All-optical intrinsic atomic gradiometer with sub-20 fT/cm/√Hz sensitivity in a 22 µT earth-scale magnetic field
Abstract
In this work we demonstrate a high sensitivity atomic gradiometer capable of operation in earth-field level environments. We apply a light-pulse sequence at four times the Larmor frequency to achieve gradiometer sensitivity H z at the finite field strength of 22 µT. The experimental timing sequence can be tuned to the field magnitude of interest. Our all-optical scalar gradiometer performs a differential measurement between two regions of a single vapor cell on a 4 cm baseline. Our results pave the way for extensions to operation in higher dimensions, vector sensitivity, and more advanced gradiometers.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 18, 2020
- Source ID
- 10.1364/oe.408486
Entities
People
- A. R. Perry
- M. D. Bulatowicz
- M. Larsen
- Robert Wyllie
- T. G. Walker
Organizations
- Defense Advanced Research Projects Agency