Cold Optical Rubidium Atomic Frequency Standard (CORAFS) with Simultaneous EIT Cooling and Interrogation
Abstract
We propose to develop a compact and robust cold optical rubidium atomic frequency standard (AFS) based on a new approach where laser cooling using two-color electromagnetic-induced transparency (EIT) and clock interrogation are performed continuously and simultaneously by the same lasers. In conventional Rb AFS, the use of diode lasers and atoms in vapor cells afford high signal-to-noise ratios and small form factor, but the required heating of the cell to about 100 C prevents rapid turn-on times, a feature that is crucial when the frequency standard or clock is standing by and should be quickly requested as, for example, when GPS signals are intermittent, jammed or absent. The use of cold atoms also leads to reduced environmental sensitivity, better imaging and state detection from atoms spatially localized, and elimination of Doppler and collisional broadening. Objectives and methods include modelling of two-color EIT laser cooling in rubidium, followed by its implementation and optimization in optical molasses or magnetooptical traps. A protocol for a two-color optical frequency standard will then be designed and implemented considering trade-offs between optimum cooling conditions and minimization of light shifts.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 05, 2025
- Source ID
- FA95502410018
Entities
People
- Flavio Caldas Da Cruz
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Campinas