US 11,874,311 B1
Detecting radio frequency electromagnetic radiation using vapor cell sensors and comb spectra
Katelyn Dixon, Kitchener (CA); Kent Arnold Nickerson, Waterloo (CA); Donald Booth, Kitchener (CA); and James P. Shaffer, Kitchener (CA)
Assigned to Quantum Valley Ideas Laboratories, Waterloo (CA)
Filed by Quantum Valley Ideas Laboratories, Waterloo (CA)
Filed on Apr. 5, 2023, as Appl. No. 18/296,307.
Claims priority of provisional application 63/392,404, filed on Jul. 26, 2022.
Int. Cl. G01R 29/08 (2006.01); G01R 35/00 (2006.01)
CPC G01R 29/0885 (2013.01) [G01R 29/0892 (2013.01); G01R 35/005 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A system comprising:
a laser system configured to generate laser signals that comprise first and second laser signals;
an optical comb generator configured to generate a comb spectrum based on the first laser signal, the comb spectrum comprising comb lines at respective comb frequencies;
a vapor cell sensor containing a vapor and configured to generate an optical spectrum based on interactions of the vapor with the comb spectrum and the second laser signal, wherein:
the optical spectrum represents, at least in part, an optical transmission of the vapor at the comb frequencies, and
the optical spectrum comprises a property that changes in response to a radio frequency (RF) electromagnetic radiation interacting with the vapor; and
an optical detector configured to detect the property of the optical spectrum at one or more of the comb frequencies.