Microwave-field sensing via electromagnetically induced absorption of Rb irradiated by three-color infrared lasers

A microwave electric field sensing has been set up based on a three-color electromagnetically induced absorption in rubidium vapor cell via cascading transitions. All transitions are irradiated by infrared lasers: a 780 nm laser servers as probe to monitor the optical transmittancy via transition 5S...

Full description

Saved in:
Bibliographic Details
Published in:Optics express 2022-05, Vol.30 (10), p.16619-16629
Main Authors: You, S. H., Cai, M. H., Zhang, S. S., Xu, Z. S., Liu, H. P.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A microwave electric field sensing has been set up based on a three-color electromagnetically induced absorption in rubidium vapor cell via cascading transitions. All transitions are irradiated by infrared lasers: a 780 nm laser servers as probe to monitor the optical transmittancy via transition 5S 1/2 →P 3/2 ;, a 776 nm laser and a 1260 nm laser are used to couple the states 5P 3/2 and 5D 5/2 and states 5D 5/2 and 44F 7/2 , respectively. We find that a frequency detuning ∼2 π × ( − 40) MHz of the 776 nm dressing beam prefers to a better signal-to-noise ratio for the probe beam. The off-resonance greatly depresses the double resonance pumping effect. A demonstration measurement for the electric field of microwave 1.18988 GHz, corresponding to the coupling resonance between two adjacent Rydberg states 44F 7/2 and 44F 9/2 , gives a sensitivity of 55.79 ( 23 ) nVcm − 1 / Hz and a smallest discernible electric field of 78.9(33) nVcm −1 in time scale of 500 ms.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.454433