Open AccessLow noise measurement method based on differential optical interferometer for cold atom experiments
Author(s) -
Xiaoying Ma,
Xian Zhang,
Kaikai Huang,
Xuequan Lu
Publication year - 2019
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.381560
Subject(s) - interferometry , optics , physics , astronomical interferometer , atom interferometer , differential phase , noise (video) , photodetector , phase noise , ultracold atom , shot noise , phase (matter) , detector , quantum mechanics , artificial intelligence , computer science , image (mathematics) , quantum
We proposed and realized a low noise measurement method based on differential optical interferometer to measure trapped cold atoms in a magneto-optical trap (MOT). The configuration is based on a Mach-Zehnder type interferometer, which is composed of two beams of different frequencies. A long-term stability in phase monitor has been obtained by use of the vibration immune mechanism through subtraction of the interferograms imaged on the two photodetectors. With this new configuration, the noise caused by environmental perturbation is greatly reduced at low frequency while the signal of phase shift keeps a good long-term stability.