooling , optics , materials science , astronomical interferometer , laser , quantum mechanics , computer science , quantum , embedded system
The temperature of atoms, coupled to several effects, plays an important role in high precision atom interferometry gravimeters. In this work, we present an ultra-cold 87 Rb atom interferometry gravimeter, in which the atom source is produced by evaporative cooling in an all optical dipole trap to investigate the effects related to atom temperature. A condensate containing 4 × 10 4 atoms can be prepared within 3.2 s through an all-optical dipole trap composed of two reservoirs and a dimple. The fringe contrast of our atom interferometry gravimeter reaches up to 76(4)% due to the advantage of ultra-cold atom source even at a free evolution time of T=80 ms. A resolution of 6 μGal (1 μGal=1×10 -8 m/s 2 ) after 3000 s integration time with a sampling rate of 0.25 Hz is achieved in this atom gravimeter. The relationship between the fringe contrast and the atom temperature in the atom gravimeter is studied; in addition, the wavefront aberration effect in the atom gravimeter is also investigated by varying the temperature of atoms.